Pot size for space bucket.

I have a nice space bucket I built out of a Brute garbage can. 32gal.

With a 5gal bucket on the lid to give me more height adjustment on the light.

I have never flowered in it. Only veg a few weeks to get into the big tent.

My question is what pot size should you use if I want to flower the plant put in the space can?

I will be growing in a Hempy.

The strain will be Quick one auto by Royal Queen Seeds.

I wat thinking 1gal?

Floor to light at highest point is 32”.