I use about a 50/50 mix of perlite and have noticed that it raises through the watering cycles, and by the end of the grow, almost all of the perlite is concentrated in the top few inches of the pot. I am considering trying granular rockwool (repellent type) next time - though it may have the same problems. Before I spend the money, does anyone have a tip or trick to help with this? A freind said to add 10% vermiculite to the mix, but I don't want to waterlog anything.
Tokudai Reviewed by Tokudai on . How to keep perlite from floating? I use about a 50/50 mix of perlite and have noticed that it raises through the watering cycles, and by the end of the grow, almost all of the perlite is concentrated in the top few inches of the pot. I am considering trying granular rockwool (repellent type) next time - though it may have the same problems. Before I spend the money, does anyone have a tip or trick to help with this? A freind said to add 10% vermiculite to the mix, but I don't want to waterlog anything. Rating: 5