If someone really wishes to push the concept, they can keep one in a six-ounce Styrofoam coffee cup, at least for a bit longer than a year (I sort of lost interest in the second year, lol). But I would - and did - look at that kind of setup as being more about maintaining ready access to the line instead of something I'd be actively harvesting lots of cuttings from on a regular basis. I kept my three "testers" on top of the medicine cabinet with only two little CFLs supporting them. They received little water, hardly any nutrients, and practically no care. The strains were Royal Flush (wish I'd kept that one going), AK-48, and Snow White (all from Nirvana) and Strawberry Cough (Dutch Passion). It started out as a temporary thing, which became three months, which became six - and then I thought, "Gee, I wonder if I could keep them going until past their birthday?"You can keep mother plants in quite small pots, 2L is fine, and they don't need a lot of light.