When to pollinate LR2 w/ WW?

so i have a couple ww clones that i just flowered and i also just started lr2 seeds. was going to pollinate one of the LR@ girls and thought it might be cool to cross it with one of the clones also. I have heard to pollinate the LR at about 5 weeks, but i am not sure when to cross with the ww. is it too late to cross the clones when they are 5 weeks into flowering?

dunno but i wouldnt mess with the autoflowering strains, they're total shit man! least lowlife's are.

seeds can finish as quick as two weeks (i think) but its best to let them go a month. give it a shot, just try and pollinate a little bit so if they dont work you wont mess up a whole plant. 3 weeks should be enough time to get some mature seeds! just my 2 cents.