J 4Turf 50

For winter sports pitches, racecourses and high wear turf

J 4Turf 50 is a powerful, high-performance grass seed mixture designed for winter sports pitches, racecourses, and all high-wear turf environments. Built around market-leading 4turf® tetraploid perennial ryegrass, this blend delivers superior turf resilience, rapid establishment, even at soil temperatures as low as 3–10°C and exceptional recovery during periods of intense use. The mixture combines advanced tetraploid genetics with elite diploid cultivars to produce a dense, durable, and visually attractive sward. Its enhanced stress tolerance and strong rooting capability make it especially well-suited for autumn and winter overseeding programmes, where reliability and speed of establishment are critical.

Whether preparing a racecourse rail, renovating a winter training pitch, or maintaining a heavily used natural turf surface, J 4Turf 50 is engineered to deliver consistent, proven performance.

Rapid Establishment in Cold Conditions
Outstanding Wear Tolerance
Enhanced Disease Resistance
Improved Stress Tolerance & Rooting
Consistently High Turf Quality

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Cultivars	%	STRI Rating	Species
Fabian	25%	5.9	Tetraploid Perennial Ryegrass
Tetrastar	25%	5.4	Tetraploid Perennial Ryegrass
Gildara	25%	7.7	Perennial Ryegrass
Columbine	25%	7.4	Perennial Ryegrass

Sowing rate - 35-75g/m²

Oversowing - 10-50g/m²

Mowing height - Down to 18mm

BSPB Turfgrass Seed Booklet

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.

Explore the Turfgrass Variety List

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.

26/08/2025

The Power of Botanical Balance

The spring of 2025 was the hottest and driest on record. Four heatwaves, rainfall 40% below the average and soaring evapotranspiration have left reservoirs low and much of England officially in drought. For turf managers, this isn’t a one-off challenge — it’s the new pattern. Fairways, in particular, have taken a hit with heavy traffic and hydrophobic ‘dry patch’ soils slowing recovery and reducing the overseeding window. Beneath the surface, next season’s outcomes are already being decided so what can you do create surfaces than not only survive, but thrive? Stuart Yarwood, Regional Technical Manager at DLF Seeds explores.

05/08/2025

Sustainable Seeds and Science at the DLF Stand at GroundsFest 2025

The DLF stand at GroundsFest 2025 will showcase a wide range of sustainable solutions from the world's largest grass seed breeder, featuring products from MM, Johnsons Sports, Masterline and Designer Seed brands. Alongside leading cultivars for sports and amenity turf, stand 30 will also display an array of colour with demonstration planters from the popular Pro Flora and Colour Boost wildflower ranges.

01/08/2025

Determination, teamwork and Johnsons Sports Seed overcomes destruction at Thorndon Park

It’s every greenkeeper’s worst nightmare – to receive a call informing them of vandalism on the course. That nightmare was the unfortunate reality for David Byron of Thorndon Park who returned from BTME 2025 to discover the ‘destruction’ of six greens, three tees and numerous fairways. With sheer determination, a concerted team effort and the outstanding recovery demonstrated by mixtures from across the Johnsons Sports Seed range, the surfaces were fit and ready for club championships just a few short months later.