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27 September 2026
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Weed spotlight: Pearlwort - Sagina procumbens
As autumn brings increased rainfall and higher surface moisture levels, pearlwort becomes more noticeable on many sports turf surfaces.
Often mistaken for moss, this low-growing weed forms dense green mats that can invade thin, stressed turf.
Pearlwort thrives in compacted, wet and poorly drained areas, making it particularly common on golf greens, fine turf surfaces and worn sections of sports pitches. It spreads through creeping stems that root readily and produces small white flowers throughout much of the growing season.
Why does it appear?
Pearlwort is typically a sign that growing conditions are favouring weeds over grass. Common causes include:
- Soil compaction
- Poor drainage
- Excessive surface moisture
- Thin turf cover
- Close mowing and turf stress
Management and control
There is no substitute for encouraging a healthy, competitive sward. Cultural management remains the most effective long-term approach to reducing pearlwort populations.
Key practices include:
- Regular aeration to relieve compaction and improve root development
- Improving surface and subsurface drainage
- Maintaining turf density through overseeding programmes
- Applying balanced nutrition to support vigorous grass growth
- Managing thatch and organic matter accumulation
- Avoiding unnecessary stress on the grass plant
Where populations are severe, managers should focus on identifying and correcting the underlying causes that favour pearlwort establishment. Improving growing conditions for the desired turf species will naturally increase competition and limit the weed’s ability to persist.
Autumn is an ideal time to tackle these issues. By addressing compaction, drainage and turf density now, turf managers can significantly reduce pearlwort populations and improve surface quality, playability and resilience heading into the next growing season.
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