Best Organic Nutrients for Outdoor Grow

If you live in a warm climate, or are looking to grow cannabis seasonally, you may choose to grow your cannabis plants outdoors. Since it’s much more difficult to control all the external factors affecting your plant with an outdoor grow, it’s important to at least control and optimize your plant’s nutrients intake. This means finding the best possible nutrients to feed your plant.

We’ve simplified that process for you by finding the best nutrients on the market for your outdoor grow. Each nutrients solution offers its own set of benefits, and we recommend that you look through all the available products. However, if you’re busy and just want a reliable, quality nutrients solution to use on your outdoor cannabis plants, try any of the first three options listed below.

 1. General Hydroponics General Organics Go Box

General Hydroponics GH5100 General Organics Go Box GH

Free shipping
Last update was on: May 23, 2022 1:44 pm
in stock
$94.99

This nutrients kit from General Hydroponics makes it easy for first time growers by including everything you need to grow in one neatly packaged box. This line of premium nutrients includes a 16 ounce bottle of BioThrive Grow and Bloom fertilizers, and 8 ounce samples of General Hydroponics’ complete line of GO liquid supplements. Consider these 8 ounce samples like a tester pack, so you can try out some of their other products before committing to buying the full size

Why choose this product?

This product is our favourite overall organic nutrients solution. It’s easy to use, and comes with everything you need in one neat package.

What other growers are saying:

“This was great for me bc I do not have a natural green thumb. This took most of the stress and worry away. As well, the price was good for what it gives. I grew 7 lovely flowering plants in my tent over this past winter with this kit. I still have enough of most nutes to grow another 4+. I knocked a star off bc as many others have stated, the bottles can leak/burst I lost a fair bit of a couple products this way…and it smells bad!

Good stuff, noticed a growth spurt after using, end results looked great. Easy to use and follow.

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2. Dyna-Gro Liquid Grow & Liquid Bloom

Dyna-Gro DYNAGB8OZSET Liquid Grow & Liquid Bloom, 8 oz

Last update was on: May 23, 2022 1:44 pm
in stock
$19.95 $28.99

These 8 ounce nutrient solutions contain all of the nutrients—both macro and micro nutrients—that your plants need to thrive. This nutrients package comes at a fantastic value, and is extremely easy to use, making it the perfect product for first time growers. The Dyna-Gro package will get you through both your vegetative and flowering stages of your plant’s grow cycle. All in all, this nutrient solution package offers 16 different nutrients that will help your plant live up to its full potential. This nutrient package is also a great product to use if your soil is not optimal. In other words, if you’re trying to grow cannabis in hard, infertile soil that’s full of pebbles, these nutrients solutions will help your plant to overcome these trying conditions. These nutrients solutions also make it easy for new growers by offering detailed instructions about how to properly feed your plants the nutrients provided. This will help you make a smooth transition from the vegetative stage to the flowering stage, using the right set of nutrients at every turn.

Why choose this product?

This nutrients solution is a great option for growers looking for value. This is an effective product at a great price.

What other growers are saying:

“I’m jumping in the same boat as everyone else. This stuff really is incredible. I first noticed it with my Datura Trumpet Flower. Right now, I have 16 blooms on it for a winter bloom, and it’s only 3 feet tall. Very noticeable increase in blooms and vegetative growth with both fertilizers.I started feeding my Marijuana seedlings within the last week and a half, and it has literally tripled the size in less than a week. Really excited to see what a full cycle will look like, including yield. I have high hopes. If it continues to perform the way it has been, I’ll definitely buy again.”
Jessica Rosthvile
  

“I am so impressed! I got and am having great growth, really unexpected success (I am using it with mycorrhizal stuff, Myco+, also fabulous), new young plants already flowering, and, amazing for me, nothing fading away. I’ll be using this forever! (One specific: I have a brugmansia, in a pot, several years old. I bring it in for the winter, and this winter it nearly died. I’ve always disliked that it had a long, bare trunk, but even fertalized every time I watered it, nothing changed. Now, all of a sudden, I have growth along that trunk. Amazing!)”
Vee Wardwell

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3. General Hydroponics CALiMAGic Quart

Helps Prevent Blossom End Rot & Tip Burn, Clean, Soluble

Free shipping
Last update was on: May 23, 2022 1:44 pm
in stock
$16.99 $18.83

These nutrients by CALiMAGic are specifically designed for growers who need to give their plants a quick and effective injection of potassium, and other nutrients that are designed to optimize flower growth and flavour. The reason this nutrient solution helps your plants potassium intake is because it contains a healthy portion of calcium, which not only improves your plant’s root growth, but also helps your plant to absorb more potassium. This nutrient solution also offers a healthy dose of magnesium, which allows your plant to more efficiently produce chlorophyll, and glucose, which is a sugar that your plant needs to create energy. CALiMAGic’s general hydroponics solution is helpful for outdoor growers who are trying to grow fast-growing strains in order to yield as many plants as possible in one season. This is because these fast growing strains often experience nutrient deficiencies. So, if your plant’s leaves begin to turn yellow around their edges, try feeding it this nutrients solution.

Why choose this product?

This product has been known to enhance the flavour of your cannabis flower, making for enjoyable consumption.

What other growers are saying:

“If you get yellow edges on the leaves or mottled yellow/green spots it is likely a magnesium deficiency. If you have small wrinkled leaves, it is likely a calcium deficiency. This product fixes both of these problems. If you don’t need calcium you can use epson salt for the magnesium.”
Jeremy Rothschild

“Why mess around with homemade concoctions when you can just get this and not worry. It will last you a good amount of time and a lot less hassle”
Celphtitled

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4. Espoma Co. Tree-Tone Plant Food

Espoma TR4 4-Pound Tree-Tone 6-3-2 Plant Food

Free shipping
Last update was on: May 23, 2022 1:44 pm
in stock
$13.28 $15.99

This nutrients blend by Espoma Co. contains 15 essential nutrients, without any toxic ingredients that could put the environment at risk. This low-environmental impact is partially why this nutrients solution is so good for outdoor growers. Espoma’s nutrients solution is best used after your plant is already sturdy and growing, rather than in its initial seedling/rooting phase. The slow release formula used in this nutrients solution will keep your plants healthy over time, while ensuring that your plants don’t get nutrient burn from being overfed.

Why choose this product?

Epsoma fertilizers have been shown to grow bigger plants that bloom very large. If you’ve never tried an epsoma fertilizer and want to experiment, try this product.

What other growers are saying:

“Most of my neighbors moved in around the same time as me but my trees are visibly a lot bigger and greener (3 years) than my neighbors’ trees. This stuff is the reason. It is very very good for crepe myrtles which are very picky about certain nutrient nutrients in fertilizers not being too high. Anyway, mine are doing beautifully as well as the rest of my trees. Make sure you read the package info…you need quite a bit of this per tree. Price on Amazon is great and this product is sometimes hard to find in the big box stores. Some nurseries carry it but why bother. If you are a prime member you get a great price plus quick free delivery!”
Barbandbob

“This came very highly recommended and I thought I’d finally give these products a try, starting with Tree Tone for my young redbud tree. Easy to use and I look forward to good results. Not sure why folks are worried about the odor – it does have an odor but no more or less than other organic fertilizer products, nothing to write home about.”

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5. FoxFarm Tiger Bloom Extra Strength 

Fox Farm Tiger Bloom Liquid Concentrate Fertilizer, 1-Pint

Free shipping
Last update was on: May 23, 2022 1:44 pm
in stock
$13.00

Tiger Bloom by Fox Farm is a potent nutrients solution with high levels of phosphorus to optimize your plant’s growth. One of the main advantages of this nutrients solution is to adjust the pH balance of your plants if it has gone out of whack, as well as reversing nutrients deficiencies. If your plant is growing more slowly, or looks smaller than you think it should, try using these nutrients. Tiger Bloom is also extremely fast acting, making it great for salvaging plants that are looking sickly and weak. This nutrients solution also offers an easy to follow schedule and set of instructions, so you can be confident that you’re feeding your cannabis plant the right amount at the right times.

Why choose this product?

If your plant is struggling to grow and you need to give it a quick and effective growth spurt, use this product.

What other growers are saying:

“Excellent Food! When used according to instructions.

“Work well. My plants like it but it’s really hard too compare with other product. The bottle go down quick when you use heavy dosage. But so far, so good. Delivery was quick too.”
Samuel Delisle

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 6. Clonex Rooting Gel

Clonex HDCLOQT Rooting Gel, 1 Qt, 32 oz

Last update was on: May 23, 2022 1:44 pm
in stock
$99.95

Clonex’s water based rooting gel isn’t exactly a nutrients solution, but it is highly effective if you’re trying to grow clones outdoors. This product, made in the United States, is even EPA registered and approved to be used on all medicinal crops and food crops. Clonex’s rooting gel is a rich combination of vitamins, anti-fungal components, hormones, and minerals, all of which are essential for successful and robust plant rooting and cell development.

Why choose this product?

This is the product you want to use if you’re looking to clone cannabis plants. This product lets you easily turn cuttings into clones by stimulating root growth.

What other growers are saying:

“Lasted forever!”
Evan Spies

“Very good formula love it thank you”
Patricia Eruiz

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7. Superthrive Plant Vitamin and Hormone Supplement

SUPERthrive VI30155 Plant Vitamin Solution, 1 Pint

Free shipping
Last update was on: May 23, 2022 1:44 pm
in stock
$29.66 $34.73

SuperThrive’s highly concentrated mixture of vitamins and hormones is a great product for strengthening your plant’s roots, and reducing the stress your plant goes through when being transferred from medium to medium (transplant shock. This is also a non-toxic item, which means it will not harm the environment. This makes it a great product to use on outdoor grows. SUPERthrive is also a company that has been around for 80 years, making them a reliable and trustworthy choice. Use this product on new seedlings, or on cuttings that you’re trying to get to take root. This supplement also encourages foliage growth in your plants.

Why choose this product?

If your cannabis plant is still in the seedling stage and you want to give it an early head start, try this product.

What other growers are saying:

“This stuff is great. Expensive but great. For all the new home growers out there. This is a highly recommended fertilizer.”
Thomas Kitchen

“Great product for veg stage of growth and go’s a long way.”
January Lanes

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8. Down to Earth Crab Meal

Down to Earth Organic Crab Meal Fertilizer Mix 4-3-0, 5 lb

Free shipping
Last update was on: May 23, 2022 1:44 pm
in stock
$21.42

Crab Meal by Down to Earth is an all natural, organic product, and an excellent source of nutrients. Since this product is completely organic, it’s perfect for outdoor use so you don’t contaminate your surrounding environment. One of the benefits of this product is to bolster beneficial microorganism populations that exist in the soil. Crab Meal is able to due this because of its high levels of chitin. Aside from cannabis, this product is often used to grow tomatoes, which have an almost identical growing process to cannabis (this is why “tomatoes” have become a sort of code-word on some cannabis growing websites, and books.)

Why choose this product?

If your plants are already extremely strong, try this product to give them an extra boost.

What other growers are saying:

“Great calcium source for tomatoes and peppers. I once considered some blossom end rot unavoidable, but the last two years I have had almost no container-grown tomatoes with BER, which I attribute to the addition of crab shell meal.Top-dressing containers and the base of plant stems has the added benefit of deterring slugs. Essential soilless mix amendment.”
John Brownit

“Watch out, you better have room in your garden because this will definitely make your vegetables grow like crazy. Only downside is if you are around ANY wildlife…they’re going to come digging!!!!”
Henry

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9. Miracle-Gro Nature’s Care Organic Blood Meal

Miracle-Gro Nature's Care Organic Blood Meal 3 lb.

Last update was on: May 23, 2022 1:44 pm
out of stock

This OMRI listed organic supplement is packed full of nitrogen, which will help your cannabis plant grow quickly and healthily. Nitrogen is so important because it helps your plant to photosynthesize (convert sunlight into energy). It’s for this reason that nitrogen is so important during a plant’s vegetative stage. This is also a great product to use if you notice the edges of your leaves turning pale or yellow. It’s recommended to use this supplement every two months throughout the growing season. But be warned: do not use this product on young seedlings or clones.

Why choose this product?

This product is jam packed with nitrogen, and therefore, is a great supplement if you suspect your plant needs more nitrogen. Growers have also found that this product can successfully keep pests and animals at bay when growing outdoors.

What other growers are saying:

“I had a problem w/some kinda critter or critters eating all the geen new leaves on my hydrangea & shasta daisie & almost every young green leaf that had emerged this spring already, so i read somewhere that blood meal would keep those lil rascals outa my young garden so i tried it & its amazing theyve not touched anything since, not to mention how much prettier everything turned out to be later on.I use blood & bone meal for anything that blooms, flowers, flowering trees etc, and they are always strong healthy plants w/beautiful blooms.I really didnt wanna get rid of my lil friends but i would rather they feast on something that didnt cost so much & break my heart everytime i look at the start of my beautiful flowers & and all the leaves have been cleaned off overnight. So its an all over great product!!”
Annie
 

“First off, I’m a newbie Gardner. My pepper plants were all turning yellow. I heard it could be nitrogen deficiency. I never tested my soil, I just added some of this, and all my plants turned back to green and even shot up about 2 inches in height the sane week. After that – I planted some peppers and a self watering container that I made myself, I decided to go ahead and just add some nitrogen to the soil when I was mixing the soil. Those plants seem to be doing great! 5 stars!”
Girly Hobbies
 

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10. Down To Earth Fish Meal

Down to Earth 723700 Fertilizer, 5 lb, Brown/A

Last update was on: May 23, 2022 1:44 pm
in stock
$22.88 $24.60

Fish Meal by Down to Earth provides high levels of nitrogen and phosphorus, making it a great nutrients solution to use during your plant’s vegetative stage of its growth cycle. This product words to promote the beneficial microbial life that exists in your soil, which help to fight off non-beneficial organisms and pests. Fish Meal also promotes the healthy and rapid growth of your plant’s roots. Ground-up fish (fish meal) sounds off-putting and strange, but fish meal has long been used by expert growers who want big results while still using an organic product. For cannabis growers, fish meal can increase the size of your buds. The eco-friendly nature of this product also makes it a great choice for outdoor growers.

Why choose this product?

This is the product you want to use if you like having massive buds.

What other growers are saying:

“This is a great nitrogen addition to the garden. I just broadcast it between plants and it keeps them really green. I like this better than fish emulsion and it has less smell too.”
Phil Farnsworth
 

“This has really helped my fruit trees that I just re-potted. So far so good. I’m on my 3rd year for my nectarine and peach trees but bought them more mature so I would say they’re around 5 years old. So far I am seeing a lot more fruit than the last year…bigger size as well. Not sure if its a direct result of this product or just that each year it will bear more fruit, but I feel like it helps it thrive more than what I have seen in past (with leaves and such too). I really like using this every time I re-pot anything and I put it near the roots. Long story short, I would recommend and will order again personally.”
Liz

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11. Root Naturally Azomite Rock Dust by Root Naturally

Root Naturally Azomite Rock Dust - 2 Pounds

Free shipping
Last update was on: May 23, 2022 1:44 pm
in stock
$13.99

This soil additive by Root Naturally is a great product to give your cannabis that little extra push, and really make it thrive. Root Naturally’s Azomite Rock Dust is chalk full of minerals, including iron, calcium, and magnesium. This is a great product to improve root growth, and for maintaining fertile soil over long periods of time. However, be warned: this is a long-term product, so don’t expect it to kick in right way. Regardless, Rock Dust is a great value and worth the buy if you’re interested in experimenting and trying to give your soil an extra push. Just look at the rave reviews other growers are giving it.

Why choose this product?

If you’re looking to grow season-after-season and really establish a fertile bed of highly effective soil, use this product. Growers swear by it.

What other growers are saying:

“This stuff is amazing. I read online (and of course everyone knows you can always believe what you read online) that this stuff helps plants grow, but what they didn’t say is that it works almost overnight. My plants went wild. I have already reordered and bought 10lbs this time. I love this stuff”
Fred
 

“THIS STUFF IS AMAZING!!! This spring… I had one blueberry bush that I thought was dead, and another that was sadly twiggy looking. Both had “not” grown much since I had purchased, planted, and fertilized them over the last three years. (While two of the “other” blueberry bushes, had already died) In a last ditch effort, I purchased and added some Azomite to the soil around my tiny dying/dead looking blueberry bushes. And they BOTH, quickly shot up and came to life! Even flowering, and bearing fruit… for the first time! UPDATE – Both of my blueberry bushes, have filled in and are wonderfully healthy 🙂 If I had only known, when I had purchased them!!!… AZOMITE ROCK DUST, ROCKS!”
 

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12. Advanced Nutrients pH Perfect Sensi 

Advanced Nutrients 6201-14AB pH Perfect Sensi Grow Part A+B, 1 Liter, Brown/A

Free shipping
Last update was on: May 23, 2022 1:44 pm
in stock
$32.55

These nutrients solutions by Advanced Nutrients come equipt with pH perfect technology, to help you get your pH balance just right. This product comes in two bottles—an A & B solution for different growing stages. Each bottle is one Litre. The main takeaway from this product—aside from its effectiveness and reliability as a fertilizer—is its ability to keep your pH levels perfect, which your plant craves.

Why choose this product?

Use this product if you have issues keeping your pH levels balanced, or if you suspect you won’t have much time to check your pH levels as often as you should. This product will do a lot of the work for you.

What other growers are saying:

“I am impressed with Advanced Nutrients Ph Perfect SensiGrow A & B nutrients ease of use and superior results when growing your own cannabis. The mixing instructions are very clear, simple to mix and application is as easy as a simple weekly watering! have been using Ph Perfect SensiGrow Part A (grow) & Part B (bloom) since Marijuana became legal in Massachusetts in 2016. I resulted higher than expected yield from the very first time I grew with Ph Perfect SensiGrow Part A & Part B!! These products are the only nutrients your Marijuana plants will ever need from seedlings to maturity.Feed Part A for Grow stage & Part B for Blooming. Easy to mix with water, easy to adminster to plant. Can be mixed weaker (seedlings) or stronger (mature, blooming) as your plant warrants.I used the product labels’ suggested mixing & water ratio & my plants performed spectacularly!! They produced a much higher than anticipated yield of beautiful lush bright green leaves and dense bud blooms! The smell alone was intoxicating!! The most beautiful plants I have ever seen! And a very tasty weed!! Thankyou!! I grew novicely in my bedroom closet with T8 flourescent shop lights and I have become fully entrusted to Advanced Nutrients Ph Perfect SensiGrow Parts A & B exclusively for all my nutrient needs! No mistakes if mixing ratio is followed correctly!! Highly recommend to first timers and the Grower elite!! Advanced Nutrients Ph Perfect SensiGrow Parts A & B are comparably and reasonably priced nutrients for your Marijuana Growing needs!! Very impressed by this product I have learned to trust faithfully! Thankyou SensiGrow!! Thankyou Amazon for carrying such a quality product!!”
Tania W

30 year master grower here there are no better nutrients to grow cannabis i have tried all the top brands i grow hydro without a ph or ppm etc.. pen no need for one micro and macro nutrients no deficiencys ever and the wet betty that breaks the surface tension is amazing”
Courtney n Bowman
 

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13. Ludicrous Nutrients Premium Marijuana Cannabis Fertilizer Eco Friendly 

Ludicrous Nutrients Big Ass Tomatoes Premium Gardening Fertilizer Nutrients Indoor or Outdoor Works with All Vegetables, Plants (1.5 lbs)

Last update was on: May 23, 2022 1:44 pm
out of stock

Why choose this product?

Try this product if you’re looking to produce lots of flower, or are looking to try out a new brand of nutrients.This nutrients solution by Ludicrous Nutrients features their signature blend of eco-friendly biostimulants  to help your cannabis plants thrive and produce lots of flower. While their formula is proprietary, the company admits they use kelp extract to administer the amino acids cytokinins and gibberallins, which will give you healthier, more robust plants. This solution also offers benefits to your plant’s root development by providing a mixture of carbohydrates, vitamins, and humic acid. Since this product is eco-friendly, it’s also a great way to grow outdoors while being conscious of the environment.

What other growers are saying:

“Fair price, good quality. Does the job.”
Jason

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Conclusion:

It’s easy to get lost in a sea of options when it comes to nutrients. But the reality is, your plant is going to do just great no matter which one of these nutrients solutions you choose. If you’re looking for something straightforward, go with the first solution we listed! But if you’ve been growing for a while and are looking to experiment, try any of these other great products, and see what works best for you. After all, part of the fun of growing is carving your own path by developing methods that work for you and your unique growing situation. Good luck, and more importantly,  have fun!

Want a second opinion on the best fertilizers for outdoor cannabis? Check out this great video by YouTuber THC HerbanGardener!

Want to learn more about the various terpenes that exist in cannabis? Read our comprehensive guide to cannabis terpenes!

Featured Image Credit: “Harvest Time” by Martijn is licensed under CC BY-SA 2.0

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