1. Overseeding TRF 230

2. Why Overseed Bermuda goes dormant Green color Traffic tolerance Economic reasons

3. Overseeding Myths Drainage improves Protects from winter kill No effect on Spring Transition Reduces weed populations

4. Factors Influencing a Good Overseeding Timing Seedbed Preparation Grass Selection Seed Quality Seeding Rate

5. Timing Too early: disease and bermuda competition Too late: Poor germination rates due to low temps Night temps in the 50’s Soil temps at 4 inch depth low 70’s Cool season turf favored by temps between 50 and 70 degrees 20-30 days before first killing frost

6. Seed Bed Preparation Year long process Purchasing seed and seed selection Over seeding schedule Healthy bermuda grass base

7. Seed Bed Preparation Greens and Tees Three to six weeks before overseeding Nitrogen fertilization reduced or stopped to reduce bermuda competition Soil cultivation be sure to allow time for recovery Vertical mowing to reduce thatch and open soil surface Topdressing Apply P and K (get a soil test)

8. Seed Bed Preparation Greens and Tees Ten to 14 days Reduce mowing height Light vertical mowing to enhance seed moving through canopy Clean debris Irrigate good

11. Seed Bed Preparation Fairways Less intensive Close mowing Remove debris Correct thatch problems if they are a problem

12. Grass Selection Perennial Rye grass larger seed Poa trivialis smaller seed Blends different cultivars of same speciecs Mixtures different cultivars of different species Budget Intended quality Planting date Traffic or play intensity

13. Grass Selection Select a blend or mixture to customize your overseeding to meet your requirements Green color, texture, density Establishment rate, winter and spring performance Spring transition, wear and shade tolerance Putting quality, competitiveness with Poa annua Disease resistance

14. Seed Quality Blue Tag Certified Seed Percent purity Free of hard to control weed seeds Acceptable germination rates Fungicide treated seed

15. Seeding Rate Depends on seed size, area and use Too low thin stand of grass and large plants Too high weak stand that is disease prone Perennial Ryegrass 25-40 Lbs per M for greens 250-450 Lbs per acre Poa trivialis 8-12 Lbs per M for greens

16. Overseeding Process Greens Varies by superintendent and situation Apply seed when surface is dry Wind speed less than 5 mph Carefully calibrated spreaders 2 different directions Protect boundaries Light topdressing Drag seed in with carpet

17. Overseeding Process Fairways Seed in two different directions Mat or drag in seed

18. Post Planting Care Light and shallow irrigation careful not to puddle water Brush seed back in place that gets moved by water Reduce irrigation as grass gets established

19. Post Planting Care Disease Management Pythium and Brown patch Apply fungicide 5-7 days after planting These diseases are favored by: Warm weather Long periods of moisture on the leaf High seeding rates

20. Post Planting Care Mowing Start out at ½ inch and gradually lower by 1/32 to ¼ inch in 2 to 3 weeks 4-6 weeks until reach 3/16 Use sharp mower

21. Post Planting Care No Nitrogen until bermuda has stopped growing 2 to 3 weeks after seedlings have emerged ¼ to ½ Lbs of Nitrogen every 2 to 3 weeks Minimize traffic For winter management proper fertilization and irrigation ½ lbs of N every 2-3 weeks