They like sunshine, light and warmth, but not too much water. Water them thoroughly once a week, and include some feed if you have some, then leave them to get fairly dry. We used to keep ours "outside" in the greenhouse in the summer, but indoors in the winter.

For a feed, they usually do best with a moderately high phosphate food, such as Miracle-Gro for Roses. I would let the top cm of soil dry between waterings, but letting them wilt between waterings causes the flowers to be stunted.