Prices incl. VAT plus shipping costs
Delivery time approx. 5 working days
- Order number: 10055
Description
Grodan Starting Blocks with hole 28 mm or 38 mm
Stone wool is light, compact and relatively inexpensive. It has a high water holding capacity and contains a lot of air. Nevertheless, for a tropical plant, rockwool does have its uses. A large proportion of growers grow their plants too wet. This lowers the absorbable EC. This is fine for a growing plant, but not for a flowering one. The PH value of rockwool is quite high, around 8. It is therefore important to water the rockwool with a low PH (5.1-5.5), especially since the rockwool always tends to increase the PH value in the slab. Never put your PH below 5, your plant can handle it, but not the rockwool. It will lose its resilience and collapse.