About to make scrog tonight but plants are now like 3 to 4 feet tall??

1. . My white widow plants are 3 to 4 foot tall.. Is it too late to Scrog???
I was going to build 2 pvc cubes above my two 600 watt Hps.. What size u recommend ?

maybe 4x4 or 5x5...

Also should i build the net about 3 feet above floor??? that would be about 2 feet above plants then i'm assuming since pots are about a foot tall.

I"m going to build scrog regardless whether i use it next time around or if u you guys think possible can still scrog even though my plants are 3 to 4 foot tile....

Using Pvs.. self tapping screws and mason line.. any advice.. about to start buildiing these in a few hours or so ..

thanks

i got about 6 plants under each 600hps light..
maybe i should cut top cola off a few of them?? they are now about 3 to 4 foot tall.

I recently did it, but I was at 6 days in flower now im 6 weeks in and it looks great to me would have been better if i did it right , done it in veg lol I pulled it off tho, but I got a 400w, and 5 plants, 2 1\2 feet maybe 3 they was, I was just careful, you could just set it close enough on the plant to were you can spread your tops out to each opening and flip the lights , wait, was you going to flip right after cause if not they will grow to were you want them to, just sat it a couple inches above , hope this helps some,