Aerate several times before broadcasting seed; aeration holes should be spaced not more than inches apart. Use core-type aerating tines that remove soil plugs for better seed-to-soil contact. After overseeding, give the area a heavy watering right away to wash seed into the aeration holes and help break up the aeration cores on the surface.
Remember broadcast seeding requires more grass seed and the germination rate is not as high as with slit-seeding. Depending on conditions and type of seed, new grass seed will begin to emerge in days after seeding when moisture and soil temperatures are adequate. An overseeded lawn can be fully established in eight weeks or less.
Proper watering is critical to successful overseeding. The following is a recommended watering program. The key is care and patience. Proper overseeding will produce a healthier, better-looking lawn that responds better to mowing, fertilizing and watering. An added benefit is increased property value! The following photographs show a complete renovation that was done using proper overseeding equipment and procedures.
Late summer or early fall is the best time to overseed lawns. Soil and atmospheric temperatures are most favorable for optimum seed germination and growth.
With adequate moisture, fertilizer and sunlight, the new seedlings will be well established before cooler fall weather sets in. Also, weed competition is less of a factor at this time, giving the grass seedlings a better environment to grow and develop. Spring overseeding risks the chance of weather-related problems heavy spring rains, unexpected high temperatures and weed competition. Also, spring seeding may interfere with the application of preemergent crabgrass or broadleaf weed killers; concurrent application of seed and herbicides is generally not recommended because the herbicides may cause poor seedling establishment.
It is best to delay herbicide treatment weeks after new grass seed germinates. If you choose to overseed in the spring, be sure to follow proper seeding and treatment practices. Midsummer overseeding faces greater chances of disease, heat and drought stress, and weed competition. Proper weed control and adequate irrigation are musts if overseeding is attempted in midsummer.
Dormant overseeding involves seeding in late fall or early winter, after soil temperatures are low enough to prevent seed germination.
Note: When overseeding Bermudagrass in southern parts of the U. Bermudagrass and other warm-season grasses need warmer weather to germinate and fully develop. Augustingrass, Centipedegrass.
Cool-season grasses, such as Kentucky Bluegrass, Perennial Ryegrass, Bentgrass and the Fine Fescues, are used primarily in western, northern and eastern areas of the United States. They tolerate moderate summertime temperatures but will also survive severe cold associated with northern winter conditions. Warm-season grasses, such as Bermudagrass, Centipedegrass and Bahiagrass, are used in the south, southeast, and southwest United States.
Tall Fescues are used extensively in the midsouth and west regions and with the advent of new turf-type Tall Fescues, their use is expanding into other geographic areas as well. For detailed recommendations, contact your lawn care professional or county extension agent. Do you need to start over? See previous illustration above. Note: Whether or not a chemical such as Glyphosate is used, it usually works better to overseed new grass into the old, undisturbed turf, even if it is dead, rather than start with bare dirt.
Overseeding is faster and easier than completely digging up the soil, and it leaves some cover to protect against wind or water erosion of the soil surface. Aerification: The process of improving the movement of air, water and nutrients into or within the soil, usually by removing soil plugs or cores.
Also performed to relieve compaction of soils. Annual grass: Any plant which germinates, matures, produces seed and dies within one growing season. Bahiagrass: A coarse-textured, low-maintenance warm-season grass which is primarily regarded as a clump grass but also spreads by rhizomes.
Bentgrass: A cool-season grass of fine-to-medium texture with stoloniferous growth. Used primarily on golf course greens, tees and fairways. Bermudagrass: A popular warm-season grass of fine-to-medium texture with vigorous growth from rhizomes and stolons. Quite often planted for sod production. Experts from Family Handyman describe the two main types of overseeder machines: drop spreaders and broadcast spreaders.
Drop spreaders are smaller, and their hoppers are usually no more than 2 feet wide. The compact size makes it easier to control the spread pattern when working near sidewalks, patios or flowerbeds. If the lawn is more than 4, square feet, a broadcast spreader will work better since the seeds flow out faster and wider.
However, these grass seeder machines may be heavier to push. Broadcast spreaders can be more expensive as well, but they're better suited for larger properties. Some lawn overfeeders also can be used to spread fertilizer and other lawn care products, which are useful to have. Lawn aerating is different from lawn overseeding. According to the team at Bob Vila , aerating involves punching holes right into the soil with an aerator tool.
These tools have hollow tines or solid spikes and increase water flow, airflow and nutrient absorption. Aerating is also good for removing extra thatch and repairing compacted soil. Lawn aerators can be rented or purchased. Preparing the Lawn Prepare your lawn to receive the new seeds. Remove thatch having a dethatching tool and rake the free thatch as well as other debris from the lawn. Remove any weeds that collected in clumps with all the rake and loosen the top layer of soil. Water the lawn to moisten the soil.
The direct soil-to-seed contact is necessary for growing new grass. Overseeder Basket The overseeder basket holds the seeds. Choose the seed type that thrives in your atmosphere.
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