Extension

After the warm Oklahoma summer, it’s time for some homeowners to give their lawns a makeover. Following the summer heat, many lawns are showing signs of stress, including thin patches and bare spots. Fall is a great time to rejuvenate cool-season lawns by overseeding.

 

Turf type tall fescue and Kentucky Bluegrass are cool-season grasses that are more shade tolerant than warm-season turfgrasses, and are frequently used in semi-shady areas, usually as a mix. The month of October is the best time to establish a cool-season lawn or overseed tired cool-season lawns.

 

Though not highly recommended, perennial ryegrass can be planted into warm-season turfgrass to produce a green turf cover through April. Keep in mind, however, this will result in more lawn maintenance throughout the winter months, including mowing, fertilizing and irrigating. Annual ryegrass is best used for temporary soil stabilization of bare ground during the fall and winter when weather conditions aren’t favorable for the establishment of warm-season turfgrasses.

 

To help ensure a successful overseeding operation, follow these tips:

 

Buy fresh, quality seed. The recommended overseeding rate is 10 to 20 pounds per 1000 feet squared. If areas of the lawn receive heavy traffic, seed at a higher rate. Seed may be hand broadcast or spread with a drop spreader or cyclone seeder.

• When overseeding bermudagrass, zoysiagrass or buffalograss lawns, wait until growth is slowed by cool weather. But, don’t wait too long because too-cold conditions will hinder or even prevent germination and growth.
• Before seeding, mow the lawn relatively short. Remove all clippings and debris. Rake or aerate to create good seed-to-soil contact.
• Moisture is essential for good germination. Water lightly up to three or four times a day until seeds are established. Once established, reduce watering frequency, but water more deeply.
• Consider applying a balanced starter fertilizer to encourage strong root development. This will also help the grass prepare for winter weather.

 

A little effort now means a thicker, healthier lawn next spring.