Grodan Gro-Wool Medium Water Absorbent Granulate Rockwool

While perlite is primarily used for drainage and aeration, Gro-Wool provides both aeration and significantly higher water retention. It is a more durable, long-lasting alternative that won't break down or float to the surface as easily as perlite.

Gro-Wool is designed as an amendment to be mixed into existing potting soil or peat-based blends. It is not intended to be used as a 100% standalone medium for traditional potted plants.

Grodan rockwool is chemically inert, meaning it will not significantly alter the pH of your potting mix. It provides a stable environment for roots without introducing unwanted minerals or acidity.

You can customize the ratio based on your plant's specific needs, but a common starting point is mixing 10% to 20% Gro-Wool into your soil. Increase the amount if you are looking to extend the time between waterings.

Gro-Wool improves aeration while holding moisture, which helps prevent soil compaction. However, because it has high water-holding capacity, you should monitor your watering frequency to ensure the soil doesn't stay saturated for too long.

Yes, Gro-Wool is a long-lasting material that does not break down easily. You can reuse the granulate when repotting, provided the previous plant was healthy and free of soil-borne diseases.