What size pots should I use for autoflowers?

I keep seeing conflicting advice. Some say 3 gallon, some say 5 gallon. Does it really matter that much? I have a small 2x2 tent.

3 comments

3 Comments

Experienced2mo ago

3 gallon fabric pots are perfect for autos in a 2x2. You can fit 2 comfortably. 5 gallon is overkill for most autoflowers — they don't use all that root space before they start flowering. The exception: if you're growing in living soil, go 5 gallon minimum because the soil biology needs more volume.

Experienced2mo ago

2x2 tent = 2 plants in 3 gallon pots. That's the sweet spot. I've tried cramming 4 in there and it was a nightmare — no airflow, couldn't water properly, plants fighting for light.

Experienced1mo ago

Fabric pots are key — they air-prune roots instead of letting them circle. This gives you better root structure and harder to overwater. Smart Pots or the Amazon basics fabric pots both work great.