The Powerful Powder For Flower
The All-in-One Powder For Cannabis in Flower
Reefertilizer® Bloom is the final step of our cannabis feeding program. Powerful chelated fertilizer provides immediately available nutritional elements to your plants.
Enhanced with calcium and magnesium, Reefertilizer Bloom will help fuel flower development and terpene production. One bag will help grow up to 8 plants.
- High in phosphorus and potassium
- Highest quality chelated nutrients
- Enhanced with Calcium & Magnesium
- Great for soil or autopot type systems
The Easiest Way To Feed Flowering Cannabis
Reefetilizer Bloom makes feeding your plants during their flowering phase an absolute breeze. No more mixing A and B liquids! All you need for big terpy buds is in this one powder.
Start feeding your plants Reefertilizer Bloom when you switch lights to 12/12 indoors or when preflowers appear outdoors.
| Flower Weeks 1-3 | 5ml scoop mixed into 4L of water |
| Flower Weeks 4-8 | 10ml scoops mixed into 4L of water |
| Additional Flower Weeks | 10ml scoops mixed into 4L of water |
| 1-2 weeks before harvest | Flush plants with plain water |
How to Mix & Apply Reefertilizer Bloom
Add the recommended amount of Bloom to water.
Mix Bloom Well.
Feed your plants or add to reservoir.
Note: Stabilizers in the Bloom powder might not fully dissolve. These will break down naturally and won’t harm your plants or irrigation system.
What’s In The Bag?
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 short period , your cannabis plants will need nutrients with a higher ratio of phosphorus and potassium. These elements will fuel flower growth.
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. Each bag feeds up to 8 plants.
Guaranteed Analysis
(A fancy way of saying total weight by volume)
| Total Nitrogen (N) | 5% |
| Available Phosphate (P2O5) | 30% |
| Soluble Potash (K2O) | 20% |
| Calcium (Ca) | 4% |
| Magnesium (Mg) | 3% |
| Boron (B) | 0.02% |
| Copper (Cu) | 0.05% |
| Iron (Fe) | 0.10% |
| Manganese (Mn) | 0.05% |
Get All The Guidance You Need
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 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.
What Our Customers Think Of Reefertilzer Bloom
Customer Images
Common Question and Answers
Is Bloom Synthetic? Is that bad?
Reefertilizer Bloom is a synthetic fertilizer. Plants and soil microbes feed off the same elements provided by either organic or synthetic nutrients. A healthy living soil will maximize the amount of nutrients your plants can absorb.
Over-fertilization can be a issue but is easily fixed by flushing plants with water.
Bloom contains the highest quality chelated nutrients which are immediately available to plants and reduce wasted nutrients. Lower quality nutrients brands contain urea and other forms of nutrients that are not as easy to absorb and can end up in waste water runoff.
What makes Reefertilizer Bloom different from other bloom boosters?
Other bloom boosters usually need to be used with a full NPK fertilizer. Reefertilizer Bloom has a NPK ratio perfect for cannabis in flower as well as all the other micronutrients in bloom boosters.
Enhanced with calcium and magnesium, Reefertilizer Bloom reduces the number of additional inputs you might need.
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 and we’re happy to offer 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.
When do I start feeding my plants Reefertilizer Bloom?
When you start to see flowers begin to form around the nodes (where the branch meets the stem) you can switch to feeding your plants Bloom. For autoflowers, this is usually 3 or 4 weeks in. For outdoor plants, this is usually around July or August in the northern hemisphere.
How much do I feed my plants?
Start with 1 scoop (5ml) for every 4L (1 gallon) of water. Feed each plant weekly with enough of this solution to fully saturate the soil and have a bit of runoff. You can water your plants as needed in between feedings. Some folks split the dose and feed twice a week. Both work fine, pick whichever method is easier for you.
When I mix the Bloom powder it doesn’t dissolve completely, what gives?
What you’re seeing are left over stabilizers in the powder. These stabilizers are inert, completely safe, and won’t harm your plants or injectors. They will slowly break down over time in your soil or coco mediums.
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.
Get More From Your Plants
Reefertilizer Bloom Is Just One Part of a Balanced Diet
Reefertilizer was designed to make growing amazing weed at home easier than ever. The Reefertilizer grow kit will feed your soil as well as up to 8 plants with no need for additional inputs.
When all three are working together a successful harvest is easy to achieve.
You Might Also Be Interested In…
158 reviews for Reefertilizer® Bloom Flowering Nutrients for Cannabis
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Check Ted Farmer on YouTube
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Buds seemed to fatten up nicely during the Bloom stage. Can’t wait to start my 2nd grow with this Reefertilizer product.
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would never use anything else
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This Bloom gives you a great yield and flushes out very quickly.
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Ditto
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Good product.
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Just as easy to use as the grow
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I’ve started using the bloom fertilizer on my indoor plants and I can see the size of the buds is already bigger than crops before at this stage. Will always use this product!!
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Very happy with the product so far … First time using powder nutrients and haven’t had a chance to use the bloom nutes yet. The grow nutes however have noticeably been very well received by the plants and have no issues with nutrient burn.
Will definitely purchase again!
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Very happy so far! I started using the nutrients on June 18th and my tallest plant was about 18″.
Its Aug and my tallest are now over 72″! I really found the plants produced alot more consistent/ hearty branches after starting the system.
I’ve got a few on the Bloom now and are stacking up nicely!
Happy growing!
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Thick heavy buds with tons of resin..it’s hard to chop up it’s so nice and sticky
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Bloom also works better than liquid fertilizers.
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I have used this system for 2 seasons now for both indoor and outdoor on 8 different strains both indica and sativa. Simple and easy to use. Perfect crop each time.
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Great bloom fertilizer
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Very easy to use with simple instructions
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Very potent stuff. I followed the directions for dirt and got very good results. The product seemed to speed up the process by about a week. Great value and a good product.
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British Columbia, Canada
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Ontario, Canada
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Alberta, Canada
Got my heaviest and densest buds yet. Exactly what I was looking for.
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Ontario, Canada
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Ontario, Canada
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The ladies love it!
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Easy to use from mixing to application. Great customer support.
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This stuff is great ?? works wonderful plants absolutely love it
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Happy plants!
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Lots of big healthy buds. Thanks Mike
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Haven’t gotten there yet but I’m sure it’ll be as good as the rest of your products
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Hoping for a great result…I’ll let ya know
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Haven’t tried it yet but should be great like your other products
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Great stuff
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easy to use
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Good stuff! Could almost see the buds swelling after weekly applications. I will be getting more for next year!
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Greaat fertilizers…just placed my 3rd order.
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The addition of Calcium and Magnesium to the formula makes this a complete plant food that promotes heavy blooming. Easy to use, follow the instructions. Just be sure to use hot water to dissolve, or leave it sit overnight.
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Plans in veg love this stuff
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Nice when I can get over a pound of flower from one plant.
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It really made a difference in the plants
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If the bloom helps like the grow does I will be sooo happy
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Grow good weed indoor or out!
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Nice bud fattening. Will buy again
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I’m so glad I bought the Bloom formula! The plants are amazing!! It was so easy to follow the instructions and the guidance through the PDF was stellar!! I feel confident now and will be purchasing the Start, Grow and Bloom! If just the bloom worked this well, imagine what the plants will look like next year! Thank you!!!
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Great product. Used both bloom and grow. Worked amazing on my photos as well as the autos.
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The Bloom and Grow are products that are simple to use and get great results! I’m not a professional, but everyone says I have professional buds.
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It does everything it’s supposed too
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First harvest ever, (I’m a late bloomer) but results were fantastic. Could easily see the bud improvement day to day.
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Best stuff I ever used. These nutrients kept my plant alive and no yellow leaves at harvest time even after flushing with water only for the last two weeks. My buds were nice and big and firm and smelled great too. I credit my grow to the nutrients from this website REEFERTILIZER and will be using these nutrients for as long as I’m around lol and their around as well. Now I’m smoking the finished product and the smell and flavor of the buds are spot on I highly recommend these nutrients they are safe and do the job they are supposed to and easy to use as well.
Thanks Guys
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Great Canadian product, excellent results and even better customer service.
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Great fertilizer for the flowering period, cant go wrong with the easy to follow directions
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I’ve used Reefertilizer Bloom for the last three growing seasons and couldn’t be happier with the results!
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This and your skill will produce quality flower.
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it has helped me grrow bigger and dense buds. really struggled with that before using Bloom
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Simply the best you can buy
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Awesome Nutrients…the smell and potency are spot on plus a ton of resin on the plants as well a definite must buy for cannabis growers everywhere!!
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Helped my plants grow nice big resinous buds…super sticky weed it is… I’m absolutely 100% satisfied with this and the Grow nutrients as I’ve been using these products for the last 3 years and that’s why I keep coming back.
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Will continue using product
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Best bud I’ve ever grown
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Very satisfied. Looking forward to getting the whole system for next spring
This product is a must for healthy plants. Will use it again next growing season. If you’ve never tried it you’re missing out.
Used this last season with fantastic results.