Tetradark tetraploid turf-type perennial ryegrass is part of the 4turf™ ryegrass program for tough turf. 4turf™ with double the chromosome number and DNA has many unique features.

4turf™ is a new generation of tetraploid perennial ryegrass varieties, developed to be quick establishing, strong, deeprooting and tolerant to stress. 4turf™ is better able to withstand a range of stressful conditions, such as drought, cold, disease and wear.

The larger seeds contain more reserves for stronger faster establishment. It has a deeper crown and superior rooting to help with drought resistance and recovery. Tetradark has darker color than other 4turf™ varieties and moderate density enabling it to blend better with turf-type tall fescue, Kentucky bluegrass, diploid perennial ryegrass and fine fescues. TetraDark establishes faster and gives you thick green turf all through the year. It is the perfect part of mix for homes, sports fields or golf courses. Superior for use in repairing damage throughout the year it opens up many opportunities. With 4turf™ you can get results whether you have drought, disease or cold.

  • Seedling vigor
  • Germinates under cooler soil temperatures
  • Drought tolerant
  • Cold and wear tolerant
  • Dark green color

Visit our Mixes page to explore premium Earth Carpet® mixes with turf-type perennial ryegrass varieties. View mixes.

Seeding Rate
Seeds/lbs: 150,000-180,000
New Turf: 6-8 lbs/1,000 sq ft

Overseed Rates
3-5 lbs/1,000 sq. ft.

Germination: 7-10 days under ideal conditions
First Mowing: 14 days after emergence
First Limited Use: 21 days after emergence


Please see “Management” tab on “Ryegrass” page for detailed turf management information and best practices.

We’ll continue to update this tab, so please visit periodically to see additional information and resources including product data, testimonials, photos, marketing material and more.