Here we're doing this the smart way and cutting out the bs to show and tell you why you only need a few solutions for the best pot size for your weed plants. Pot size is overhyped and often overpaid, we've ripped out enough living male plants and examined their root size/structure to determine the information provided below.
First off, if you're doing soil, use fabric pots, a.k.a. "smart" pots or air pots. They both allow for premium aeration compared to plastic, clay, or other grow pot types. I personally prefer fabric pots, they are cheap, flexible, washable, and seem to breath the best.
Let's look at the sizes for fabric pots and smart pots and a common scenarios:
If you're in a grow tent, chances are, you're going to be limited by the height of your tent, not your pot size IF YOU USE A 3 GALLON POT SIZE MINIMUM SIZE. Sure, some tents have height extenders, but, if even with the extenders, when we take into consideration you'll have lights, you'll have those take up height, as well as keeping the plants a short distance away from the lights (depending on your type of light) So, you might be a little big going directly for 5 gallons, and 5 gallons also have a larger diameter base, so your tent will have less floor space using the largest pots. Our experience shows 3 gallon to be optimal for most tents.
The best place to buy fabric grow pots and smart pots is generally your local grow store or amazon. Check out these awesome free delivery with prime deals below on amazon.
5 pack of 3 Gallon Fabric Smart pots:
5 pack of 5 Gallon Fabric Smart pots: