Reefertilizer® Bloom Flowering Nutrients for Cannabis

$27.95 CAD

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Nutrient blend designed for flowering cannabis plants.
Promotes dense bud growth and terpene production.
Enhanced with Calcium and Magnesium.
Vegan and planet friendly chelated nutrients.


Save 20% When You Buy 5 or More.

The Powerful Powder For Flower

best nutes for flowering in soil
Solo Cup
Reefertilizer Indoor Cannabis fertilizer

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 1-35ml scoop mixed into 4L of water
Flower Weeks 4-810ml scoops mixed into 4L of water
Additional Flower Weeks10ml scoops mixed into 4L of water
1-2 weeks before harvestFlush 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 Nutrients for Cannabis in Flower

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.

Mike of Reefertilizer inspecting a cannabis plant

Written by Mike Drouin; an experienced cannabis grower and co-founder of Reefertilizer nutrients.

Beginners guide to cannabis cultivation

What Our Customers Think Of Reefertilzer Bloom

4.9
Based on 176 reviews
1-5 of 176 reviews
  1. 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
    Ken

    Image #1 from Ken Martin
  2. Very satisfied. Looking forward to getting the whole system for next spring

    Image #1 from James
  3. Image #1 from Robert Adams
    Image #2 from Robert Adams
  4. Great product. Used both bloom and grow. Worked amazing on my photos as well as the autos.

    Image #1 from Anonymous
    Image #2 from Anonymous
  5. Image #1 from Chris Curiel

Common Question and Answers

Organic and synthetic fertilizer

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.

The Reefertilizer difference

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 to feed cannabis plants

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.

Measure cannabis nutrients

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.

Mixing Cannabis Nutrients

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…

155 reviews for Reefertilizer® Bloom Flowering Nutrients for Cannabis

Customer Images

Image #1 from Ken Martin
Image #2 from Robert Adams
Image #3 from Robert Adams
Image #4 from Anonymous
Image #5 from Anonymous
Image #1 from Ken Martin

Ken Martin

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 Ken

Image #2 from Robert Adams

Robert Adams

Image #3 from Robert Adams

Robert Adams

Image #4 from Anonymous

Anonymous

Great product. Used both bloom and grow. Worked amazing on my photos as well as the autos.

Image #5 from Anonymous

Anonymous

Great product. Used both bloom and grow. Worked amazing on my photos as well as the autos.

Image #6 from Kelley Carlson

Kelley Carlson

Best bud I’ve ever grown

Image #7 from Eddie D.

Eddie D.

Will continue using product

Image #8 from Steven P.

Steven P.

it has helped me grrow bigger and dense buds. really struggled with that before using Bloom

Image #9 from Jeff M.

Jeff M.

It does everything it’s supposed too

Image #10 from Paul

Paul

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.

Image #11 from Paul

Paul

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.

Image #12 from Paul

Paul

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.

Image #13 from Paul

Paul

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.

Image #14 from Rob E.

Rob E.

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!!!

Image #15 from Rob E.

Rob E.

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!!!

Image #16 from Rob E.

Rob E.

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!!!

Image #17 from Rob E.

Rob E.

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!!!

Image #18 from Edward

Edward

Nice bud fattening. Will buy again

Image #19 from Anonymous

Anonymous

Grow good weed indoor or out!

Image #20 from Anonymous

Anonymous

Grow good weed indoor or out!

Image #21 from Anonymous

Anonymous

Grow good weed indoor or out!

Image #22 from Anonymous

Anonymous

Grow good weed indoor or out!

Image #23 from Anonymous

Anonymous

Grow good weed indoor or out!

Image #24 from RYAN

RYAN

Nice when I can get over a pound of flower from one plant.

Image #25 from E-SCOTT

E-SCOTT

Image #26 from Jeffrey Parker

Jeffrey Parker

Thick heavy buds with tons of resin..it's hard to chop up it's so nice and sticky

Image #27 from Marty

Marty

would never use anything else

Image #28 from Marty

Marty

would never use anything else

Image #29 from Marty

Marty

would never use anything else

Image #1 from Ken Martin
Image #2 from Robert Adams
Image #3 from Robert Adams
Image #4 from Anonymous
Image #5 from Anonymous
Image #6 from Kelley Carlson
Image #7 from Eddie D.
Image #8 from Steven P.
Image #9 from Jeff M.
Image #10 from Paul
Image #11 from Paul
Image #12 from Paul
Image #13 from Paul
Image #14 from Rob E.
Image #15 from Rob E.
Image #16 from Rob E.
Image #17 from Rob E.
Image #18 from Edward
Image #19 from Anonymous
Image #20 from Anonymous
Image #21 from Anonymous
Image #22 from Anonymous
Image #23 from Anonymous
Image #24 from RYAN
Image #25 from E-SCOTT
Image #26 from Jeffrey Parker
Image #27 from Marty
Image #28 from Marty
Image #29 from Marty
4.9 Rating
1-5 of 155 reviews
  1. 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
    Ken

    Image #1 from Ken Martin
  2. Image #1 from Robert Adams
    Image #2 from Robert Adams
  3. Great product. Used both bloom and grow. Worked amazing on my photos as well as the autos.

    Image #1 from Anonymous
    Image #2 from Anonymous
  4. Best bud I’ve ever grown

    Image #1 from Kelley Carlson
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Reefertilizer Bloom Nutrients for Cannabis in Flower
Reefertilizer® Bloom Flowering Nutrients for Cannabis