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