It's time to clear out any dead wood or cross-over branches for most plant species. Check the ties and supports to make sure they won't girdle your plants. It is spring feast time to those aphids. Try to anticipate the problems you will encounter in your garden, and decide your course of action. Purchase your basic control products, so they will be handy when you need them.
Prevention is the first line of defence against plant diseases.
Catch and treat problems early for more effective control. Now is the best time to repot any container plants that have been around for a while. If the pot and plant are too large or heavy to make repotting possible, remove as much of the surface soil as you can while minimizing damage to the roots. Top dress with fresh potting soil. Buy summer flowers.