Finches are happiest when kept in pairs, or at least near other finches.
Fortunately, many finches can be sexed simply by looking at different colour patterns. Remember that immature birds usually tend to resemble females. Wicker or box nests may be offered until the first young are raised, at which point the hen is rested by removing the nest. A small cuttlebone and a treat cup containing oystershell should be available at all times. Regular gravel or grit is not needed as the calcium rich oystershell will supply their desire for grit.