Lot's of water. I am still getting use to that one. I only have 3 of which 2 are doing well and one I'm still working on. My big one I keep setting in water but i am still afraid to the other 2. I did with the one for a while and if I am going to be gone I do. Do a search on it. I have to re-pot my big one and I am thinking of putting it in Leca. Mr Happyrotter (something like that)has much go info on them.
Some he say's to keep in saucers of water and some not. I think the one you have you do.
I got mine last week! It was in good shape, but one leaf was sunburned. The spikes look awesome, but the nodes must elongate some! I am so hoping it is this kind of mix of yellow and red and not just red or pink. I like the bessieas but like flowers that have varigation or something interesting going on. Plain one colored flowers bore me!