How tall should seedling plants be before transplanted to be grown under my 1000w hps buld?

Question

I have a six buckett hydroponics system using rockwool...

Answer 1

It isn't how tall they should be, but rather how healthy they should be. You don't mention what type of plants you are trying to grow (hehe as if I cant guess), but if they are what I think, then they should be about 3-4 inches tall, and a nice green colour, and keep the lights well above the plantlings, as you do not want to burn them. And check for moisture levels in the soil frequently, as you don't want them to dry out!!. 1000 watt bulbs generate a lot of heat quickly, so be careful.

Answer 2

enable them to get a sprint bigger. make beneficial they have their actual leaves and not in basic terms the preliminary 2 starter leaves. tomatoes are very forgiving. once you're waiting you may cut back them aside. Then repot them so each and all the leaves however the suitable 2 or 3 pairs are above the soil. you're able to ought to style of lie it down a sprint to try this. while they get bigger repeat this. by applying burying the stem you will get roots each and each of ways alongside the stem and so get a plenty better plant. as quickly as you ultimately plant them interior the floor while they get to 3 foot severe you may pinch off the suitable instruments of leaves which will lead them to branch out a sprint relish