Organic liquid fertilizer bottles for hydroponics and soil-based gardening

Organic Liquid Fertilizers

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      9 products
      Ocean Magic by Green Planet — Cold-Pressed Kelp Veg Booster
      Ocean Magic by Green Planet — Cold-Pressed Kelp Veg Booster
      Ocean Magic by Green Planet — Cold-Pressed Kelp Veg Booster
      from $24.95
      Sale
      Monsta Bud by Ozi Magic — Organic Flowering Nutrient
      Monsta Bud by Ozi Magic — Organic Flowering Nutrient
      Monsta Bud by Ozi Magic — Organic Flowering Nutrient
      $280.00 from $24.95 Save $255.05
      Sale
      HyMax Phosphorus by BBA Biosolutions – Microbial Phosphorus Mobiliser
      HyMax Phosphorus by BBA Biosolutions – Microbial Phosphorus Mobiliser
      HyMax Phosphorus by BBA Biosolutions – Microbial Phosphorus Mobiliser
      $65.00 from $59.95 Save $5.05
      Grow Fast Organic by Professors Nutrients - Vegetative growth booster
      Grow Fast Organic by Professors Nutrients - Vegetative growth booster
      Grow Fast Organic by Professors Nutrients - Vegetative growth booster
      from $39.50
      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
      Sale
      HyMax Roots by BBA Biosolutions – Root Zone Microbial Enhancer
      HyMax Roots by BBA Biosolutions – Root Zone Microbial Enhancer
      HyMax Roots by BBA Biosolutions – Root Zone Microbial Enhancer
      $55.00 from $49.95 Save $5.05
      Professors Boost Organic Nutrient by Professors Nutrients
      Professors Boost Organic Nutrient by Professors Nutrients
      Professors Boost Organic Nutrient by Professors Nutrients
      from $42.50
      Professor’s Bloom Organic Nutrient by Professor’s Nutrients
      Professor’s Bloom Organic Nutrient by Professor’s Nutrients
      Professor’s Bloom Organic Nutrient by Professor’s Nutrients
      from $35.00
      Professor’s Grow Nutrient by Professor’s Nutrients – Certified Organic Veg Formula
      Professor’s Grow Nutrient by Professor’s Nutrients – Certified Organic Veg Formula
      Professor’s Grow Nutrient by Professor’s Nutrients – Certified Organic Veg Formula
      from $35.00

      Organic Liquid Fertilizers for Natural Results

      🌿 Pure inputs, powerful outcomes.

      Why Choose Organic Liquid Fertilizers?

      Go green without going soft. These organic liquid fertilizers pack a punch using certified ingredients that work in harmony with nature - not against it. Whether you’re deep in hydro or hands-on in soil, these formulas deliver flavour, growth, and yield without the nasties.

      âś… OFC-certified and clean-input compliant
      âś… Quick absorption and full-spectrum nutrition
      âś… Works across all substrates: soil, coco, hydro, and blends

      Want microbial support too? 🧬 Explore Microbial Enhancers to build a thriving root zone.

      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.