Lolium perenne (4N)

Tetradark

Tetradark

Tetradark Tetraploid Turf-Type Perennial Ryegrass is part of the new 4turf® ryegrass program. With double the chromosome number, Tetradark’s DNA offers many unique benefits.  4turf® is a new generation of tetraploid perennial ryegrass varieties, developed by DLF research & development to be quick establishing, strong, deep-rooting 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 especially in the cold. It has a deeper crown and superior rooting to help with drought resistance and recover. 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. Tetradark has superior Red Thread and Dolar Spot Resistance. It germinates and grows under high saline conditions.

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Key features

  • Superior drought tolerance
  • Germination & establishment under cold temperatures
  • Excellent traffic tolerance & recovery
  • Blends with tall fescue, Kentucky bluegrass, fine fescues & diploid perennial ryegras

Ratings

Scale 1-9, where 9 = best or most pronounced

9
6
9
8
5
7
7
9
9

General Characteristics
Establishment (Days) 7-10
First Mowing (Days) 10-14
Endophyte + (Yes, No) No
Germination (Days) 3-7
Nitrogen Requirement (Low, Med, High) Medium
Segment Turfgrass
Species Ryegrass, Perennial Tetraploid
Sci. Name Lolium perenne (4N)
Seeding Information
Approx. Seeds/Lb. 250000
Approx. Seeds/Kg. 550000
Seeding Rate - Alone/New (Kg./Hectare) 335-450
Seeding Rate - Alone/New (Lbs./Acre) 300-400
Seeding Rate - Overseed (Lbs./1000 sq. ft.) 6-8
Seeding Rate - Interseed (Lbs./1000 sq. ft.) 6-8
Seeding Rate - Interseed (Kg./100 sq. meters) 4-5
Seeding Rate - New (Kg./100 sq. meters) 4-5
Seeding Rate - New (Lbs./1000 sq. ft.) 7-9
Seeding Rate - Overseed (Kg./100 sq. meters) 4-5

Genetic Color Perennial Ryegrass NTEP 2011-2014

Vintage

7.8

Hancock

7.1

Tetradark

7

Thrive

6.9

Metolius

6.3

Apple SGL

6.1

Sienna

6

Haven

5.9

LSD

0.4

Spring Greenup Perennial Ryegrass NTEP 2011-2014

Vision

6.1

Hancock

5.7

Tetradark

5.6

Thrive

5.5

Stellar 3GL

5.3

Provost

5.1

Sienna

5

Amazing A+

4.9

LSD

0.8

Dollar Spot Perennial Ryegrass NTEP 2011-2014 @Adelphia, Jun & July %

ASP 0012

8

 Tetradark

7

Wicked

6.7

Stellar 3GL

5.3

Metolius

4.8

Grandslam GLD

4.3

 Manhattan 6 GLR

3.3

Pizzazz 2 GLR

3.2

LSD

1.3

Living Ground Cover In Spring NTEP 2011-2014 All Locations

PST-Parkside

94.2

Tetradark

93.1

Wicked

91.6

Aspire

91.3

Metolius

86.8

Sienna

84.5

Pizzazz 2 GLR

83.7

Grandslam GLD

80.2

LSD

8.5