Skip to product information
1 of 2
Green Planet Nutrients CA flag

Official Reseller

Provision Gardens is an official reseller of this brand.

Our inventory is sourced directly from the manufacturer and/or authorized distribution partners. We do not sell used items or unverified/old stock. This helps ensure product authenticity, freshness, and the high standard you expect.

Green Planet Nutrients Back Country Blend Boost - 5 KG

Regular price $39.94
Regular price Sale price $39.94
Shipping calculated at checkout.

OTHER AVAILABLE SIZES / MODELS:

Store Availability
Estimated Delivery Date
Order Within
Province
Est. Delivery
$0.00
Ontario
$125.00
Canada
$149.99
Choose your province
Quantity
Qualifies for Free Shipping Promotion

Description

Description
GreenPlanet Nutrients BackCountry Blend Boost is a controlled release granular bloom additive made to optimize bloom production during the flowering stage in outdoor gardens. It’s a dry fertilizer supplement that delivers a targeted pk boost for bloom-focused performance.

BackCountry Blend Boost is labeled 0-18-19 and built for outdoor use in soil and soilless media. The controlled release format is designed to keep bloom nutrition steady through the flowering stage without turning your grow into a complicated routine. If you want a bloom additive that stays simple while still being purpose-built for bloom production, this product keeps the goal clear.

This controlled release granular bloom additive focuses on phosphorus and potassium, which GreenPlanet highlights for flower development and for nutrient movement through the plant. It also includes calcium, which is tied to cell wall composition and to maintaining chemical balance in the grow medium. Together, these elements support a stronger finish in flowering crops while keeping the formula centered on bloom-stage priorities.

BackCountry Blend Boost also includes humic acid, described for helping nutrients move through the grow medium so they’re easier for the plant to absorb. The formula’s inputs are based on phosphate and potassium sources, plus calcium carbonate, with humic acids derived from humalite. Those components are presented around practical plant outcomes that matter during flowering: improved overall yields, stronger floral development, better colour, and enhanced aroma.

This is a good fit for outdoor growers who want a controlled release granular bloom additive that supports bloom production in soil and soilless media, with a focused pk boost, added calcium, and humic acid for bloom-stage performance.
Product benefits
Flowering Stage; Indoor; Outdoor; Coco Coir Safe; Soil; Soilless; Bloom Support; Extra PK Support; Slow Nutrient Release; Vigorous Flowering; Calcium Support; Humic Acid Support; Yield Size Support; Aroma Boost.
Guaranteed analysis
Available Phosphate (P2O5): 18.0%; Soluble Potash (K2O): 19.0%; Calcium (Ca): 5.0%; Humic Acid: 3.0%.
Derived from
Monopotassium Phosphate; Dipotassium Phosphate; Potassium Sulphate; Potassium Carbonate; Calcium Carbonate; Humalite.

Warnings & Safety

Important – Safety Information

This product may cause mild skin irritation and eye irritation. Avoid unnecessary contact with skin, eyes, and clothing. Use only as directed.

General Safety Precautions

Read and follow all instructions on the product label and any accompanying documentation before use. Keep out of reach of children and pets. Do not ingest. Avoid breathing vapours, mist, or dust that may be generated during handling or use.

Wear appropriate personal protective equipment (PPE), such as protective gloves, long sleeves, long pants and closed-toe footwear. When there is a risk of splashing or airborne particles, use safety glasses or other suitable eye and face protection.

First Aid – Skin Contact

IF ON SKIN OR HAIR: Remove contaminated clothing immediately. Rinse skin with clean water for several minutes, then wash with mild soap and water. If irritation or redness develops and persists, seek medical attention. Wash contaminated clothing before reuse.

First Aid – Eye Contact

IF IN EYES: Rinse cautiously with clean water for several minutes, keeping eyelids open. Remove contact lenses if present and easy to do. Continue rinsing. If irritation persists, obtain medical advice.

First Aid – Ingestion

IF SWALLOWED: Rinse mouth thoroughly with water. Do not induce vomiting unless instructed by a medical professional. Seek medical attention if you feel unwell.

First aid – Inhalation

IF INHALED: Move the person to fresh air and keep them comfortable for breathing. If coughing, breathing difficulty, dizziness or other symptoms occur, seek medical assistance.

Storage And Handling

Store this product in its original closed container, in a cool, dry and well-ventilated area. Protect from extreme temperatures and direct sunlight. Keep container tightly sealed when not in use.

Avoid release to drains, natural waterways or outdoor soil. Dispose of unused product and empty containers in accordance with local regulations and the directions on the label.

Important – Medical

If medical advice is needed, keep the product label or container available. Always follow the specific instructions and safety recommendations provided by the manufacturer. This safety notice is intended as general guidance and does not replace official label directions or documentation.

Guaranteed Minimum Analysis

Frequently Asked Questions

What does available phosphate (P₂O₅) do for plant growth?

Available Phosphate (P₂O₅) supports root development, energy transfer, and early structural growth by providing a form of phosphorus that plants can absorb and use quickly.

Why is soluble potash (K2O) important for plants?

Soluble potash (K2O) is important because it helps plants control water use, move sugars to new growth and fruit, and build stronger, higher-quality structure under stress. It’s unique from many other nutrients because it acts more like a regulator and transport helper than a direct “building material,” so the biggest benefits show up as steadier growth, stronger stems, and better finishing instead of just bigger leaves.

Why is calcium important for plant growth?

Calcium is important because it builds and stabilizes plant cells as they form, acting as the structural support that keeps new growth strong and functional. Unlike other nutrients that drive color or speed of growth, calcium’s role is unique because it controls cell wall strength and membrane stability, making it essential for healthy roots, shoots, and long-term plant resilience rather than quick visual results.

Why is humic acid important for plant growth?

Humic acid is important because it improves root health and nutrient uptake by keeping minerals available, stabilizing the root zone, and supporting beneficial biology, which makes growth more consistent. It’s unique because it doesn’t act like a direct nutrient boost—its main power is improving the root environment so plants can use what’s already there more efficiently.

What does dipotassium phosphate do for plants?

Dipotassium phosphate provides fast, plant-available phosphate and potassium, which supports energy transfer for root and growth processes while improving water control and sugar movement through the plant. It’s important because these two nutrients work together to keep growth steady, but it’s also unique because it can raise root-zone pH compared with similar phosphate sources, so the same dose that helps vigor can also cause micronutrient lockouts if balance and pH stability are ignored.

Why is potassium carbonate important for plant growth, and what makes it unique compared to other potassium sources?

Potassium carbonate is important because it can supply potassium for water movement, stress tolerance, and strong growth, while also pushing the root zone toward higher pH and alkalinity. It’s unique because it doesn’t just “feed potassium” like many other sources—it also changes solution chemistry, so it must be used carefully to avoid micronutrient lockout and calcium/magnesium imbalance.

Why do growers use calcium carbonate for plants instead of a fast calcium source?

Calcium carbonate is important because it supplies calcium while gently buffering acidity in the root zone, helping nutrients stay available and uptake stay consistent over time. It’s unique because it works gradually as a stabilizer, rather than acting like a quick, soluble calcium boost that can spike levels and create new imbalances.

What does monopotassium phosphate do for flowering plants?

Monopotassium phosphate provides fast phosphorus and potassium that support energy use, nutrient flow, and bloom development without adding nitrogen, so it helps flowering progress cleanly without pushing extra leafy growth. It’s unique because it delivers a focused PK boost in a highly soluble form, which can correct stage-related demand quickly, but it must be used carefully to avoid potassium-heavy imbalances that can block calcium and magnesium uptake.

Is potassium sulfate better than other potassium sources for sensitive plants?

Potassium sulfate is often preferred because it supplies potassium without added chloride and also provides sulfur, which supports protein-building and efficient nutrient use, making it a cleaner, balanced option when plants are sensitive to chloride or when you want potassium without pushing extra nitrogen or phosphorus.

What does humalite actually do in the root zone?

Humalite improves the root-zone environment by boosting humic substances that help soil hold water and nutrients more evenly, making uptake steadier and growth less stressful. It is unique because it focuses on long-term buffering and structure rather than acting like a quick nutrient shot.

View full details

Product Comparison

Disclosures

Important – Safety Information Important – Safety Information General Safety Precautions General Safety Precautions First Aid – Skin Contact First Aid – Skin Contact First Aid – Eye Contact First Aid – Eye Contact First Aid – Ingestion First Aid – Ingestion First aid – Inhalation First aid – Inhalation Storage And Handling Storage And Handling Important – Medical Important – Medical

This product may cause mild skin irritation and eye irritation. Avoid unnecessary contact with skin, eyes, and clothing. Use only as directed.

General Safety Precautions

Read and follow all instructions on the product label and any accompanying documentation before use. Keep out of reach of children and pets. Do not ingest. Avoid breathing vapours, mist, or dust that may be generated during handling or use.

Wear appropriate personal protective equipment (PPE), such as protective gloves, long sleeves, long pants and closed-toe footwear. When there is a risk of splashing or airborne particles, use safety glasses or other suitable eye and face protection.

First Aid – Skin Contact

IF ON SKIN OR HAIR: Remove contaminated clothing immediately. Rinse skin with clean water for several minutes, then wash with mild soap and water. If irritation or redness develops and persists, seek medical attention. Wash contaminated clothing before reuse.

First Aid – Eye Contact

IF IN EYES: Rinse cautiously with clean water for several minutes, keeping eyelids open. Remove contact lenses if present and easy to do. Continue rinsing. If irritation persists, obtain medical advice.

First Aid – Ingestion

IF SWALLOWED: Rinse mouth thoroughly with water. Do not induce vomiting unless instructed by a medical professional. Seek medical attention if you feel unwell.

First aid – Inhalation

IF INHALED: Move the person to fresh air and keep them comfortable for breathing. If coughing, breathing difficulty, dizziness or other symptoms occur, seek medical assistance.

Storage And Handling

Store this product in its original closed container, in a cool, dry and well-ventilated area. Protect from extreme temperatures and direct sunlight. Keep container tightly sealed when not in use.

Avoid release to drains, natural waterways or outdoor soil. Dispose of unused product and empty containers in accordance with local regulations and the directions on the label.

Important – Medical

If medical advice is needed, keep the product label or container available. Always follow the specific instructions and safety recommendations provided by the manufacturer. This safety notice is intended as general guidance and does not replace official label directions or documentation.