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Green Planet Backcountry Blend Boost 0-18-19 fertilizer in two white tubs.
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GreenPlanet Nutrients BackCountry Blend Boost

Official GreenPlanet Nutrients Dealer Model: BCBBO10KG
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  • Provides a concentrated 0-18-19 NPK boost to maximize production during the mid-flower demand peak
  • Controlled-release granules use moisture to provide sustained nutrition without chemical burn
  • Available in 5 kg to 20 kg formats to support everything from home garden plots to commercial fields
  • View More Details

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THROUGH THE Cultivator's LENS Hands-On Evaluation

  • You are adding a mid-flower PK surge because base nutrients often fall short during the peak demand of heavy blooms.
  • You are switching to granular top-dressing because mixing liquid additives for a large outdoor crop is too much work.

  • We like that this is granular because moisture regulates the release instead of a one-time liquid salt spike.
  • The added calcium keeps cell walls from weakening right when the crop puts on the most weight.

  • Gardeners who switched to top-dressing say they stopped hauling heavy liquid jugs to remote outdoor sites.
  • Users who applied this mid-bloom report denser harvest weights and better colour than using a base alone.

GreenPlanet Nutrients BackCountry Blend Boost

0 – 18 – 19

Outdoor additive to optimize bloom production

🌿 Outdoors🪴 Soil🌱 Soilless

Once your plants are 3–4 weeks into flower, their demand for phosphorus and potassium peaks — and a base nutrient alone may not be enough to push yields to their full potential. GreenPlanet Nutrients BackCountry Blend Boost is a controlled-release granular bloom additive (0-18-19) formulated to deliver a concentrated surge of P and K alongside calcium and humic acid, improving floral development, yield, colour, and aroma at the critical mid-flower window.

Following the vegetative phase supported by BackCountry Blend Grow, this formula is designed to be used in conjunction with BackCountry Blend Bloom during the flowering stage — not as a replacement. Apply by top-dress at 1 tsp per 2 gallons of soil (or 1 tbsp per 2 feet of plant height) 3–4 weeks into flower, or incorporate at 1 lb per 10 cubic feet of soil and adjust based on your plant's specific bloom needs. BackCountry Blend Boost is CFIA Exempt.

Features

🌸
High-PK Bloom Boost

An 0-18-19 ratio delivers a concentrated dose of phosphorus and potassium specifically timed for peak floral development 3–4 weeks into the flowering stage.

⚡
Phosphorus & Potassium for Yield

Phosphorus and potassium are the two most critical elements during flowering — driving nutrient movement, energy conversion, and the structural support needed for heavy harvests.

🧱
Calcium for Cell Wall Integrity

At 5% calcium, BackCountry Blend Boost supports cell wall composition and helps maintain chemical balances in the soil throughout the bloom phase.

🌍
Humic Acid for Nutrient Uptake

Added humic acid improves the movement of nutrients through the grow medium, making phosphorus, potassium, and calcium more available and easier for roots to absorb.

⏱️
Controlled-Release Granular

Granules release nutrients gradually as moisture activates them, providing a sustained bloom boost without the risk of nutrient burn from liquid PK additives.

🔗
Pairs with BackCountry Blend Bloom

Designed as a mid-flower companion to BackCountry Blend Bloom within GreenPlanet's BackCountry Blend Outdoor Feed Program for a complete outdoor season strategy.

🍁
CFIA Exempt

BackCountry Blend Boost is CFIA Exempt — fully compliant for sale and use in Canada, including by licensed producers and commercial outdoor cultivators.

📦
Multiple Size Options

Available in 5 kg, 10 kg, and 20 kg formats to scale from home garden plots to large-scale commercial outdoor operations.

Specifications

Guaranteed Analysis

Nutrient Amount
Available Phosphate (P₂O₅) 18.0%
Soluble Potash (K₂O) 19.0%
Calcium (Ca) 5.0%

Product Details

Specification Value
NPK Ratio 0-18-19
Formulation Granular (Controlled-Release)
For Use In Outdoors — Soil / Soilless
Application Method Top-dress or incorporate into grow media
Top-Dress Rate 1 tsp per 2 gal of soil, or 1 tbsp per 2 ft of plant height
Incorporation Rate 1 lb per 10 cubic feet of soil
Application Timing 3–4 weeks into the flowering stage
Growth Stage Flowering (mid-bloom additive)
Use With BackCountry Blend Bloom
Available Sizes 5 kg, 10 kg, 20 kg
CFIA Status Exempt
Brand GreenPlanet Nutrients

FAQ

When should I apply BackCountry Blend Boost?+

BackCountry Blend Boost is designed to be top-dressed 3–4 weeks into the flowering stage, when plants are entering peak bloom and have the highest demand for phosphorus and potassium. It is used alongside BackCountry Blend Bloom — not as a replacement for it.

How do I apply BackCountry Blend Boost?+

For top-dressing, apply 1 tsp per 2 gallons of soil or approximately 1 tbsp per 2 feet of plant height directly onto the soil surface, then water in to activate the release. If incorporating into the soil, apply at a rate of 1 lb per 10 cubic feet and adjust based on your plant's specific bloom requirements.

Can I use BackCountry Blend Boost instead of BackCountry Blend Bloom?+

No — BackCountry Blend Boost is an additive, not a base nutrient. It is formulated to complement BackCountry Blend Bloom mid-flower, providing an extra surge of PK and humic acid on top of the base feeding. Using Boost alone would not supply the full nutritional spectrum your plants require throughout the flowering stage.

What role does humic acid play in BackCountry Blend Boost?+

Humic acid improves the movement and availability of nutrients through the grow medium, making the phosphorus, potassium, and calcium in BackCountry Blend Boost easier for plant roots to absorb. This enhanced uptake helps translate the high PK content into real improvements in yield, floral density, colour, and aroma.

Why does BackCountry Blend Boost contain no nitrogen?+

By mid-flower, plants have shifted away from vegetative growth and no longer need elevated nitrogen. Excess nitrogen at this stage can actually suppress flowering and reduce terpene development. BackCountry Blend Boost's 0-18-19 formula deliberately omits nitrogen to keep the focus entirely on phosphorus and potassium where plants need it most.

Is BackCountry Blend Boost CFIA registered?+

BackCountry Blend Boost is CFIA Exempt. It meets Canadian federal fertilizer standards without requiring formal registration under the Fertilizers Act, making it legally compliant for use across Canada — including by licensed producers and commercial outdoor growers.

What sizes is BackCountry Blend Boost available in?+

BackCountry Blend Boost is available in 5 kg, 10 kg, and 20 kg formats. The 5 kg bag suits smaller outdoor plots and home gardens, while the 10 kg and 20 kg options are better suited to larger-scale commercial outdoor operations.

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