Rockwool sentence example
- It is also advisable when growing in rockwool slab culture to flush the salt out every 2 weeks with pH adjusted plain water.
- The plants are propagated in a rockwool cube then grown on in a rockwool slab.
- There is a significant exposure to formaldehyde in the construction industry from paints, hardboard, rockwool, plastics and waterproof glues.
- Growing medium - This is what the plants are grown in, usually consisting of pebbles, perlite, expanded clay pellets, rockwool or lava rocks.