Outdoor autos pot size?

I normally grow indoors because I like the control and lack of variables. But I just got a couple cool strains of autos. Decided to take advantage of the nice summer weather on Cape Cod and try an outdoor grow.

I'm a tomato grower, and have an inventory of 5, 7, 10 and 20 gallon soft pots. I'm leaning towards the 20s because I have them, and never used them to grow weed. But I wonder given they're autos and grow so fast if the added size will make a difference? Plus the added expense of all the soil.
Thoughts?

I'm thinkin 10 gal would be sufficent..

HydoDan said:

I'm thinkin 10 gal would be sufficent..

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I’d agree with @HydoDan about the 10G. Isn’t gonna be enough time to fill out a 20g with an auto and a 10 should net a good size plant.

What you put in that 10 gallon makes a big difference!!

You want a good amount of sativa so it’s extra vigorous and can root it all!! But tbh 10 gallon may be overkill and hard to water unless you transplant it in stages.

Fastbuds blue dream, gorilla strains, orange sherbet etc. Mephisto hubbabubbahaze, fantasmo express etc.

Basically aim for high yielding plants! Gd luck!

IMO - 10 gallon is minimum for outdoors, you'd do much better with the 20 gal pot.
Last years auto filled 25 gal pots

Good luck

Bigger is better outdoors personally i feel there better in the ground but i think if a 20 gallon pot is the biggest one you got and they cant go directly in the ground id go with that