Alsip Home & Nursery Gardening Calendar for May

When your lawn is healthy and properly maintained, you shouldn’t have enough weeds to require chemical treatment. If you have a persistent problem with crabgrass that you cannot control through cultural methods or spot treatment during the growing season, you can apply a crabgrass pre-emergent herbicide. This must be applied before the soil temperatures are consistently 53-56°F. Generally, this will be late April to early May. If broadleaf weeds are a problem, apply a ‘weed and feed’ fertilizer from Greenview or use a selective herbicide in a hose end sprayer such as Trimec. Be sure to follow the directions on the label carefully.

Most grass varieties can be seeded in very late April through May. Wait until early to mid-May for Bluegrass.

When mowing, only one-third of the leaf area should be removed at one cutting. Try to avoid mowing any lower than 2 inches in the spring and adjust the height upwards during hot weather.

If you had a serious grub problem last fall but didn’t treat your lawn, apply Bayer Advanced™ 24-Hour Grub Killer Plus Granules to kill existing grubs within 24 hours. To control the next generation of grubs, apply Bayer Advanced™ Season-Long Grub Control Granules in May or June.

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