Barneys Strawberry Lemonaid + BB Cheese , stretch times?

im day 6 into scrogging big buddahs cheese got sativa pheno, and straw lemonaid barneys,
im wondering howlong to train these mofos into the screen,

i have some sativas i train til week 4 and my indicas i dont scrog atall, i do that in veg,

so wodnering any experience with either strain and howlong they will run stretch ?? as id like to let them grow 6 inch through the screen, and typicialy do that towards end of stretch ,