Fall Yard and Garden Issues

Fall will be here before we know it. Take the time to read this to help you through all of your horticulture and insect issues during the fall months.

Bare lawn in need of overseeding.

Bare lawn in need of overseeding.

For fall lawncare, September is a good month for overseeding, fertilizing, and aerating your lawn. If you have bare spots from the floods or have a thin lawn, you can overseed in the month of September, before the 15th will have better establishment before winter, Kentucky bluegrass and tall fescue are the best choices for seed in Nebraska. Remember to fertilize with the holidays, and Labor Day and Halloween are coming up for our final two applications for this year. If your lawn has a deep thatch layer, over 1 inch, you may need to aerate your lawn, fall is a good time for aeration as well.

Weeds in a lawn

Weed control is better in the fall. Many of our perennial weeds and winter annuals will get much better control if they are treated in the fall. This year has been a great growing season for many of our lawn weeds, especially clover. Perennial weeds such as Dandelions, creeping Charlie or ground ivy, and clover, are best controlled in the fall with either 2,4-D or Triclopyr products. Remember to apply these chemicals on days when the temperatures are predicted to be at or below 80 degrees for 72 hours. This is the time of the year when these weeds are taking their nutrients back into their roots for next season’s growth, so they will take the herbicide with them to get a better kill. The winter annuals such as Henbit are just beginning their growth in the fall so it is best to treat them now rather than in the spring when they are almost done with their growing season.

It is finally getting close to the time of the year when we can begin cutting back our perennial plants. Once these plants die back in the fall, when their leaves turn brown, we can cut them back for the year. Peonies and Iris are two plants that should be cut back in the fall to avoid diseases spreading from this season to next since these plants tend to get leaf spot diseases annually. When you go to remove the spent leaves, you can also divide these plants and transplant them if you need them in a different location. Avoid pruning roses and butterfly bushes until the early spring to avoid problems with moisture getting into the hollow stems of these plants. If you have a shrub that blooms early in the spring, such as lilac, forsythia, weigela, some spireas, and some hydrangeas, wait to cut those back until after bloom next spring to avoid removing flower buds that are already on the shrub for next year.

Center photo by S. Cochran, Lancaster County Extension

Center photo by S. Cochran, Lancaster County Extension

Watch for fall invading insects in your home in the fall. This is the time of year when many insects will begin to invade our homes. As it begins to get cooler outside, insects move into our homes to stay warm. Many of the insects we see in the fall inside our homes include boxelder bugs, Asian multicolored ladybeetles, stinkbugs, spiders, millipedes, centipedes, and ants. These insects are mostly just a nuisance to us when they come into our homes. The best control for these would be to seal up all cracks where they can enter our homes and to use the insect barrier sprays around the home, especially around doors and windows.

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