Panterra SOS 400 Turf Type Annual Ryegrass Seed
Keep lawns, sports fields, and recreational areas green through the cooler months with Barenbrug Panterra SOS 400 Turf Type Annual Ryegrass Seed. Developed for fall overseeding of dormant warm-season turf, this improved annual ryegrass combines quick establishment, attractive density, and excellent traffic tolerance for dependable seasonal coverage.
Built on Barenbrug’s Panterra genetic line, including Panterra V, SOS 400 produces finer texture and darker green color than traditional Gulf annual ryegrass. Its slower growth also helps reduce mowing demands, making it an economical choice for winter turf maintenance.
| Feature |
Benefit |
| Quick establishment |
Helps restore green coverage as warm-season grass enters dormancy. |
| Fine texture and dense growth |
Creates an attractive surface for lawns and managed turf. |
| Excellent traffic tolerance |
Suits sports fields, golf courses, parks, and recreational areas. |
| Slower growth than Gulf annual ryegrass |
Helps reduce excessive mowing while maintaining seasonal appearance. |
| Natural spring transition |
Designed to fade as temperatures rise, allowing permanent warm-season grass to resume growth. |
SOS 400 provides temporary winter color with a predictable seasonal transition, making it well suited to fall overseeding programs.
| Planting & Maintenance Detail |
Recommendation |
| Package size |
50 lbs. |
| Overseeding rate |
10–15 lbs. per 1,000 sq. ft. |
| Equivalent rate per acre |
Approximately 436–653 lbs. |
| Coverage per 50-lb. bag |
Approximately 3,333–5,000 sq. ft. |
| Planting season |
Fall, as warm-season turf loses color and enters dormancy |
| Minimum soil temperature for germination |
Approximately mid-40s°F |
| Germination begins |
Typically 3–5 days under favorable conditions |
| Recommended mowing height |
1½–2 inches |
Coverage is calculated from the recommended overseeding rate; germination and performance depend on moisture, temperature, and seedbed preparation.
For successful establishment, prepare the existing turf to improve seed-to-soil contact and remove excess clippings and debris. Distribute seed evenly and keep the seedbed consistently moist throughout germination.
As overnight temperatures regularly rise above approximately 60–65°F, SOS 400 begins its natural transition out. This annual growth cycle supports winter overseeding while allowing the underlying warm-season lawn to return as growing conditions change.
