Some of the times you lot have been talking about for auto finishes... You guys serious? 3 weeks, then 8-10 weeks!
If it takes longer than 65-70 days from seed, then grow the photoperiod version.
I have 5 set up's. 4 for autoflowers. I always grow on 24-0. If you plant an autoflower, in a 25 litre pot of soil, even a stunted auto will give you 4 ounces minimum. 6 litre pot - 28-42 grams under same conditions for a stunted auto.
Try Sweet Seeds Trainwreck and Sweet seeds Fast Bud#2!
You want fast auto's.. try those. I know they are Spanish, so you girls and boys from the US may not choose them ahead of American genetics, but imo should give them a go instead.
Normally 56 days from seed will be a nice time to harvest fb#2.
The trick is to raise the light really high when they are growing, so you don't stress them out. But mainly to let them stretch up to the lights, then the lower branches can finish level with the top buds with zero training. Have the light too close and the yield is fuck*d as the plants grow too compact.
In fact many people think they have stunted their auto's with many other things, but didn't realise the poor yields from auto's are always from squat plants from the lights being too close. So much easier to hit the right region of perfect rh with a raised lamp.
For a round of auto's I go
Bio Bizz all mix from go
25 litre pot from go
2 feeds, 1st at end of week 4 (1/2ml fish mix - per 1 litre)
2nd when it's dry next. 1.5ml per 1 litre fish mix
Rest of the time I give them bubbled tap water, which is bubbled to ph 7.7.
I'm smashing it like this! I don't grow many photoperiods, as I can yield far more with auto's in the given time. Though couldn't resist a tent of the Cinderella.
I pretty much grow autos from Sweet Seeds and Dinafem. The best two from a big bunch