so i planted 5 seeds awhile ago and 3 of them germinated and sprouted about a week ago. The sprouts look pretty good except one of them seems kind of flimsy and weak. the stems on the 2 strong looking ones look normal. here is an example: however, on the flimsy looking one, the bottom of the stem is kindof whiteish. this looks like the point where the stem is weak, causing the sprout to be flimsy: do you guys have any ideas on what the problem might be?