Patience young jedi. There could be a lot of things affecting the speed they'll sprout out of those blocks, like how deep they were and how tightly packed the media is. A seed is basically a mini plant in the same way an unborn baby is basically a mini human. The hull protects a seed. When it soaks up water, it kicks it all off and signal hormones start getting things rolling again. A lot of the growth you see at first isn't the cells dividing, it's them soaking up water. They're like deflated balloons inside the seed, which blow up with water (the organelle responsible in the cell is the vacuole, which is literally like a balloon that occupies 99% of the cell when it's full, the cell fills it with water to make the structure rigid). You can accelerate the process by soaking them in room temperature water for 24h before planting. It's almost certain that seeds from a lot of plants have evolved to not sprout until there's quite a lot of water around to make sure they'll be able to get going before hatching. They're safe from drout inside the hull, but a drout once they break open will leave the baby cells open to dying. Soaking them assures they're safe to go. The same is true for mushrooms. By the time you fruit them it's not really growing anymore, it's filling up with water and stretching. -if you like my reply and use HID lighting, pls vote in my bulb poll (sig)-
