September is a pivotal month for your landscape, with the official arrival of Autumn later this month, and hopefully, a return to cooler and wetter weather. It’s the gateway month between summer and fall gardening so get outside and improve your landscape.
September is the time to apply lawn fertilizer to keep the grass healthy and growing up to the first frost. Always follow the directions on the package and avoid over fertilizing, which will only damage your lawn.
Sow Spring Wildflowers (like Bluebonnets) seed now. For more reliable, uniform seed germination of our State flower, purchase acid-treated Bluebonnets seed. This treatment pits the seed coat, allowing nearly 100% germination in one to two weeks.
Divide your perennial about every third or fourth year to prevent overcrowded beds. Spread a liberal amount of organic matter evenly over the area and mix into the soil at least 6 to 8 inches deep. Space divisions at least one foot apart in all directions so root competition will not be a problem for several years.
September is an excellent month to begin planting trees and most shrubs. Fall landscaping done now will be well-rooted by next Spring and Summer.
Purchase Spring blooming bulbs as soon as they become available. Tulips and Hyacinths should be stored in a refrigerator until November.
Plant your fall vegetable garden. Plant cool-season vegetable garden with transplants of Broccoli, Cauliflower, Brussels sprouts, Cabbage, Chard, Collards, Lettuce, Kale, Endive and Mustard. Water your new vegetables and lightly top-dress with mulch to discourage weeds.
Replenish mulch in beds for winter protection. Change irrigation frequency with the shorter, cooler days of fall. Clean up debris from annual and perennial beds so insects won’t winter there.