Overseeding ryegrass for winter color (optional)
Optional: overseed perennial ryegrass in mid-autumn so the lawn stays green while the warm-season grass is dormant.
- When
- Oct 1 – Oct 31 (northern hemisphere) · Apr 1 – Apr 30 (southern)
- Material
- perennial ryegrass seed (overseed)
- Rate
- 20–30 g/m² · about 4–6 lb per 1,000 sq ft
- For
- Warm-season lawns (Bermuda, Zoysia, St. Augustine)
- Needs
- spreader
- Rule
- wm-winter-overseed · Walheim; Scotts; Turgeon
Optional: overseed perennial ryegrass when soil cools to ~18–21 °C so the lawn stays green over the warm-season grass's winter dormancy. Keep it moist until it germinates; mutually exclusive with the autumn pre-emergent.
What it does
Bermuda and Zoysia turn brown in winter. Sowing perennial ryegrass into them in autumn gives a temporary cool-season lawn that stays green through the winter and fades out as the warm-season grass takes over again in late spring. It is a cosmetic choice, common on golf courses and in warm climates where winters are mild.
When
When soil temperature drops to about 18–21 °C (65–70 °F), usually in October in the northern hemisphere, April in the southern.
How
- Mow the warm-season lawn short and rake out loose debris so seed reaches the soil.
- Sow perennial ryegrass at 20–30 g/m², about 4–6 lb per 1,000 sq ft.
- Drag a mat or brush over it to settle the seed, then keep the surface moist until it germinates, usually within one to two weeks.
- Mow the ryegrass at about 4–5 cm through winter and water lightly in dry spells.
The trade-offs
It rules out an autumn pre-emergent, it means mowing all winter, and the ryegrass competes with the Bermuda during spring green-up.
Sources
- Lance Walheim — Lawn Care For Dummieswalheim
- Scotts — Lawnsscotts
- A.J. Turgeon — Turfgrass Managementturgeon