The care of bonsai is not very different from maintaining any garden.  However, because of the nature of bonsai -  minature versions of larger trees and shrubs - pruning is very important.  The time of the year when you prune a plant is very important.  Some bonsai are trimmed and pruned in early spring whiles others prefer  a summer or fall prune.  Feeding and watering is also very important.  Each bonsai plant has its own preferences.