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Seeding Exisitng Centipede Lawns
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Overseeding an Existing Centipedegrass Lawn
(To make the existing centipede lawns thicker)

When To Plant

Centi-Seed can be planted almost any time of the year (even winter) however, warm soil temperatures (70 degrees F.) are necessary for satisfactory germination. Winter seedings will not germinate until spring soil temperatures warm up into the 70's. It is important that seeding be done early enough in the year to get the planting established well enough to endure the first winter.  We do not recommend planting after mid-summer (July).

How Much Seed To Plant

To calculate the area to be planted, multiply the length of the lot in feet by the width in feet to arrive at the number of square feet. Deduct a reasonable amount for buildings, paved drives and walks.

Plant no less than one-fourth (1/4) pound per 1,000 square. One pound covers 2,000 to 4,000 square feet and often produces a good lawn in two to three months of summer growth. Using the correct amont of seed is the least expensive part of establishing a good lawn. "Saving" on the cost of seed results in spending more on watering and cutting weeds. - We recommend planting 1/2 lb. per 1000 sq. feet for best results.

Existing Lawn - Seedbed Preparation: Due to existing grass it is harder to "plant" the extra centipede seeds.  These MUST make contact with the existing soil and then ideally need to be covered very lightly by soil (1/8 inch ideal).  To do this you can mow the existing lawn down fairly low (1 inch / 1.25 inches) and rake / vacuum the debris.   The key then is to expose some soil that your new seeds can be planted into.  One way of doing this is to spike aerate several times across the lawn... Vertical mowing is another method to help expose soil for planting purposes.  A third way is to core area and rake out cores prior to planting.  Fourth method would be to rent a slit seeds and professionally plant the centipede seeds no deeper than 1/4 inch.


  • First mow or scalp the lawn as indicated above.
  • Before broadcasting seeds.... Rake, spike aerate, core aerate or scratch up (or vertical mow) the surface of the lawn to bring some soil to the surface. Rake out any cores before seeding.
  • Distribute (broadcast) seed over the area . Use a Cyclone type broadcast seeder. Divide seed in half and go over the area twice, sowing from east to west and then north to south to insure uniformity. You can mix the seeds with clean / dry building sand (play sand) to make  broadcasting easier. 
  • Once the seeds are spread lightly rake the seeds (using lighter metal rake or leaf rake) so as to ensure good seed / soil contact.  An ideal coverage would be to have the seeds making soil contact and become covered 1/8 to 1/4 inch.  NOTE: Do not cover deeper than 1/4 inch as this can result in no germination (planted too deep)

Information provided courtesy of Patten Seed.    Growing a beautiful tomorrow!®
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