Bonsai is an art form. Because bonsai grow in shallow containers, they require frequent watering and inspection, careful pruning as well as occasional fertilizing, root trimming and repotting, to keep them healthy and within bounds. Bonsai are outdoor plants, but they may be brought indoors for short periods of time on special occasions or for display purposes. To keep top and bottom growth in healthy balance, a plant is periodically removed from its pot and three roots are trimmed back to encourage growth of new feeder roots, then repotted in fresh soil. Bonsai grow and develop from spring to summer, thus they must store up nourishment in the soil to prepare for the winter.
Spring is when most bonsai begin their growth cycle.
Monitor your watering to meet the requirements of your plants. Pay particular attention to deciduous bonsai who are at their peak growing stage and coupled with warmer weather may require additional moisture. Take care to rotate the plants often so that each side receives equal amounts of sun to avoid one side becoming weaker and the other over developing. You should begin fertilizing in April for most plants but not newly transplanted or repotted plants. Evergreens will be happy and flourishing if fertilized from the middle of March on.