I tried using those cubes for some seeds and won't do it again, a moist paper towel then sow them an inch under the soil works great(I leave the paper towl bits in the soil to retain moisture). I had fresh seeds sprout on the 3rd day and had them popping out of the soil in about a week. The problem I've had two years in a row was the plant shedding the seed, ughhh, had one that wasn't going to happen so I had to crack it off with some scissors and it scarred the plant but eventually it recovered. The problem I found with the rockwool for seeds was it retained so much water I found the root was not reaching through the cube for water.
Purple Daddy Reviewed by Purple Daddy on . :( GERMINATION(why havnt they come up) Im using rockwool cubes i ph with water left out in the sun a couple days then i sand a couple seeds i germinate sum using the paper towel method and i just throw sum right in the cubes to see what works how long will it be till the seedlings come up and i want to know what u think about this setup for the grow and how it could be killing my seeds ill put a pic up to see275205 Rating: 5