DOUBLE

Mixture partner for better disease and stress tolerance

Fight against stress
Tetraploids have long been known to show better stress and disease tolerance compared to diploids. Now these advantages are also available in a turf grass variety: DOUBLE. In particular in dry conditions DOUBLE outperforms diploids. DOUBLE is one of the varieties in our 4TURF brand (ask for specific brochure).

Disease resistance
Improved disease resistance is observed for rusts, Fusarium and Drechslera. After the very hard winter 2010/11 we had an excellent proof of the extremely high Fusarium resistance of Double.

Perfect mixture partner
As DOUBLE is less dense than top-quality diploids it makes it easier for Poa pratensis to establish. When combined with diploid perennial ryegrass a perfect overseeding mix is obtained. In mixtures with tall fescue the larger leaves of DOUBLE compared to diploids leads to a more homogeneous aspect.

Improved salt tolerance
DOUBLE has better salt tolerance than most diploids. Have DOUBLE in mind when establishing new turf areas!

Superior in dry conditions
Ideal mixture partner (overseeding...)
Allround disease resistance
4n = Big seed - strong seedlings

Relative scores for drought tolerance DLF trial sites in Les Alleuds and Carpentras (France)
Variety	Les Alleuds (Loire region)	Carpentras (South of France)
Diploid Lp (mean of 3 varieties)	100	-
Diploid Lp (mean of 6 varieties)	-	100
4TURF (mean of 3 varieties)	133	119

BSPB Turfgrass Seed List

DLF is proud to have some of the highest STRI rated cultivars, meaning you can feel confident that your turf grass seed has the best chance at creating the elite facilities you are looking for. BSPB is a trade association providing accurately analysed and independently supervised trials for turf seed companies.

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Latest news

07/10/2025

DLF helps Bristol Golf Club create the right first impression on and off the course

Despite a year of challenging weather, Bristol Golf Club has seen a remarkable improvement in its playing surfaces and overall visitor experience thanks to innovative seed solutions from DLF. The team, led by Course Manager Dave Taylor, introduced Johnsons J 4Turf 50 across all 27 tees in early 2025 which has gone on to demonstrate outstanding resilience and strong performance, coping with the pressures of a busy championship course.

19/09/2025

Disease watch by DLF

As pesticide regulations tighten and climates shift, the need for disease-tolerant turf varieties has never been greater. Consequently, we rigorously test and select varieties with strong natural resilience. By continuously developing new tolerant grasses and tracking long-term disease trends through our annual surveys, we’re helping our customers stay one step ahead. We build strong turf for the future.

18/09/2025

Champion Greens: DLF Seeds Leads the Bowls Green Revolution at Groundsfest

More than 80 bowling greenkeepers packed into Groundsfest’s inaugural Champion Greens: The Bowls Greenkeeper’s Masterclass — an information-packed day designed to support clubs from flat to crown green.