Sudostahp -- you might want to try the pellets instead - that is the main reason I like them since I germinate in an enclosure to keep the heat\moisture in thus has no light inside the pellets let me remove the individual pellet from the chamber as soon as the hook becomes visible rather than having to try and wait for the tray to fully germinate or remove it before some have had a chance to germinate. (sure they are a bit more costly but not by that much and they also make up potting much easier since you just place the entire pellet (minus the outer mesh ) into the new container and doing that also keeps the roots undisturbed during the process.