Hello.

First good luck with your grow and welcome here.
Why did u go with a Wilma 4 in a 1.2*1.2m tent? You could easilly used a Wilma 8 or even a 10.

If you will only grow 4 plants then ScrOG or FIM them I would propose to get them bushy. Also with only one light you will need a very even canopy so put in some work to keep them evenly high later on.

You will want those plants to yeild a lot/plant if you only grow 4 and that will be hard with one light and 4 stretchy single stem plants lit by a single light. I have a bit of a problem with that here. I also grow WW, 5 of them and it is also my first grow. I FIMed one to see what happened and let 4 grow single stems and it is becoming a problem to light them evenly with one 600W HPS for me now.

As for light. You can start using the HPS already a few days after they are above ground and tbh you could use it from start as long as some care is taken.

If you want check in on my grow and download my Excel grow diary. It is updated now and then in posts and if u download the latest update I did to it you will have detailed day by day information from seed to start of 12/12 in it. I update those every week or so.
Anway, again, good luck and have fun.

Puffzter
Puffzter Reviewed by Puffzter on . Seedsman white widow x 4 feminised, Wilma grow system Hi guys just new to the site, firstly my friend has purchased a xl budbox tent 1.2m x 1.2m x 2m, 600w hps light system, carbon filter fan system and a 4 pot wilma flood and drain system. So far everything is setup perfect and the seeds have just been planted for germination in a unheated propagation tank (using nutrient soaked rockwool) which has been placed in warm cupboard above the water heating system. The guy has done quite alot of backround research into this but wants to find out a Rating: 5