🌱 Ships in 2 working days · Sign up for the big holiday sales →

a Pot for Pot

Shop › Flowering Booster

1-0-3 bloom foodKelp & fish6 waterings

Bloom Booster Plant Food 1-0-3 – Flowering Booster, 2 oz

Supercharge your grow with our fortified Flowering Booster.  Packed with our own all natural, nutrient rich formula, our flower booster will help your plant reach its max potential and sprout big, beautiful, bodacious buds. Add 2 teaspoons (10 ml) of Flower Booster to your watering can (1 Gallon) and mix once per week beginning in the 2nd week of flowering until your plant is harvested. 2 Oz (60 ml) per bottle

$9.95

✓ Ships in 2 working days✓ Email us any time✓ Secure card checkout

Pairs with

Superb Soil
Our organic super soil feeds your plant from seed to harvest. Flowering Booster is an optional weekly extra.

Shop Superb Soil

Why Growers Love Flowering Booster

Flowering Booster 1-0-3 plant food, 2 oz bottle with the a Pot for Pot label

Made for flowering

A liquid bloom food for the flowering stage, with a little nitrogen and more potassium (1-0-3).

Illustration: kelp, fish protein and molasses, the ingredients in Flowering Booster

Kelp, fish and molasses

Made from kelp extract, potassium hydroxide and fish protein, with 22% molasses and 5% humic acid.

Pouring Flowering Booster plant food into a green watering can

Easy weekly dose

Two teaspoons in a gallon of water, once a week. Plain water the rest of the week.

Back label of the Flowering Booster bottle with mixing directions

Real label numbers

Total nitrogen 1% and soluble potash 3%, printed right on the back label.

How to Use Flowering Booster

Illustration: 2 teaspoons (10 ml) of Flowering Booster measured into 1 gallon of water

1. Measure

Add 2 teaspoons (10 ml) to 1 gallon of water and mix.

Illustration: a flowering plant next to a calendar marking week 2 of flowering

2. Start in week 2

Start in the 2nd week of flowering. Outdoors, that is around the end of August.

Illustration: a calendar with one feeding day marked each week, plain water between

3. Once a week

Water with it once a week until harvest. Use plain water the rest of the week.

Illustration: one 2 oz bottle of Flowering Booster makes 6 waterings

4. Six waterings

One 2 oz bottle is six 10 ml doses: enough for six weekly feedings.

What You Get

2 oz (60 ml) bottle6 weekly waterings1-0-3 analysisKelp, fish protein, molasses

Flowering Booster 1-0-3 plant food, 2 oz bottle with the a Pot for Pot label

Ships in 2 working days from the USA. Keep it out of reach of children and pets; the label says do not ingest.

Flowering Booster Questions

What is a bloom booster?

A bloom booster is a plant food you add while a plant is flowering. Flowering Booster is ours: a liquid made from kelp extract, potassium hydroxide and fish protein, with molasses and humic acid. The label calls it "Quality Microbe Food".

What does 1-0-3 mean?

It is the N-P-K analysis on the label: 1% total nitrogen, 0% phosphate and 3% soluble potash (K2O). So it brings a little nitrogen and more potassium.

When should I start a bloom booster?

In the 2nd week of flowering. For plants growing outdoors in the sun, that is around the end of August. Keep using it once a week until harvest.

How much do I use?

2 teaspoons (10 ml) in 1 gallon of water, once a week. Use plain water the rest of the week. A 2 oz bottle lasts 6 waterings.

What is in it?

Kelp extract, potassium hydroxide and fish protein, plus 22% molasses and 5% humic acid. The analysis is 1-0-3: 1% nitrogen and 3% soluble potash.

Do I need it with Superb Soil?

No. Superb Soil already holds the nutrients your plant needs from seed to harvest, and you can grow with water alone. Flowering Booster is an optional weekly extra during flowering.

How long does one bottle last?

One 2 oz (60 ml) bottle is six 10 ml doses. At one feeding a week from week 2 of flowering, that covers about six weeks of bloom.

How should I store it?

Out of reach of children and pets, like any garden product. The label says do not ingest. Close the cap after each use.

You might also need

See all grow supplies →

For adults 21+ where home growing is legal. Home-grow rules differ by state and change often; check your state's official rules. Not legal advice.

Flowering Booster 1-0-3 plant food, 2 oz bottle with the a Pot for Pot label
Bloom Booster Plant Food 1-0-3 – Flowering Booster, 2 oz
$9.95
a Pot for Pot gift card with the flower pot logo

Confirm Your Age

Meme: a huge cannabis plant in an a Pot for Pot fabric pot. Text: When you finally grow up, and realize you can grow your own.

You must be 21 years old or over to enter our website.

By entering this site you are confirming you are over 21 years old and agreeing to the Terms and Conditions