Liquid bloom booster for explosive flowering and dense blooms

Bloom Boosters

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      27 products
      Liquid Weight by Green Planet
      Liquid Weight by Green Planet
      Liquid Weight by Green Planet — Carbohydrate Bloom Additive for Heavier, Sweeter Flowers
      from $41.95
      PK Spike by Green Planet
      PK Spike by Green Planet
      PK Spike by Green Planet — PK Bloom Booster for Dense, Heavy Flowers
      from $34.95
      Bud Booster by Green Planet
      Bud Booster by Green Planet
      Bud Booster by Green Planet — Powdered Bloom Additive for Bigger, Heavier Flowers
      (1)
      from $9.95
      Ooze by Bloom – Essential Oil & Aroma Booster for Late Flower
      Ooze by Bloom – Essential Oil & Aroma Booster for Late Flower
      from $30.00
      Sale
      Boost Accelerator by Canna — Flowering Stimulator for All Systems
      Boost Accelerator by Canna — Flowering Stimulator for All Systems
      Boost Accelerator by Canna — Flowering Stimulator for All Systems
      $210.00 from $90.00 Save $120.00
      Back Country Blend - Boost by Green Planet
      Back Country Blend - Boost by Green Planet
      Back Country Blend Boost by Green Planet — Granular PK Bloom Additive for Outdoor Grows
      (1)
      from $4.95
      HORTI rawK by Green Planet
      HORTI rawK by Green Planet
      HORTI rawK by Green Planet — 0-0-62 Potassium Bloom Bulker for Heavier Flowers
      from $4.95
      JACKED by AG Nutrition — Fermented Plant Juice Bloom Booster
      JACKED by AG Nutrition — Fermented Plant Juice Bloom Booster
      (2)
      $65.00
      Add Bud by Fastway - Flower enhancer
      Add Bud by Fastway - Flower enhancer
      Add Bud by Fastway - Flower enhancer
      from $30.00
      Bloombastic by Atami – All-in-One Bloom Additive for Explosive Flowers
      Bloombastic by Atami – All-in-One Bloom Additive for Explosive Flowers
      Bloombastic by Atami – All-in-One Bloom Additive for Explosive Flowers
      (3)
      from $52.00
      Phat by Bloom – Flower Enhancer for Size & Density Boost
      Phat by Bloom – Flower Enhancer for Size & Density Boost
      from $30.00
      Final by Bloom – Ripening Additive for Oil & Flavour Enhancement
      Final by Bloom – Ripening Additive for Oil & Flavour Enhancement
      from $30.00
      PK by Bloom – Week 5 Flower Booster for Weight & Ripening
      PK by Bloom – Week 5 Flower Booster for Weight & Ripening
      from $30.00
      Extreme Boost by Professor's Nutrients – Bulking & Ripening PK Powder
      Extreme Boost by Professor's Nutrients – Bulking & Ripening PK Powder
      Extreme Boost by Professor's Nutrients – Bulking & Ripening PK Powder
      from $37.50
      Ultra by Bloom – Kickstart Flowering, Minimise Stretch, Maximise Results
      Ultra by Bloom – Kickstart Flowering, Minimise Stretch, Maximise Results
      from $30.00
      Switch by Optic Foliar - Flower Initiator - Reverse Hermies
      Switch by Optic Foliar - Flower Initiator - Reverse Hermies
      (1)
      from $45.00
      ATAK by Optic Foliar - Foliar Flower Finisher
      ATAK by Optic Foliar - Foliar Flower Finisher
      from $23.50
      Fruit Roids by Dr Greenthumbs – Organic Flowering Enhancer
      Fruit Roids by Dr Greenthumbs – Organic Flowering Enhancer
      from $58.00
      Karbo Boost by Green Planet
      Karbo Boost by Green Planet
      Karbo Boost by Green Planet — Powdered Carb Additive for Heavier, Sweeter Flowers
      from $24.95
      Terpene Gold by Professor's Nutrients — Certified Organic Trichome & Resin Enhancer
      Terpene Gold by Professor's Nutrients — Certified Organic Trichome & Resin Enhancer
      Terpene Gold by Professor's Nutrients — Certified Organic Trichome & Resin Enhancer
      from $44.95
      Horti Late Bloom by Green Planet - Finish strong with full-flavour flower fuel
      Horti Late Bloom by Green Planet - Finish strong with full-flavour flower fuel
      Horti Late Bloom by Green Planet — 0-24-26 Dry Flower Finisher
      $64.95
      Horti Bloom by Green Planet - Early to mid-flower booster for bold blooms
      Horti Bloom by Green Planet - Early to mid-flower booster for bold blooms
      Horti Bloom by Green Planet — 5-15-26 Dry Flower Base Nutrient
      $64.95
      Horti Cal by Green Planet - Dry Ca+Mg support for full-cycle strength
      Horti Cal by Green Planet - Dry Ca+Mg support for full-cycle strength
      Horti Cal by Green Planet — 14-0-0 Dry Cal-Mag for Veg & Flower
      $44.95
      Professors Boost Organic Nutrient by Professors Nutrients
      Professors Boost Organic Nutrient by Professors Nutrients
      Professors Boost Organic Nutrient by Professors Nutrients
      from $42.50
      Flower Boost by Professor's Nutrients – PK enhancer
      Flower Boost by Professor's Nutrients – PK enhancer
      Flower Boost by Professor's Nutrients – PK enhancer
      from $29.50
      Rokzbastic by Atami – Finishing Bloom Additive for Rock-Solid Flowers
      Rokzbastic by Atami – Finishing Bloom Additive for Rock-Solid Flowers
      Rokzbastic by Atami – Finishing Bloom Additive for Rock-Solid Flowers
      (1)
      from $52.00
      Horti Late Cal by Green Planet — Zero-Nitrogen Calcium for Late Bloom
      $54.95

      Bloom Boosters for Explosive Flowering

      🌸 Get those colas poppin'.

      Why Use Bloom Boosters?

      These boosters are loaded with phosphorus, potassium, and flower-fueling additives to drive bigger yields and denser blooms. Ideal for mid-to-late flower stages when plants need an extra push to stack and finish strong.

      ✅ Maximises bud development
      ✅ Increases flower density and size
      ✅ Compatible with all base nutrients

      Starting strong? 🌱 Check out Root Boosters to build the base.

      Growers First, Retailers Second

      Welcome to The Grow Guys

      We built The Grow Guys from the soil up — well, coco and perlite. Before we sold gear, we bought it, ran it, and learned the hard way what's worth the money and what ends up in the shed. That's the filter everything on our shelves passes through. No sales scripts, no rebadged junk, no telling you what you want to hear. Just gear we'd run ourselves and advice from people who actually grow. Chasing higher yields, tighter flowers, or your first harvest? You're in the right place.

      Meet The Grow Guys

      FAQs

      Calculated at checkout by weight and destination. Free shipping over $499*.

      Order by 2pm and it ships the same business day from Invermay, Tasmania.

      500+ products across 40+ brands, every one filtered through 14 years of real growing experience. Shipping Australia-wide.

      30-day change-of-mind returns on unopened, unused products. A 10% restocking fee applies and return shipping is at your cost.

      Call, email, or walk into the Invermay shop. You'll get a grower on the other end, not a script.