J Ultrafine Rye 100

Pure ultrafine ryegrass for fine turf renovations

J Ultrafine Rye 100 is a specialist 100% ultrafine perennial ryegrass mixture developed for grass tennis courts that demand exceptional wear tolerance, rapid establishment and a consistently true playing surface. Using four of the finest, highest-rated fine turf perennial ryegrass cultivars, this blend produces an exceptionally dense, fine-textured sward capable of withstanding the concentrated footfall and abrasive wear typical of baseline, service box and movement-intensive areas on grass courts. Unlike standard ryegrass mixtures, which may contain coarser-leaved varieties, J Ultrafine Rye 100 delivers uniformity across the entire court, critical for predictable ball bounce and smooth footwork. A turf surface is only as refined as its coarsest component, and this premium formulation ensures superior fineness, consistency and resilience throughout the playing season.

With outstanding recovery and excellent performance under close mowing, J Ultrafine Rye 100 is ideal for court renovation, in-season overseeding and targeted repairs in high-wear zones, such as baselines, run-off areas, and training courts.

100% Ultrafine Ryegrass for Premium Surface Quality
Exceptional Wear Tolerance & Rapid Establishment
High Shoot Density
Close-mown Tolerance Down to 5mm
Reliable All-Season Growth

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Cultivars	%	STRI Rating	Species
Gwynett	25%	7.3	Perennial Ryegrass
Clementine	30%	7.5	Perennial Ryegrass
Chloe	20%	7.2	Perennial Ryegrass
Chardin	25%	7.0	Perennial Ryegrass

Sowingrate - 35-75g/m²

Oversowing - 25-75g/m²

Mowing height -Down to 5mm

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

29/06/2026

Drought-tolerant Johnsons mixtures stand up to the coastal challenges at North Wales Golf Club

Located on the exposed Llandudno coastline, North Wales Golf Club has been shaped by the elements since its establishment in 1984. The traditional links course faces relentless wind, sand splash, naturally free-draining conditions and increasing pressure from dry summers – making drought tolerance a critical consideration when it comes to the clubs choice of grass seed. Demonstrating outstanding resilience and tolerance of both high traffic and the climatic conditions site-wide are mixtures from Johnsons Sports Seed.

27/05/2026

Abersoch Golf Club weathers coastal challenges with Johnsons J Sustain Fairway

Perched on the Welsh coastline, Abersoch Golf Club has always lived at the mercy of the elements. Managing those ever-changing conditions for the last 37 years is Head Greenkeeper Arthur Evans who, in recent years, has found a combination of the right grass seed mixture and expert advice has transformed the condition and resilience of the 18-hole course - that combination being Johnsons J Sustain Fairway from DLF.

15/04/2026

Johnsons Sports Seed delivers performance under pressure at Bristol University

As a busy multi-sport facility, resilience of surfaces at Bristol University isn’t a luxury – it’s a necessity. Helping Grounds Manager Matt Carroll deliver consistent, high-quality pitches for winter and summer sports are mixtures from the Johnsons Sports Seed range, producing performance he and his team of four can rely on season after season.

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.