We believe in our products and so do our customers. If for whatever reason you are not 100% satisfied with your purchase we can provide a full refund. See our refund policy for more info. Your nutrients will ship in plain brown boxes without any branding. We have fast 1-2 day weekday shipping in Canada and the USA. We also offer worldwide shipping with DHL. Orders over $150 ship for free! Reefertilizer is the only three part cannabis grow system that includes the widest range of beneficial nutrients for your soil and your plants. Don’t risk the plants you love with all purpose fertilizers. Grow better plants with Reefertilizer. Start organic kelp meal coated with mycorrhizal spores, helps soil and plants in two major ways. Kelp feeds your seedling as well as beneficial soil bacteria in the soil with amino acids and trace elements. Helpful mycorrhizal fungi maximize water and nutrient uptake allowing plant roots to establish quickly.
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The Easiest Way To Grow Great Weed
Complete Nutrition For Cannabis Plants
Other 3 part fertilizers kits don’t provide micronutrients (like calcium and magnesium) and neglect the beneficial microbes and bacteria living in your soil.
Step-by-Step
Grow Guide.
Reefertilizer’s Three Step Cannabis Grow System
Step One Nurture a Living Soil
Step Two Robust Growth in Veg
When your plants have 3 to 4 sets of leaves, it’s time to give them their first substantial meal with Grow. Our blend high in nitrogen encourages fast stem and leaf development. This is the step where we build up the plant structure to support heavy resinous buds later on.
Step 3 Fuel Bud and Terpene Production
As plants transition to flower their nutritional needs change. Switching to Bloom provides base nutrients the plan needs to grow as well as essential nutrients for flower production. Enhanced with calcium and magnesium the Reefertilizer blend for flower will bring you bigger flowers and tastier buds.
Why We Use Reefertilizer
Quality
Only the best chelated fertilizer are blended into our powder. No cheap urea; a cheap nitrogen source that is less bio available.
Simplicity
No mixing and matching several bottle of liquid nutrients. One powder for veg and one for flower.
Flexibility
Great for use on indoor and outdoor cannabis, tomatoes, peppers, and more. Great results when used in soil, hydro, and everything in between.
Guidance
Learning how to grow great weed is a process. Our Guides, books, and tools will help you become a master faster.
Grow Like A Pro, Even When Your Not
What’s In The Bag and How Do I Use It?
Reefertilizer® Start
Reefertilizer Start feeds beneficial microorganisms in your soil and builds and symbiotic mycorrhizal network that improves water and nutrient uptake. Healthy soil gives your plants the right environment for optimum growth.
Add 3 scoops before transplanting and use Start as a top dressing once a month.
- Use with soil or coco mediums.
- Build and maintain a healthy living soil environment.
- Contains helpful trace elements, amino acids, and enzymes.
The Recipe For A Happy Soil
Ingredients
Organic Brown Sea Kelp Granules
Mycorrhizal spores (Rhizoglomus irregulare) 2 spores / g
Guaranteed Analysis
(A fancy way of saying total weight by volume)
| Total Nitrogen (N) | 2% |
| Available Phosphate | 1% |
| Potassium | 2% |
Mycorrhizae
This fantastic fungus grows symbiotically with all sorts of plants including cannabis. When these spores are close to the roots they begin to grow. Slowly a fungal structure grows that will protect roots from drought while improving nutrient and water uptake.
Brown Sea Kelp
Not high in NPK but packed with micronutrients and amino acids. Organic sea kelp will feed microbes in your soil. Happy microbes create an ideal environment for nutrient availability.
How To Boost Your Soil With Start
Add Before Transplanting
Mycorrhiza grows best when in direct contact with root systems. This friendly fungus protects roots and improves water and nutrient uptake.
Monthly Top Dressing
Kelp meal as a top monthly top dressing nourishes beneficial bacteria in your soil with amino acids and trace elements.
Reefertilizer® Grow
Reefertilizer Grow contains the essential nutrients required to establish strong stems, good leaf structure, and healthy root systems. Grow is a chelated synthetic nutrient that allows elements to be metabolized immediately, much faster than organic fertilizers.
These essential elements and added micronutrients help fuel many cell functions crucial to photosynthesis and cellular replication.
The Recipe For Plants in Veg
Guaranteed Analysis
(A fancy way of saying total weight by volume)
| Total Nitrogen (N) | 20% |
| Available Phosphate (P2O5) | 5% |
| Soluble Potash (K2O) | 10% |
| Magnesium (Mg) | 3% |
| Boron (B) | 0.02% |
| Copper (Cu) | 0.05% |
| Iron (Fe) | 0.10% |
| Manganese (Mn) | 0.05% |
| Zinc (Zn) | 0.05% |
How To Measure, Mix, and Feed Reefertilizer Grow
Add the recommended amount of Grow to water.
Mix Grow well.
Mix solution into water for feeding or reservoir.
Reefertilizer® Bloom
When cannabis plants begin to flower, their nutritional requirements change. Early on in flower, the plant will use its stored nitrogen for a quick growth spurt. After this growth spurt, your cannabis plants will need nutrients with a higher ratio of phosphorus and potassium. These elements will fuel flower production.
Reefertilizer Bloom also provides micronutrients such as calcium and magnesium. These two elements are common deficiencies and are proven to increase bud size and help terpene production.
Reefertilizer Bloom combines the essential nutrients for flowering cannabis, reducing the need for additional fertilizers.
The Recipe For Big Buds
Guaranteed Analysis
(A fancy way of saying total weight by volume)
| Total Nitrogen (N) | 5% |
| Available Phosphate (P2O5) | 30% |
| Soluble Potash (K2O) | 20% |
| Magnesium (Mg) | 3% |
| Boron (B) | 0.02% |
| Copper (Cu) | 0.05% |
| Iron (Fe) | 0.10% |
| Manganese (Mn) | 0.05% |
| Calcium (Ca) | 0.05% |
How To Measure, Mix, and Feed Reefertilizer Bloom
Add the recommended amount of Bloom to water.
Mix Bloom well.
Mix solution into water for feeding or reservoir.
There’s Nothing Easier Than Reefertilizer
Flexible Feeding Schedule
Reefertilizer likes to keep things simple. Feed your plants once a week and top up your soil with Start once a month.
Some folks split the weekly dose and feed their plants twice a week.
If you need more or less nutrient solution, just use the same ratio no matter how much water you’re using.
If you accidentally overfeed your plants, you can easily flush your medium with water.
Fool Proof Feeding
Reefertilizer Grow and Bloom contain the essential nutrients required to grow amazing cannabis. Both are chelated synthetic nutrients that allows elements to be metabolized immediately, much faster than organic fertilizers.
These essential elements and added micronutrients help fuel many cell functions crucial to photosynthesis and cellular replication.
There’s no need for additional fertilizers since this is an all in one powder. Ditch those messy liquid nutrients and dirty droppers.
Don’t risk your high value plants with all purpose fertilizers and save money compared to over complicated liquid nutrients.
Reefertilizer is the easiest and most effective cannabis feeding system.
Includes Digital Getting Started Guide
We created our products to make it easier for folks like you to start growing their own cannabis at home.
We provide our Beginner’s Guide to Cannabis Cultivation PDF free with each order and to our email subscribers.
Learn the basics of growing weed; from germinating seeds, caring for your plants through veg and flower, as well as processing that harvest you worked so hard to grow.
Written by Mike Drouin; an experienced cannabis grower and co-founder of Reefertilizer nutrients.
Feed Your Plant and Your Soil
Reefertilizer Start organic sea kelp feeds beneficial microbes in your soil. Mycorrhizal spores help grow fungal systems that increase water and nutrient uptake.
Reefertilizer Grow and Bloom are synthetic chelated fertilizers. Their nutritional elements are immediately available to plants once mixed into water. They speed up growth and stop deficiencies fast.
When all three parts of the Reefertilizer grow kit are used together you can greatly improve your plant’s growth rate.
Here’s What Our Customers Think of The Reefertilizer Grow Kit
Grow Weed Easily
Reefertilizer was designed to make home cultivation easier for beginners and simpler for advanced growers. Our 3 piece kit will provide cannabis plants with their nutritional needs from seed to flower for up to 8 plants.
Using Less Plastic
Reefertilizer dry nutrients are lighter to ship and require less packaging. Our products are vegan and contain trace heavy metals. Just one bag can last multiple grows.
For Less Money
The Reefertilizer Kit replaces other feeding programs with multiple bottles and expensive soil amendments. Only the highest quality nutrient sources are added to our blends. No cut corners just the best for less.
Why We Created Reefertilizer
We believe in a world without a stigma on cannabis. This is why our branding is cannabis positive and not trying to hide from the fact we love to grow weed. From treating pain to just having fun, cannabis is an amazing plant that everyone should have the right to grow. We’re here growing with you. Just check out these amazing plants and growers Reefertilizer has helped to empower!
Grow More For Less
How Long Does The Reefertilizer Grow Kit Last?
Our trio of nutrients should be able to feed up to 8 plants from seed to flower. Grow and Bloom can mix over 1000L of nutrient solution. One bag of Start will provide 33 applications.
Our dry powder nutrients can be stored in a cool dry place to be used year after year without losing potency.
When compared to similar liquid and dry nutrients grow kits, Reefertilizer is cheaper, has a longer shelf life, and includes nutrients for your soil which others don’t.
Let's Compare Complete Cannabis Nutrient Kits...
| Nutrient Kit | GH Flora Series | FF Dry Nutrient Kit | Reefertilizer | Humboldt Starter Kit |
| Base Nutrients | YES | YES | YES  | YES |
| Micronutrients | NO | YES | YES | YES |
| CalMag | NO | NO | YES | YES |
| Soil Boost | NO | NO | YES | NO |
| Price | $48.75 | $50.99 | $84.95 | $119.99 |
Prices based on Amazon 2/20/2024
Reefertilizer is the best value cannabis nutrient kit around!
Our goal was to create a complete nutrient kit from seed to flower while also providing beneficial nutrients and microbes for your soil.
We do this by combining a perfect blend of water soluble macro and micronutrients for veg and flower. Other brands split up these nutrients to get you to buy more stuff.
We are also the only ones to include mycorrhizae and kelp meal for improving soil health.
Common Questions and Answers
What makes Reefertilizer different from “other brands”?
Our goal at Reefertilizer is to get more folks growing their own cannabis. Reefertilizer provides easy-to-use and affordable nutrients along with straightforward guidance and support.
We designed our products to be lighter and have less packaging than our competitors. We’re happy to provide a 30-day return policy if you’re not happy with our products.
We’re not “big fertilizer”, we’re just three guys who love growing and using cannabis.
Can I pre-mix these nutrients?
Because these are chelated nutrients they don’t do well being mixed into water and stored for long periods of time. The elements within the solution can react with each other and lower the effectiveness of the fertilizer. A few days is okay, but anything longer than a week might not be a good idea.
Are synthetic fertilizers harmful?
Microbes in soil feed off the same elements provided by organic or synthetic nutrients. Avoiding over-fertilization and maintaining the right soil pH will keep soil microbes happy. Organic inputs like Reefertilizer Start will feed the microbes in your soil.
When overused, synthetic fertilizers can end up in wastewater adding to agricultural runoff. That’s why having healthy soil is important. In healthy soil, plants are able to absorb more nutrients meaning you end up with less in your waste runoff.
Reefertilizer® Start – Kelp Meal + Mycorrhiza
Reefertilizer Start is a soil amendment and top dressing made from organic sea kelp granules and mycorrhizal spores.
Organic sea kelp is packed with beneficial amino acids and enzymes. Mycorrhizal fungus improves the plant’s ability to absorb water and nutrients.
Reefertilizer® Grow – Water Soluble Nutrients For Plants in Veg
When your weed plants have their first 3-4 sets of leaves, you can begin feeding them Reefertilizer Grow.
High in nitrogen, our Canadian made powder fertilizer blend contains the necessary micro and macronutrients crucial for stem and leaf growth during veg.
- Easily mixes into water for weekly feedings.
- Chelated nutrients are immediately available to your plants. Quickly eliminating nutrient deficiencies.
- Easy to flush accidental overfeeding.
Reefertilizer® Bloom – Powerful Flower Powder Nutrients
Switch your plants to a weekly feeding of Reefertilizer Bloom when you first see signs of flower or switch your light schedule.
With a NPK ratio perfectly balanced for flowering plants, Reefertilizer bloom will encourage flower growth and terpene (essential oil) production.
Perfect for your indoor and outdoor plants no matter their size or cultivar.
- Enhanced with micronutrients like calcium and Magnesium.
- Indefinite shelf life when stored correctly.
- High phosphorus and low nitrogen ratio.
Need a Little Help Getting Started?
When you sign up or make a purchase you will get a download link for our Beginner’s Guide to Cannabis Cultivation.
Along with this helpful guide, you will receive product updates, discounts, and our latest articles about growing and processing cannabis at home!
- Seed Germination
- Setting up a Grow Room
- Grow Techniques for Getting Larger Yields
- How to Cure and Dry Cannabis
Much More…
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This is the easiest and best way to feed your plants, the mixture of chemicals and organic, organisms and bacteria to take care of your babies the right way , easy mixing ,easy measuring and dosage to give your plants just the right nutrients at the right time to produce amazing results
The plants I have added have three to four more weeks of flowering yet but they look and smell amazing I started her flowering at just 6+ weeks of veg you can keep them small and start flowering with photo period strains depending upon how much room you have happy growing ?
I have used many other awesome products however, Reefertilizer this 3 step feeding program is in a class of its own, is an absolute fail proof product… any experience level can grow amazing cannabis with ease if this is your absolute first time or you’re 100th successful time. Not to mention the customer service and the information available on how to use these products is second to none. This is an absolute must have in your growing arsenal. I can’t stress enough, it takes out all the guess work of having measuring nutrients like Cal mag, pk ,adding stackers or extra soil amendments it’s all right there in this 1-seed-2-veg-3-bloom-step program.. there’s the starter which is absolutely excellent for starting seedlings/clones and young plants and then for the veg stage there’s a veg fertilizer that does exactly what it’s supposed to do and grows amazing healthy plants and prepares them for the flowering and guess what when they get there there’s a bloom product.
Don’t take my word or anybody elses let reefertilizer 3 step speak for itself!
I am thrilled with these nutrients. They are easy to use and the results are great. I grew this Girl Scout Cookie Autoflower outside in 69 days – seed drop to chop. She’s curing in the jar and smells amazing. Can’t wait to see my next crop from my indoor tent using Reefertizer nutrients.
very good, after 15 or 16 tries, finally getting something successful.
Excellent products and very simple to use with great results