Grodan MM 40/40 1.5"x1.5"x1.5" strip (15 per strip)

The Grodan MM 40/40 blocks are compact, high-quality rockwool (stone wool) starter blocks designed for seed germination and rooting cuttings. Measuring 1.5" x 1.5" x 1.5", each strip contains 15 blocks that provide excellent water retention, air porosity, and root zone stability to help young plants thrive.

These blocks are ideal for use in propagation trays and easily transplant into larger Grodan blocks or other growing systems without disrupting root growth.

Key Features

• 15 blocks per strip, each measuring 1.5" x 1.5" x 1.5"

• Made from clean, sustainable stone wool

• Optimised for seed germination and cutting propagation

• Promotes fast root development and healthy starts

• Compatible with hydroponic systems and other growing mediums

Usage
Moisten blocks with pH-adjusted water or light nutrient solution. Insert seeds or cuttings and maintain moisture during propagation. Transplant when roots appear through the bottom.

Ideal for:
Seed starting, cuttings propagation, hydroponics, greenhouse propagation, or transition to larger grow blocks.