Warm Days, Humid Nights, and No Frost! Check out my handy Summer Garden Checklist and check-off your summer garden maintenance tasks. For Your Flower Garden: Prolong blooming with regular deadheading. Prune spring-flowering shrubs as lilacs. Keep the garden as weed-free as you can, taking special care to remove weeds before they produce seeds. Fertilize perennials about once every four weeks but only until midsummer. Support plants with stakes or trellises as necessary. Water and fertilize containers and arrange to have them looked after if you go on vacation. Use responsible watering practices to avoid waste and to make plants more drought-tolerant. Do some troubleshooting to figure out why certain plants are struggling. Look for ways to keep your yard cool, such as planting a shade tree or adding a water feature. Cut flowers and bring them indoors to enjoy. Watch for signs of insects and take steps to control them.…