Grow Height of these seeds

Does anyone know the grow height of which i should vegitate the barneys utopia haze and greenhouse super lemon? as i've heard they both stretch during flowering.

How tall is your grow space?

2 metres tall

I would expect them to double in size when you switch them, so grow them half the size you have room. Take into consideration how close to the light you can get them without burning them.

if you have a couple CFL to put close to them (even if your using a HID light) it might keep them from stretching so much, worth a try.

gl man

They have a lot of sativa in them, so i'm thinking they may more than double in size, maybe triple? but thats just what i heard about those particular seeds, was wondering if anyone had grow those particular ones and knew out them?