I imagine you mean pelargoniums -
rather than geraniums
which are hardy.
The most important things to remember are that the roots will need to be kept just damp not wet. The plants need lots of light, so a conservatory or window ledge is best. It would help to make more space if the plants are cut back, and they will bush out better....... you could make cuttings out of the bits you cut off.
They will not flourish if in a very humid situation, and will need a good air circulation.
Lastly, it would be a good idea to take off any leaves that look under par - watch for rust as it can spread through the foliage quickly!
Hope they all survive well for you
