Hey! I have only done that 14 times. It’s not b-b-b-a-a-d-d-d fffor yyyyyyyou !
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dang. i wish i found this thread sooner 
i just love quick, short autos. best for roadside seed chucking.
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Great thread. I really enjoy it.
And I have a couple of questions. There are probably answers here, but my wife will kill me if I continue …
In the F2 generation, is there any difference in growth at which some guessing could be done before flowering. Whether it’s a auto, a photo or a fast version.
And in what sense is a fast version fast? Shorter flowering? It starts to bloom on a longer day?
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The autos are easy to tell, they will begin flowering under 18+ hours of light at about 3-4 weeks. If they are a full on photo (homozygous) or “fast” version (heterozygous) is a lot harder to tell without flowering them out completely.
In my experience it can knock a week or two off the flowering time. For example my Juanita went 11 weeks, but when I crossed it to Lowryder to make JLo they finished in about 9 weeks.
That’s a really interesting question that warrants some research. 
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Hey
One more question regard size of autoflower plants.
Im in search for regular autos in Europe and there is some to choose from. In the descriptions of strains they describe lines as dwarf, medium…
Question is how ruderalis genetics are responsible for growth and size of autoflower plants?
For egzample…
If we have medium size IBL photoperiod female plant and pollinate her with dwarf auto pollen. We make F1 cross. Would AF plants in F2(25%) will be small plants or there will be some wiieder range in size?
Would dwarfness will be reduced with further bx on photo mother and with reapeted proces till AF plants? Or is dwarfness somehow linked with AF trait? Shorter veg cycle and faster switching to flowering mode? Something else?
Thanx
Sorry if question isnt clear enough, but i have to swet hard to compose longer text in english
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For the most part, autos will be smaller than photos due to their limited veg cycle. Some of the older autos would flower as soon as the tap root hit the bottom of the pot.
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I’ve thoroughly enjoyed this thread! Last year I got my first auto, Bubblegum Auto from @CADMAN. I cherished these seeds and made an outdoor grow to make seeds. I was able to pick 4 seeds off the plant from the pre flowers luckily before a critter ate the entire plant! I got those 4 started now and need to make seeds to keep this beloved gift going. They are A few weeks old and tiny and one is flowering already. Wasn’t aware of the final pot size rule lol. There’s something about autos that’s just fun about them. They all were deformed in the beginning but are straightening out. They basically topped themselves tho so that’s cool
Idk if it’s worth transplanting them? So far only the one is showing sex. I’m fine with itty bitty plants I just wana make seeds. Well, and try the bud out and see if we like it lol. But it’s a gift so I wana keep this strain
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So, my current seed pop didn’t go as well as I wanted (3/8 I’m sure user error) so I dropped a couple autos and put them in some laundry baskets that are 1.16 cubic ft (8.6 gallons) and I’m curious what’s the biggest auto you’ve ever grown?
Starting with supplemental nutes (clonex.or something for seedlings half strength) at 14-21 days, then veg nutes till flower, then 3/4 - full strength bloom till finish?
Just want to see about getting the maximum growth for the lifespan.
I’d love to have a couple beast autos, but never really dialed it in, and now seems as good a time as any.
Thanks much! 
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Personally, the biggest auto I’ve grown is about 2-3 ounces. I know a user on ICMag that regularly grows autos about 300-400 grams.
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Greetings @nefrella,
If you want to get the very most out of your autos I’d suggest adding serious training to your arsenal.
I have found that most of them tolerate topping, and any LST tricks you can use to create a horizontal canopy and allow all the budsites to “See The Light!”
There’s a limit to how big they are going to get, even in big pots like you are using, so your goal is to get as much yield out of every branch.
Just my $0.02
-Grouchy
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This is very true, which is also got me questioning using these huge pots. At least I suppose it will keep them spaced out enough that I can train them should I decide to. At what node would you recommend topping? I’ve always thought an auto wouldn’t have enough time to recover, interested to study more. Thank you!
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Yep, that’s what They Say, but in my experience “It’s not what ya know that’s the problem, but what ya know that just ain’t so!”
I’ve used 15 gal pots and never had an auto fill the soil mass. Methinks they just don’t live long enough to develop a massive root ball. I bet there’s little benefit beyond five gallon pots.
TBH, I’ve only grown about a dozen auto strains all told, pretty small sample, Caveat Emptor.
-Grouchy
PS, I top above the fourth node usually. I posted my training technique
somewhere on OG…
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Copy, I’ll do a search and inquire. Thank you for the thoughtful replies
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Not sure I understand the question. This thread describes the process. I’m not familiar enough with the genetics to suggest pairings. If it were me I would start by growing some out and seeing if they produce anything I like. If so, then start from there. It’s all trial and error.
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Do you direct sew your autos? I have some that I want to try but because of the cost per seed, it freaks me out. Lol, perhaps I’m just a weirdo. ThX @ReikoX
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Yes, I’ve also transplanted autos, but you have to be quick about it. Too long and they may start flowering. You can also dig out the center of your pot and fill it with a seedling mix.
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Anytime ive transplanted my autos i let them get a few leaves then transplant… I don’t let them get to the point of filling the solo cups with roots like I do a photo. As far as I can tell it hasn’t had a negative effect
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I’m going to try peat pots next spring when I plant my outdoor autos. I was told there would be no slow down when I transplant the peat pots into the final pots
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Peat pots are great. You just plant the entire thing pot and all directly into its new medium and continue as normal. As the peat pots take on water they soften allowing the roots to grow through them into the new medium. It minimises any chance of transplant shock. 
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There’s a few recent videos from buildasoil on YouTube & Jeremy shows how the timing is super important & his runt plant was way outpacing the ones that were further along at transplant time. 
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