Click on image to zoom

Gaia Green Power Bloom Fertilizer 2-8-4 - Gaia Green - Happy Hydro

Gaia Green Power Bloom 2-8-4 | Happy Hydro

High phosphorus for the flowering stage. Same simplicity as All Purpose, tuned for bloom.

Name: Gaia Green Power Bloom Fertilizer 2-8-4
Brand: Gaia Green
SKU: GAGPB500GP
Price: 12.95 USD
Availability: OutOfStock
Rating: 5.0 (123 reviews)

Gaia Green Power Bloom 2-8-4 is the flowering counterpart to All Purpose 4-4-4. Where All Purpose handles vegetative growth, Power Bloom delivers 8% phosphorus and 4% potassium from 14 organic ingredients to support flowering, fruiting, and root development. Top-dress once a month during bloom, or blend it with All Purpose at the transition. Organic growers have relied on this exact two-product system for over 20 years.

CDFA Certified Organic Ecocert Canada Approved GMO-Free Ingredients

Free shipping on orders over $49

30-day returns on all orders

Serving growers since 2006

See it in action

How to use Gaia Green dry amendments

Why growers switch

Liquid PK boosters vs. Gaia Green Power Bloom 2-8-4

Liquid PK Boosters

Another bottle to buy on top of your base nutrients
Measure and mix at every watering during flower
Easy to overshoot and lock out other nutrients
Salt-based P and K build up and require flushing
No secondary nutrients or trace minerals included
Feeds the plant directly, bypasses soil biology

Gaia Green Power Bloom

One product replaces PK booster, bloom base, and supplements
Top-dress once a month, water normally in between
Slow-release formula is forgiving, hard to burn at recommended rates
Organic inputs, no salt buildup, no flush required
4.5% calcium, 2.3% sulfur, plus trace minerals from rock dust and greensand
Microbes break down ingredients on demand, nutrients stay in the root zone

What makes it work

High P, moderate K, low N: built for the demands of flower

8% phosphorus from four different sources 2% N, 8% P, 4% K

Bone meal, mineralized phosphate, fishbone meal, and rock phosphate each release at different speeds. That spread ensures phosphorus availability from the first week of flower through the final weeks of fruit set.

Low nitrogen, mostly slow-release, to avoid excess foliage in bloom

Only 2% total nitrogen, and 75% of that is water-insoluble (the opposite of All Purpose). This means a slow, steady background feed of nitrogen without the vegetative push that flowering plants don't need.

4.5% calcium and 2.3% sulfur already included

Calcium demand spikes during flower, especially around weeks 3 to 5. Bone meal, fishbone meal, and gypsum provide it here without adding a separate cal-mag supplement.

Glacial rock dust and basalt for trace minerals during heavy production

Flowering and fruiting plants pull hard on iron, manganese, and magnesium. Both rock dusts supply these trace elements along with dozens of micronutrients that single-ingredient bloom boosters miss.

Insect frass and humic acid keep the soil food web active through harvest

Late in flower, soil biology can slow down as organic matter gets consumed. Insect frass and humic acid act as food for beneficial microbes so nutrient cycling doesn't stall when plants need it most.

Pairs with All Purpose 4-4-4 for a complete veg-to-harvest system

Use All Purpose 4-4-4 during veg, then transition to Power Bloom at the flip. The two products share the same application rates, so switching is just swapping which tub you reach for.

Specs

Guaranteed analysis and product details

NPK Ratio

2-8-4

Nitrogen Breakdown

0.5% water-soluble, 1.5% water-insoluble

Secondary Nutrients

4.5% Calcium, 2.3% Sulfur

Sizes Available

500g, 2 kg, 10 kg, 20 kg

Form

Fine powder blend (non-granulated)

Certifications

CDFA Organic, Ecocert Canada

Origin

Made in Canada (British Columbia)

Storage

Cool, dry, out of direct sunlight

Full Ingredient List (14 ingredients)

Bone meal, mineralized phosphate, fishbone meal, rock phosphate, mined potassium sulphate, glacial rock dust, insect frass, feather meal, basalt rock dust, kelp meal (Ascophyllum nodosum), humic acid, gypsum, greensand, blood meal.

Amendment calculator

Gallons of soil

Method

Growth stage

What the math looks like

Monthly top-dressing in bloom

At 1 tbsp per gallon, a 5-gallon pot uses 5 tbsp per month. A 2 kg tub gives you roughly 7 months of monthly top-dresses for a single 5-gallon pot.

Pre-mixing flower soil

At 3 tbsp per gallon, one 2 kg tub pre-mixes about 60 gallons. That fills twelve 5-gallon pots at under $1.10 per pot.

Full cycle cost (veg + bloom)

One tub of All Purpose ($10.95) plus one tub of Power Bloom ($12.95) covers a full veg-to-harvest cycle for multiple containers. The bundle saves even more.

Compared to liquid bloom boosters

A bottle of Botanicare Hydroplex runs about $20 for 1 quart and still requires a separate base nutrient. One tub of Power Bloom at $12.95 handles the entire flowering stage on its own.

How to use it: transition, bloom, and re-amend

1

Transition at the flip with a 50/50 blend

When plants begin showing flowers, top-dress with a 50/50 mix of All Purpose and Power Bloom at 1 tablespoon per gallon of soil. This provides the phosphorus boost flowering needs while keeping some nitrogen available for the stretch.

2

Switch to 100% Power Bloom for peak flower

After the first top-dress, go full Power Bloom for the remaining bloom applications. Top-dress 1 tablespoon per gallon every 3 to 4 weeks. Scratch lightly into the surface and water in.

3

Stop top-dressing 2 to 3 weeks before harvest

Because dry amendments take about a week to break down, stopping 2 to 3 weeks before harvest lets the plant use what's already in the soil without adding more. No flush protocol needed with organic inputs.

4

Re-amend with All Purpose for the next cycle

After harvest, pull the root ball and re-amend with All Purpose 4-4-4 plus worm castings to reset the soil for veg. Let it cook 2 to 4 weeks, then plant again.

Available sizes

Pick your size and build a complete system

Sizes we carry

500g (1.1 lbs): Trial size, enough to top-dress a few pots for one cycle
2 kg (4.4 lbs): Most popular for home growers, pre-mixes ~60 gallons of soil
10 kg (22 lbs): Multi-cycle supply for serious home or small commercial grows
20 kg (44 lbs): Best per-pound value, covers large gardens or commercial operations

Works with

Media: Pro-Mix, Fox Farm Ocean Forest, Roots Organics, coco coir, peat-based mixes, garden soil
Plants: Tomatoes, peppers, squash, cucumbers, fruiting trees, flowering ornamentals, and any crop that fruits or flowers

How many tubs do I need? A single 2 kg tub top-dresses a 5-gallon pot monthly for about 7 months. Running four 5-gallon pots through a 10-week flower? One 2 kg tub covers it.

Pair with for a complete system

All Purpose 4-4-4: Use during veg, transition to Power Bloom at the flip. Same application rates.
All Purpose + Power Bloom bundle: Both products at a better price than buying individually. Covers veg through harvest.
Gaia Green Worm Castings: Add a scoop with every top-dress to keep microbial activity high through late flower.
Full system: Check out the Soil Re-Amend Kit with All Purpose, Power Bloom, Worm Castings, Mykos, and Azos

Not sure what you need? Call or email and we'll help you figure out the right combination and sizes for your setup. 716-217-0353 / help@happyhydro.com

Questions

Frequently asked questions

Can I use Power Bloom by itself for the entire grow, or do I need All Purpose too?

Power Bloom is designed for the flowering stage. It has only 2% nitrogen, which isn't enough to carry most plants through vegetative growth. For a complete veg-to-harvest system, start with All Purpose 4-4-4 during veg and switch to Power Bloom when flowering begins. Some growers pre-mix a small amount of Power Bloom into their starting soil alongside All Purpose so phosphorus is available early for root development, but the majority of Power Bloom usage happens during flower.

What ratio of All Purpose to Power Bloom should I use at the transition?

Most growers start with a 50/50 blend at the first sign of flowering, then move to 100% Power Bloom for subsequent top-dresses. For autoflowers, some growers start with 70/30 All Purpose to Power Bloom during early veg, then shift to 50/50, then to 70/30 Power Bloom to All Purpose in late bloom. The exact ratio depends on your genetics and how heavy a feeder the plant is. If you're unsure, 50/50 at the transition and 100% Power Bloom after that is the simplest approach.

Does this work for tomatoes, peppers, and other fruiting plants?

Yes. Any plant that flowers and fruits benefits from the higher phosphorus and potassium in this blend. Tomatoes, peppers, squash, cucumbers, strawberries, fruit trees, and flowering ornamentals all respond well. The application rate is the same: 1 tablespoon per gallon of soil as a monthly top-dress once the plant begins to flower or set fruit.

Does it smell? I'm growing indoors.

Power Bloom has a noticeable fishy, earthy smell when you open the tub and when you first work it into soil. That comes from the bone meal and fishbone meal. The smell fades within a day or two once it's watered in. It won't make your grow room smell long-term, but you'll notice it during application. If you're in a small apartment, apply near an open window.

What's the difference between the granulated and non-granulated versions?

The non-granulated version is a fine powder blend and is approved for organic agriculture. The granulated version compresses the same ingredients into pellets for easier broadcasting on lawns and large beds, but the granulation process means it is not certified organic. For containers and indoor growing, the non-granulated (powder) version is what most growers use. Happy Hydro carries the non-granulated, organic-approved blend.

When should I stop top-dressing before harvest?

Stop top-dressing about 2 to 3 weeks before you plan to harvest. Since dry amendments take roughly a week to break down and become plant-available, stopping early lets the plant finish using what's already in the soil. Unlike salt-based nutrients, organic amendments don't require a flush. The plant will naturally use up the remaining available nutrients during those final weeks.

What if I receive a damaged product or it's not right for my setup?

If you receive a defective or damaged unit, email us a photo at help@happyhydro.com and we'll make it right immediately: replacement or refund, your call. For change-of-mind returns, we accept returns within 30 days for items in new, resalable condition. If you're not sure whether this product is right for your setup, call us first at 716-217-0353. We'd rather answer your questions before you order.

Why should I buy this from Happy Hydro instead of somewhere else?

Happy Hydro has been selling growing equipment since 2006. We've carried Gaia Green for years because the systems work great and customers who buy them leave happy. Have questions before you order? Call 716-217-0353 or email help@happyhydro.com. We're easy to reach and happy to help!

Why Buy From Happy Hydro

Happy Hydro began as a pipe dream in a garage and has grown into something built almost entirely on word of mouth and repeat customers. Rather than focusing on raising margins and obsessing over profits, we've always believed that the right combination of competitive prices, superior products, and world-class customer service speaks for itself. Our philosophy will never change: when you're happy, we're happy.

Our commitment

What you can expect from Happy Hydro

Real People, Real Growers

Our grower support team isn't a call center. They know the products because they're passionate about growing. Reach us Monday-Friday, 10 am-4 pm EST at 716-217-0353 or help@happyhydro.com, before you order or after.

Hand-Picked by Growers, for Growers

Every brand we carry was chosen by our founders because it performs. We only stock premium brands we believe in, and every item is inspected before it leaves our warehouse.

Fair Prices and Free Shipping

We work hard to keep our prices as low as manufacturers allow, and we include free shipping on orders over $49 so there are no surprises at checkout. Find a lower price anywhere and we'll match it.

Authorized for Every Brand We Carry

We're an authorized dealer for every manufacturer on our site. That means you get the full manufacturer's warranty on every purchase. No grey market, no expired stock.

30-Day Returns on Most Orders

Hard to commit to a product you haven't tried. Return most items within 30 days in original condition and we'll take care of it. Read the full policy.

Secure Shopping, Private Data

Every transaction is SSL encrypted. We don't store payment information and we will never sell your data to anyone, ever.

Volume and Commercial Pricing

If you're a commercial grower or putting together a large order, reach out before you buy. We have pricing available that we can't advertise publicly. Call 716-217-0353 or email help@happyhydro.com and we'll take care of you.

Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.

Recover password

Gaia Green Power Bloom Fertilizer 2-8-4

Description