Ok, here's the problem-my bro says greenhouses don't work for seedlings/clones. However, almost all of his seedlings/clones have shriveled up and died-why? Is it from over-watering, over-fertilizing or no greenhouse?? Attached is my homemade greenhouse, which i am growing 20 seedlings. it is 2' x 1'. my question is- does starting seedlings/clones in a greenhouse help or what? thanks check out my photo album!