Watering, fertilizing, mulching, monitoring for insects and other air borne problems are important factors in caring for a perennial garden. Occasionally, plants need to be divided and thinned to rejuvenate, control plant size and encourage new growth .
Application of a slow release organic fertilzer can be applied approximately 3 to 4 times per growing season. Some fine thing of nutrient applications can be made throughout the growing season to adjust for seasonal conditions using water soluble fertilizers.
Watering of newly planted perennials should be done on a regular basis. Established plants will require less frequent watering.
Dividing is done in the spring and summer. When dividing in the spring, just divide those varieties that bloom in the summer and fall. Only those varieties which bloom in the spring should be divided in the summer.