Keep it in that cup its entire life. I usually make a new mom and flower the old one about once a year.
I feed it like a house plant. Give it a shot of full strength nutrients, then just water till the leaves start to show signs of lightening up. Then I nute it again.
When its potbound (at it's full size) it can go 3 or 4 days between waterings. If you trimm it heavy and its regrowing, or it's still young and growing, it can need watering every day.
It's in
promix HPCC, perlite, sphagnum moss and coco coir chunks. With mycorrhizae and ph buffers and all that. No nutes in it though.