When to cut back

[linksays]

Hi guys

so I’m using couple of those little plastic pull over cover type ‘greenhouse’ things.

ive done this before with small amounts of success but end up with little space in them.

my question is should I start trimming Back early in anticipation of the stretch before and during begging of flower. 

Or do I let it go as much as possible and hard trim as it starts to flower? 

My thinking is give it hard trim to allow as much root growth as possible? 

But then I’m concerned that I might shock it or somthing.

 

Any thoughts?

 

[KillaChronic]

Remove lower leaves and stems 2 weeks into flowering to create space and give more light and air to bud sites.