Grodan Starting Blocks Large Hole – Rockwool Blocks for Hydroponics

Block dimensions: 7.5 x 7.5 x 6.5 cm

Hole diameter: 38 mm (also known as 40 mm)

Hole depth: approximately 35 mm

Material: High quality mineral rock wool

pH value on delivery: approximately 7.0-8.5

Recommended pH when used: 5.5-5.8 (to be corrected with a pH lowering solution)

EC value: Neutral (unfertilized)

Packing: Large pack of 384 pieces

Benefits of Grodan Starting Blocks Large Hole

• Perfect air/water ratio for optimal root development
• Stable shape thanks to plastic shell, prevents deformation
• Specially designed for 40 x 40 mm cuttings plugs, such as Grodan Mini Blocks
• Ideal for hydroponic and substrate growing systems (NFT, DWC)
• Easily replanted to larger blocks or substrate

Applications

Grodan Starting Blocks Large Hole are ideal for:

• Professional and hobby growers
• Hydroponics and substrate cultivation
• Strong root growth of cuttings and seedlings
• Cultivation of vegetables, herbs and flowers

Usage tips

Preparing:

1. Immerse the blocks completely in water with a pH of 5.5-5.8.
2. Allow the blocks to saturate and drain.

Plants:

1. Place the cutting or seedling in the pre-drilled 38 mm hole.
2. Make sure the cutting is firm, without going too deep.

Advancement:

• Place blocks in larger hydroponic or substrate systems such as NFT or DWC.
• Check moisture and pH levels regularly for healthy growth.

Why Grodan Starting Blocks Large Hole from Greendiscounter?

At Greendiscounter you buy the original Grodan Starting Blocks Large Hole of high quality. Perfect for hydroponic and substrate cultivation, with competitive prices and reliable delivery. Start your plants with a solid foundation and enjoy a successful crop!