Best Cannabis Fertilizer: A Grower’s Guide to Nutrients For Every Stage & Setup

The best fertilizer for cannabis gives your plants the right nutrients at the right time, from the early stages to harvest time. Pick the wrong feed, or too much of it, and you’ll fight nutrient burn, lockout and weak buds. This cannabis fertilizer guide covers everything you need to know, including:

  • What cannabis fertilizer is and which nutrients your plants need.
  • How the NPK ratio shifts across each growth stage.
  • How organic and synthetic feeds compare.
  • Which fertilizer type is best for soil, coco and hydro setups.
  • Cannabis fertilizer products that earn their place.
  • How to feed without burning your plants.
  • And when to ease off before harvest.

Get the basics right and healthy, high-yielding plants follow.

What is Cannabis Fertilizer?

Cannabis fertilizer delivers the nutrients your plants can’t always pull from their growing medium. Most feeds supply nitrogen, phosphorus and potassium, plus a set of secondary and trace elements. Your soil or coco holds some of these early on, but plants burn through them as they grow. That’s when the right feed keeps growth, flowering and yield on track.

What Nutrients Do Cannabis Plants Need?

Cannabis plants need three macronutrients plus a handful of secondary and trace elements. The big three are nitrogen, phosphorus and potassium, shown as the NPK numbers on every bottle. Secondary nutrients and micronutrients fill smaller but essential roles across the life cycle. Get the balance right and your plants reward you with steady growth and dense buds.

Macronutrients: Nitrogen, Phosphorus and Potassium (NPK)

Nitrogen, phosphorus and potassium do the heavy lifting in any cannabis fertilizer. The NPK numbers on a bottle, like 20-20-20, tell you the ratio of each element in the mix. Here’s what each one does:

  • Nitrogen (N) drives leaf and stem growth and feeds the chlorophyll behind photosynthesis.
  • Phosphorus (P) fuels root development and powers bud formation during flower.
  • Potassium (K) builds bulk, regulates water movement and enzyme activity, and toughens the plant against stress.

Secondary Nutrients and Micronutrients

Secondary nutrients and micronutrients handle the jobs NPK can’t, like chlorophyll and cell walls. Calcium, magnesium and sulfur are the secondary nutrients your plants use in moderate amounts:

  • Calcium strengthens cell walls and supports new root and shoot growth.
  • Magnesium sits at the center of chlorophyll and drives light absorption.
  • Sulfur supports proteins and helps build the terpenes behind smell and flavor.

Micronutrients like iron, zinc, manganese, copper, boron and molybdenum work in trace amounts. Quality nutrient lines already include them, so you rarely need to add them separately.

What’s the Best NPK Ratio for Each Growth Stage?

The best NPK ratio shifts as your cannabis plants move from seedling to flower. Nitrogen leads early, then phosphorus and potassium take over once buds form. Here’s how the feed changes across the three main stages:

  • Seedling: little to no added feed while the plant lives off its medium.
  • Vegetative: a nitrogen-rich mix to build leaves, stems and a strong frame.
  • Flowering: low nitrogen with high phosphorus and potassium for bigger buds.

Seedling Stage Nutrients

Seedlings need little to no added fertilizer for the first few weeks. Quality soil already holds enough to carry them through early growth. In coco or a soilless mix, use a mild balanced feed near 1-1-1 at quarter strength. Overfeeding now burns tender roots, so start light and build up slowly.

Vegetative Stage Nutrients

Vegetating cannabis plants need a nitrogen-rich feed to fuel fast leaf and stem growth. Aim for a nitrogen-dominant ratio like 3-1-2 or 4-1-2 during this stage. Strong vegetative growth builds the frame that carries heavy buds later. Start at half strength and watch the leaves, then increase if growth slows.

Flowering Stage Nutrients for Bigger Buds

Flowering cannabis uses less nitrogen and far more phosphorus and potassium. Switch to a bloom ratio like 1-3-2 or 1-5-4 once buds start to form. Phosphorus drives flower sites while potassium adds density and weight. Too much nitrogen now shrinks your buds and dulls the flavor, so ease off it.

Organic vs Synthetic Cannabis Fertilizer: Which is Better?

Neither organic nor synthetic fertilizer wins outright, because each does a different job better. Organic feeds your soil slowly and forgives mistakes. Synthetic feeds the roots fast with precise, ready-to-use ratios. Your setup and your goals decide which one fits.

Organic Cannabis Nutrients

Organic cannabis nutrients feed the microbe life in your soil, releasing slowly over time. They come from natural sources like compost, manure, kelp, bone meal and worm castings. The slow release makes overfeeding rare and often deepens the smell and flavor of your buds. Organic works best in living soil, where bacteria and fungi break it down for the roots.

If you like the hands-on route, you can build your own feed at home. Compost, chicken manure, kelp meal and worm castings each add nutrients as they break down. Homegrown’s Organic Plant Booster gives you a bottled organic option if mixing isn’t your thing.

Synthetic Cannabis Nutrients

Synthetic nutrients hit the roots fast with precise, ready-to-use ratios. They dissolve into forms your plants absorb right away, which speeds up growth. That makes them the easy choice for soilless mediums like coco coir or hydroponics and for dialing in exact feedings. They’re also easier to overdo, so measure carefully and flush before harvest to keep the flavor clean.

How to Choose Fertilizer for Your Growing Medium

Your growing medium decides which cannabis fertilizer fits best. Soil holds nutrients and buffers mistakes, while hydro and coco need complete feeding from the start. Match your feed to your setup like this:

  • Soil: lighter feeds plus the nutrients already in your mix.
  • Hydroponics: fully soluble synthetic nutrients with no organic matter.
  • Coco coir: hydro-style feed plus extra calcium and magnesium.
  • Outdoor: slow-release organics and amended soil for the long season.

Best Cannabis Nutrients for Soil

Soil-grown cannabis needs lighter feeding because the medium already holds nutrients. Good potting soil usually carries seedlings for 2-3 weeks before you start feeding. After that, balanced grow nutrients and bloom nutrients cover the whole cycle. Organic amendments like compost and worm castings suit soil especially well.

Best Hydroponic Nutrients for Cannabis

Hydroponic cannabis depends on fully soluble nutrients for every element it needs. With no soil to draw from, the water has to deliver complete nutrition. Choose synthetic, mineral-based feeds that won’t clog your pumps or lines. Watch your EC and PPM closely, since plants in water respond fast to any change.

Nutrients for Coco Coir

Coco coir cannabis grows like hydro but typically needs extra calcium and magnesium. The fiber binds these elements, so deficiencies show up without a cal-mag supplement. Use a hydro or coco-specific feed and hold the pH at 5.8 to 6.2 (with 5.6 to 6.4 being the upper limit). Alternate nutrient feeds with plain water to stop salts from building up.

Best Fertilizer for Outdoor Grows

Outdoor cannabis thrives on amended soil and slow-release organic feeds. Rich living soil feeds plants steadily across a long summer season. Compost, manure and bone meal build that soil before you plant. Container grows that live outside dry out fast, so check moisture daily in peak heat.

The Best Fertilizers for Cannabis

The best cannabis fertilizers match a clean NPK shift to your stage and medium. A few proven options are available to most growers. Here are some of our top picks:

  • Homegrown Evergreen Charge and Grow Kit: a complete in-house base feed.
  • Homegrown Bloom Nutrients: phosphorus and potassium for bigger buds.
  • ILGM Bean Booster and Plant Protector: germination and plant-health support.
  • FoxFarm Soil Liquid Trio: a three-part liquid feed for soil.
  • General Hydroponics Flora series: a three-part hydroponic nutrient system.
  • Dyna-Gro Grow and Bloom: a simple two-bottle system for soil and hydro.

Homegrown Evergreen Charge NPK Controlled-Release Fertilizer

Homegrown’s Evergreen Charge delivers controlled-release NPK nutrients straight into your soil. Mixed with water, this cannabis fertilizer powder feeds steadily over weeks, which reduces the risk of over- or underfeeding. It’s ideal for beginner growers, low-maintenance grows and outdoor cannabis gardens.

Evergreen Charge is also available as part of Homegrown’s Full Strength Grow Kit, which includes Underground Mix mycorrhizae powder and Fortify Pro (a cal-mag supplement). Fortify Pro adds the calcium and magnesium that coco coir grows often need. Underground Mix brings mycorrhizae to the root zone for better nutrient uptake.

Homegrown Sweet Bloom and Flower Booster for Bigger Buds

Homegrown’s bloom nutrients push phosphorus and potassium when your plants flower. Sweet Bloom is a 100% plant-based liquid fertilizer used for bud development and quality. Flower Booster targets bud size, potency and density through the bloom phase. Both of these flowering-stage cannabis fertilizers are suitable for all grow mediums.

ILGM Bean Booster and Plant Protector

ILGM’s Bean Booster and Plant Protector range support your grow around the edges of feeding. Bean Booster is a diluted hydrogen peroxide soak that helps your cannabis seeds germinate faster and cleaner. Plant Protector is a three-bottle set that defends roots, leaves and buds from pests and mold. 

Neither replaces your cannabis base nutrients, but both protect the investment your feeding makes.

FoxFarm Nutrient Trio

FoxFarm’s Soil Liquid Trio feeds cannabis in soil with three liquid fertilizers. Grow Big handles veg, Tiger Bloom powers flowering and Big Bloom feeds the soil all cycle. Big Bloom leans on natural inputs like earthworm castings and bat guano. Start at half strength and follow the FoxFarm feeding schedule, since the trio runs strong.

General Hydroponics Flora Series

General Hydroponics’ Flora series is a three-part hydroponic nutrient system. FloraMicro carries nitrogen, calcium and trace minerals for the base diet. FloraGro adds nitrogen and potassium for leaf and stem growth. FloraBloom brings phosphorus, potassium and magnesium for flower development.

Dyna-Gro Grow and Bloom

Dyna-Gro’s two-bottle system feeds cannabis from seedling to harvest. You run Grow (7-9-5) in veg and Bloom (3-12-6) in flower, then follow the label. Both excel in soil and hydroponics, which makes them a strong pick for beginners.

How to Use Cannabis Fertilizer Without Burning Your Plants

Use cannabis fertilizer at reduced strength first, then build up as your plants ask for more. Most labels recommend more than cannabis actually needs, so starting low protects your roots. Nutrient burn shows as brown, crispy leaf tips and can’t be undone once it hits. Slow down the moment tips start darkening, and flush with plain water if it spreads.

How Much Fertilizer Should You Give Your Weed Plants?

You should start at a quarter to half the dose the label recommends. Increase slowly and only when the plant shows it’s hungry, like pale lower leaves. Feeding every other watering suits most soil grows, while hydro feeds with each watering. A little goes a long way, so resist the urge to push more nutrients.

Autoflowers feed even lighter than photoperiod plants, so go gentle if you’re planning to buy autoflower seeds for your next grow.

Why pH Matters Before You Feed

Root-zone pH controls whether your plants can absorb the nutrients you give them. Outside the right range, nutrients lock out even when they’re present in the medium. 

  • Keep soil pH between 6.0 and 6.3, and don’t let it climb past 6.5, where micronutrients start locking out. 
  • Coco and hydro run a touch lower, dialed in at 5.8 to 6.2.
  • Check your water’s pH before every feed, and test the runoff to track the root zone.

How to Spot and Fix Cannabis Nutrient Deficiencies

A cannabis nutrient deficiency shows up in leaf color and growth rate before it costs you yield. Pale, yellowing lower leaves usually mean too little nitrogen, while burnt, clawing tips mean too much. Mobile nutrients like nitrogen fade from old leaves first, while immobile ones like calcium hit new growth. 

Catch the signs early, check your pH and fix a cannabis deficiency one change at a time before it spreads.

When Should You Stop Fertilizing Cannabis?

Stop feeding your plants by easing off nutrients in the final weeks before harvest, a step many growers call flushing. Most growers switch to plain, pH-balanced water for the last 1-2 weeks. The idea is to clear leftover salts and smooth out the final flavor. Research shows the effect is modest, so treat flushing as a choice, not a rule.

Fertilizer is Only Part of a Great Cannabis Grow

Even the best cannabis fertilizer can’t rescue weak genetics, so feeding is just one piece of growing weed well. Overfeeding and nutrient burn stress a plant, and serious stress, usually from irregular light cycles or heat during flowering, can push a female to throw male flowers.

Knowing the early signs of a hermie plant helps you act before pollen ruins a crop. Only female plants grow the buds worth feeding, so learn to tell your male vs female cannabis plants apart early.

Ultimately, a strong grow starts with stable genetics like feminized seeds bred for reliable all-female plants. When you’re ready to start fresh, eligible adult growers can buy feminized seeds. At ILGM, you can also buy cannabis seeds across every seed type and category to match your space and goals.

That said, always check the applicable federal, state and local laws before buying or germinating any marijuana seeds.

Cannabis Fertilizer FAQs

How Often Should You Fertilize Cannabis?

Feeding frequency depends on your medium and growth stage. Soil growers usually feed every other watering, letting the soil dry between feeds. Hydro and coco growers feed with most waterings, since those mediums hold no reserves. Always start light and adjust to how your plants respond.

Can You Use Miracle-Gro or Regular Plant Food on Cannabis?

Technically, you can, but Miracle-Gro and regular plant foods aren’t ideal for cannabis. Many garden products use slow-release formulas that dump too much nitrogen during flowering. That hurts bud development and can taint the flavor. A liquid feed with the right NPK for each stage works far better for cannabis.

Is There a Difference Between Liquid and Dry Fertilizer?

No, there’s not much difference between liquid and dry cannabis fertilizer beyond convenience. Dry nutrients are the same nutrients without the water, so they typically cost less and store longer. Liquid feeds dissolve instantly and are easier to dose for small grows. Both grow great cannabis when you follow the feeding schedule.

Do You Need Fertilizer to Grow Cannabis?

If you’re using coco coir or a hydroponic setup, then yes, you must supply your weed plants with complete nutrition through fertilizer. Rich living soil or pre-amended super soil can carry plants from seed to harvest on water alone. Most soil growers still feed at some point to hit their best yields.

What is the Best Organic Fertilizer for Cannabis?

The best organic fertilizer is the one matched to your soil and stage. Compost, worm castings and bat guano build healthy living soil over time. Bottled organic feeds work well too, though the biggest gains come from amended soil. Organic growing rewards patience with cleaner aroma and flavor.


Looking to grab some nutrients? Read some of our happy customer experiences!

101 thoughts on “Best Cannabis Fertilizer: A Grower’s Guide to Nutrients For Every Stage & Setup”

  1. You say 20% of water out the bottom wouldn’t that be excessive in root or stem area I’ve been keeping it lightly moist but have always thought may need more water so how do I know for sure on how much water is rite without looking at roots?

    Reply
  2. Hello. My. Name. Is. Christopher. I. Would. Like. To. Learn. More. About. Marijuana. And. It’s. Contents. Thankyou.

    Reply
  3. hey guys, I need more potting soil, I’m just starting out so i want to keep things very Simple for now. I see the fertilizer here, but I just need potting soil to start with, can I get a Recording here??

    I have some “Espoma Organic Potting Mix”, I believe it was this site I got the link from where I bought, should I just buy more of it or is there Something better??

    thanks big time!!

    Reply
    • Terry, I use MAP in my greenhouse mix. I do not know what you are mixing MAP with so, I cannot give you an informed answer. Join our support forum: ilgmforum.com where we are set up for daily Q & A. We will be glad to share whatever knowledge we have on the subject; there. 🙂

      Reply
    • Et and Kau’ilani, Thanks guys!

      If you like all the info here in the blog perhaps you would even more enjoy Our Forum, Here: Support.Ilovegrowingmarijuana.Com. We Have Many Sharing Members And Expert Staff That Can Clarify Different Aspects Of The Grow And Harvest To You 🙂

      Reply
  4. When to harvest? My eyesight has become questionable and very hard to see the bus progress. Presently my cauliflower of kush has big buds and extreme amount of hairs. Some are turning a light brown. The bids are glistening with trichromes.

    Reply
    • Jon,

      you generally harvest by checking the clear, cloudy, amber % of the trichomes with a 30x-100x scope. I am also legally blind and this can be hard. 2 things I monitor to know when plant is finishing is: 1. When the pistils stop producing new bud calyx, and when the hairs are almost all red. This is not perfect but, will get you in the ball park. A couple weeks either way won’t hurt anything. It will just slightly affect the effect you would feel when smoking the bud.

      Happy growing 🙂

      Reply
    • Your Bible helped me last year alot. My choice of fertilizer was dr. Earth fish emulsion and bat guano and that’s all I used that I had great harvest and yield but the flavors of even my different plants tasted all the same can you tell me possibly what I did wrong or what I need to do to change that.

      Reply
      • David,

        I advise you to take this type of Q and A to our forum, here: ilgmforum.com. We have many sharing members and expert staff that can clarify different aspects of the grow and harvest to you 🙂

  5. I planted my Harle-Tsu, Kryptonite and 24K directly into compost and used Fish Emulsion and water from our duck pond to fertilize during their growth phase. The Harle-Tsu grew between 7 to 8 1/2 feet tall. The Kryptonite were between 5′ – 6 1/2 feet tall. I trimmed the top colas off of all of them and ended up with 6 to 8 colas on the lower branches that averaged around 16″ to 18″ in length. My one 24K that was planted late in the season only got about 4′ tall, but the top cola was 20″ long and after drying filled a 1/2 gallon canning jar. The rest of the colas on the 24K filled a second 1/2 gallon jar. My Harle-Tsu plants produced, on average, 20 oz of bud per plant, the Kryptonite around 22 oz and the 24K about 10 oz.

    Reply
  6. I want to fertilize but I am unsure if after mixing chosen nutrients do I ph the mix to 5.5-6.5, or do you just pour the nutrient mix as is? My mix was over ph12 when tested.

    Reply
  7. Vermiculite and perlite are completely different things. Perlite for strictly aeration vermiculite for water retention and aeration

    Reply
  8. Hi Robert,
    I’m going to start up again. Try it outdoor again. Now I know about the deer, I have another question.
    What other plants could turn a female marijuana plant into a male one?
    Some say, only a male marijuana plat has the potential to turn a female into a male. Others go further and say it has to be the same strain even; a female indica can only be turned by a pure indica male plant. I don’t think they are so picky. Given the right circumstances (at a time of weakness or stress) a male marijuana plant could turn a female plant male, regardless of the strain. There are even some non marijuana plants that if they are healthy male and there is a stressed out weakened female marijuana plant suffering somewhere nearby, chances are you will wake one day soon to find it popping seed pods instead of flowering.
    What are the facts? What do I need to protect my girls from?
    Thanks for your help!

    Reply
    • RC,

      Plants do not change the sex of other plants, regardless of strain or sex, or genetic disposition. Males cannot turn a female into a male. Males can pollinate females causing them to produce seeds. That’s it.

      Stress can cause females to “hermie” and that would cause the female to produce her own pollen sacks and there by pollinate the plant itself. Basically that is it. The facts.

      Happy growing 🙂

      Reply
  9. Humboldt nutrients great flavor.
    Ionic bloom
    Canna
    House and Garden

    You can not go wrong with those lines. Way better than General Hydroponics.

    Reply
  10. Basically, as your article suggests, marijuana plants are best suited for organic fertilizers as urine and chicken manure can be effective ways to fertilize them. That sounds like a very interesting concept to explore more on. I’ll try to see what other organic fertilizers are out there and how effective can they be for plants other than marijuana. Thanks!

    Reply
  11. 1st TechnaFlora B.C. Boost line
    2nd House and Garden
    3rd Foxfarm

    Additives – Big Bud , Bloombastic, Roots Exculerator, Great White, Awesome Blossoms, Hygrozyme

    Reply
  12. Somebody who has grown plants and is good at it and knows how to grow successful healthy plants can you guys give me the best fertilizer and nutrients and lamps I need? Im new to this i heard different watt lights grow different amounts…. 600 watt grows like 8 oz and 1,000 watt grows up to 14 oz…… So if somebody can tell me everything I need to grow a marijuana plant successfully would be truly helpful and appreciated it…… Im trying to grow mines in a pot not hydropolics and it will be indoors.

    Reply
  13. What are the best growers conferences and tradeshows to attend? I am mostly interested in learning more about the fertilizer for growing.

    Reply
  14. What are the best growers conferences and tradeshows to attend? I am mostly interested in learning more about the fertilizer end.

    Reply
  15. miracle grow does a better job than most of the other shit you could by and pay much.more .I know by experience it works wonder .The company won’t tell you or tell you it’s not good for many reason but the obvious money.

    Reply
    • Hey Luke. My name is Greg and I am new to this and read by all the “experts” to not use Miracle Grow. I looked at some of the others and too much money. Can you tell me how you use MG and how often? Thank you!!

      Reply
  16. This is the first site that actually mentions Advanced Nutrients. I started with GH trio but the fluctuation in the ph was so great that there were too many problems with my grows. I switched to Advanced PH perfect 3 part and things have been great since. I know there are cheaper nutrients but this works great for me and the water I have coming out of my well. I use nothing but ILGM seeds. You guys rock.

    Reply
  17. Mainah,

    We have never used Neptune Harvest, and we are not in the habit of critiquing a product in the blog; However, It is a commercially sold nutrient. Fish fertilizer is high in Nitrogen. As far as the whole line, I have no idea.

    Perhaps you would enjoy joining our support forum and see what all the members are using. I personally have used many different nutrient lines over my career, and now I am using ILGM’s Flower Power. I switched after doing a side by side comparison to Foxfarm and Botanicare nutrients. Super easy to use.

    Happy growing

    Reply
    • Rcik,

      No new “hot” droppings of anything is good for your plants. Manure; Whatever the source has to be composted for 6-12 months with other carbon, and mineral sources.

      Happy composting 🙂

      Reply
  18. Good information appreciate the pictures .
    I know now not To add nutrients
    Hope won’t mess up the buds in the budding stage

    Reply
  19. I grow outdoors and use composted horse manure or composted sheep manure. It works amazingly well. Not sure how much of which nutrients are in either of them but you can’t argue with success.

    Reply
  20. Why would some be suspicious of the smell of viniger An why would you do this co2 bomb of a night? Plants only use co2 of a day so doing that at night would be pointless

    Reply
  21. Ugh, i forget i thing to tell, my growing place is hybrid, i mean that becoz i got indoor but not complete indoor, i grow my plants at balcony. Thus i meant hybrid. Also My home place at downtown area thus my plants are not get enough dark by car’s head light at the night time, i wonder this is the one reason too thats why not to bloom.

    Reply
  22. could someone tell me why plant are not starting bloom even its over 3 months from blooming time. it’s show just white head and those are going into become nothing but brown and dry. After i read this blog i notice one things i was fed my plants over does of Nutrient because they got brown leaves tips. Is that why my plant are not start blooming? And another thing i would like to asking about is, what are the things which occur on my plant’s leaves and also stem and branch. I don’t know how to call those, it’s look like some kind of ladybug or cocoon in browny color but those are not living thing(i mean that bcoz those are not moving and it doesn’t look like insert or bug. May be eggs, I’m not sure about this too) May someone could be able to tell me why? i was grow last year then failed and now i waiting for “May” that the time to start grow and also i learning to be this time for sure what i want. Thanks

    Reply
  23. Can anyone tell me how well worm castings work? I have several earthworm bins of dark,rich ,earthy smelling castings! Scored some AutoFlowering WW seeds and don’t want to mess up. Any ideas? PLEASE email me!!!!! Is diabetic piss good for my plants?

    Reply
    • SRV,

      Hello. You should join our support forum at ilovegrowingmarijuana.nl.

      All the info you nrrf to learn how to grow successfully is contained there, and we have many helpful knowledgeable growers and experts alike who are always willing to share. 🙂

      Reply
  24. Thanks Robert! Very good article. Do you prefer dry fertilizers or liquids? I would seem to me that liquids would disperse in water more readily.

    Reply
    • Hello Rick,

      Liquid nutrients are nothing more than powder form ingredients mixed with water. One is not better than the other. It is a matter of choice and convenience. Some people do not want to spend the time to mix nutrients, and are therefore willing to pay for water (liquid nutrients) to be shipped to them. Either way; If you buy a commercial nutrient system from a reputable company, both will work just as well. 🙂

      Happy Growing

      Reply
  25. I’ve got the best advices ever
    Please guys I’m here in Swaziland, Africa so I’m starting my business in dagga growing so please help me with any information in case u have and I will b using soil in an open space to do it.
    I’m also a student here at the university of Swaziland in the faculty of agriculture
    thanks a lot guys

    Reply
  26. I’m a new b by accident. I got some smoke from Colorado. I found a few seeds,i planted them and they took off. I live in the city with close neighbors, so i had to move the plants inside,3 of them took. I built a grow hut,and now i have some nice tops popping out. I do not know what the plants are but i thought i would try to put up a couple pics and may b some one who knows what’s what can give me some advice. Thanks,this sight also came through with seeds. I tried to order some from another place,and they were very bad as a seller.

    Reply
  27. This article just completely re arranged my outdoor grow, and never knew about human urine as an alternative additive!!

    Reply
  28. I think it is very unlikely that any portable CO2 generator could significantly alter an outdoor garden for more than a few minutes- even with dead calm air. Your ‘room’ is the size of a gymnasium
    Physics teacher

    Reply
  29. I have used sugar and yeast to make Co2 for my planted aquariums. Wouldn’t it also work as well as the baking soda and vinegar method?

    Reply
  30. I not clean my gutters out so every year I take the composted pecan tree debris and use it as a planting medium and I catch the rain water from the guttering in a 55gal barrel with a air bubbler running in it.it seems to work great.is this good enough you think?

    Reply
    • fish, I cannot vouch for your gutter compost. Best to have a test done by your local agriculture extension agent. You cannot get vbetter information than that.

      As far as rain water. Keeping it aerated is a good idea. it is strongly advised that you PH the water before using it in the garden. PH 6.5

      Reply
  31. I think you will have to monitor and learn how your plants respond to corporate grow mediums. I believe you can successfully grow in this medium; however; I think you could do better.

    Growers striving to achieve maximum quality and yield in their grows do not use commercial garden variety fertilizers.

    Reply
  32. What do you think about Peter’s 20/20/20 in the early stages? what should I finish the blooming stage Out wirh if anything at all

    Reply
    • If you want to make it really simple mix Peter’s 20/20/20 half and half with Peter’s 10/30/20 Blossom Booster at a rate of 1/8 tsp “each” per gal every watering or 1/4 tsp each per gal every 7-10 days…start to finish. You really don’t need anything else. Peter’s has been doing this for over 64 years.

      Reply
  33. If plant crop is woman how female?♧♧♧♧♧♧♧♧♧♧7
    @g13 will win hash from our country tensing fokk hers
    Mr ten
    So police in amsterdam let my passport then let
    Growroom party50

    Reply
  34. Generally we would like to see this added top the soil a bit sooner. You could add some before flowering which would jump start the root growth.

    Reply
  35. Believe it or not,google it.A cup of fresh urine in a gallon of water is great nute for any fruiting plant.Nutes are readily available so plants can use them immediately.
    I used worm casings in early veg,then worm casings with urine during mid veg and mine strayed showing their pheno types before sending.Secondary branching will begin and plant will fill out.
    Urine is highest in N but it has sufficient levels of p and k also.

    Reply
  36. I use a tea of goose poop with a bit of molasses Fish heads and guts bottom of hole when planting. Plants will become huge soon

    Reply
  37. best and easyest outdoor/about toping it how big before toping it/picking leaves off it and best to feed it;;;; thank you;;

    Reply
  38. No co2 at night is good advice . Miracle grow works good but not great . Need a recipe for short thick plants hearty and stubby with more buds than leaves for small confined areas to grow in.

    Reply

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