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GRODAN - Block 4GGRODAN 4G Rockwool Block 75x75x65mm 42mm Hole Grow from Seed or Clone to Harvest Take your plants from propagation to full harvest with the GRODAN 4G Rockwool Block. Designed for serious hydroponic growers, this medium sized block offers reliable structure, moisture control, and easy transplanting. Easy to Use Just Soak & Grow Individually wrapped for clean, easy handling Soak in your preferred nutrient solution or rooting tonic Quickly adapts to your
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GRODAN 4G Rockwool Block 75x75x65mm – 42mm Hole

🌱 Grow from Seed or Clone to Harvest

Take your plants from propagation to full harvest with the GRODAN 4G Rockwool Block. Designed for serious hydroponic growers, this medium-sized block offers reliable structure, moisture control, and easy transplanting.


💧 Easy to Use – Just Soak & Grow

  • 🧊 Individually wrapped for clean, easy handling
  • 💦 Soak in your preferred nutrient solution or rooting tonic
  • ⚡ Quickly adapts to your solution’s EC
  • 🌿 Supports nutrient delivery from day one
  • 🪴 Ideal for seedlings and small plants

🌋 Rockwool Growing Medium

  • Made from basalt (natural volcanic rock)
  • Also known as rock wool or mineral wool
  • pH-neutral growing media
  • Designed with air pockets for oxygen and moisture balance
  • Suitable for Controlled Environment Agriculture (CEA)
  • Ideal for indoor cultivation across vegetables, floriculture, and medicinal crops

📊 Strengths of Rockwool Growing

  • 📏 Uniform growing medium for consistent plant behaviour
  • 💧 Water-saving properties – all retained solution available to plants
  • 🌍 Supports biodiversity protection
  • 🌋 Abundant natural resource (basalt)
  • 🏭 Manufactured under strict European regulations
  • 🛡️ Food safety compliant

📏 Product Dimensions

  • 📦 Block Size: 75mm x 75mm x 65mm
  • 🕳️ Pre-formed Hole: 42mm diameter x 40mm depth

📌 Pro Tip for Best Results

  • 💦 Pre-soak in a weak nutrient solution
  • ⚖️ Adjust pH to 5.5–6.0 before use

GRODAN - Block 4G

Item no : 58444824538
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US$ 15.80
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Min. order: 1piece

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Ships within 48 hours · Estimated delivery Jun 30 - Jul 5

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US$ 15.80

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