Started seeds a bit early for southern alberta. Now I have 2wks before last fost and have cucumber, cauliflower, broccoli, tomatoes that either have to go into larger pots or in the ground. They're in 3.5" pots and 10 -12" tall. No green house here. Q: To slow their growth,can I give them min. Light? 6-8hrs...thanking you in advance of ur help