How aggressively can I train an auto

LST is low stress.. don't snap the stem or that becomes high stress, lol... bend all you want. i'd get it near horizontal - tied down top and a stake in middle or something so it doesn't arch. the key is when to let the "top" grow vertically to catch up -- and it will dominate growth once you let it grow north. it may need ~2 weeks to catch up. with an autoflower, that's obviosuly a guesstimate at best as to when that is. you can top if you want. you should have ~30" to play with assuming ~24" for light and 6" for spacing above it. With an auto, i'd LST over topping. Bend it down 45-degree to each 90-degree alternating nodes. they'll all growth vertically on an easy path.. make sure none try to snake around a limb or apical meristem. force them on direct route. won't have time for much auxiliary growth beyond what is on the meristem.

As long as u top ur auto in good health u will be absolutely fine. Obviously strain dependent. Some varieties just dont want to be fucked with... photoperiod too. Just dont top too close to flower transition. Do it round week 3. Happy growing fam.

Sorry I ment fim. Dumb phone

I would not top. If anything you could try to find. It is alot less stress on your girl. Or just stick strictly to lay as this causes no slowing of growth at all. Cheers and happy growing!