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Grodan Cube LDR 100X100X65 mm Hole 27/35 mm
The Grodan Cube LDR 100x100x65 mm is a compact rockwool growing block with a 27/35 mm tapered hole for smaller rooted propagation plugs. Works well as an intermediate stage between propagation tray and final substrate, or as a standalone medium for compact plants. Inert rockwool gives full control over feeding. Available at Plant & Flower.
Grodan Cube LDR 100x100x65 mm – compact rockwool block for targeted growth
Not every plant needs a large block. The Grodan Cube LDR 100x100x65 mm provides a well-proportioned rockwool volume in a compact 10x10x6.5 cm format, with a tapered 27/35 mm hole for smaller propagation plugs. See our full substrate range in the cloning and propagation category.
Same Grodan quality, smaller footprint
This block uses the same optimised fibre structure as the larger Grodan blocks: uniform water content and EC distribution from top to bottom. Start your cuttings on a Grodan 150 Plugs tray and transfer them into this block once roots are visible.
Tapered 27/35 mm hole
The slightly conical hole (27 mm at the base, 35 mm at the top) grips the propagation plug firmly and ensures full contact between plug and block. This promotes rapid root penetration into the surrounding rockwool and faster colonisation of the available volume.
Intermediate step or final medium
Use this block as a stepping stone before moving plants to a larger Grodan Cube LDR 150, or as the final growing medium for smaller plants. It works in hydroponic drip systems, on growing tables, or transplanted into soil or coco.
Order the Grodan Cube LDR 100x100x65 mm at Plant & Flower — fast delivery across Belgium.
What does the 27/35 mm hole size mean on the Grodan LDR 100 block?
The hole is tapered: 27 mm at the bottom and 35 mm at the top. This shape holds smaller propagation plugs securely and ensures solid contact between the plug and the rockwool, promoting efficient root growth into the block.
Can I transplant the Grodan LDR 100 block into soil?
Yes, place the entire block into a pot with soil, coco, or another medium. Rockwool does not decompose but it does not restrict root growth either. Roots will grow through the block and into the surrounding substrate without issues.
Is the Grodan LDR 100 suitable for hydroponic systems?
Yes, this block is designed for hydroponic use, particularly drip irrigation systems. The rockwool fibre structure distributes water and nutrients evenly. Ensure proper drainage below the block to maintain the right moisture balance.
