Identifying Common Lawn Weeds

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Most lawn weeds are easy to spot-they are not grass. Others might be grass, but not the right grass! Common and unwanted lawn weed grasses are the tussock-forming rough grasses, running, spreading knotgrasses, and the annual seeding grasses. The first and second sorts are usually found in neglected lawns and annual seeding grasses in well-maintained but heavily cut and worn lawns, where they appear in the worn patches. Mosses are only usually a problem if a lawn has poor drainage or shade, or the sod is not healthy enough to out-compete it. They are easy to spot as they look like shreds of wool.

In very wet and acid soils, rushes (Luzula campestris), with their round, grass-like stems, move in. Clovers (Trifolium spp.), with their distinctive three-lobed leaves and pompom flowers loved by bumblebees, are common lawn weeds. They can be spotted easily when the grass browns because patches of clover stay green. Similar are the trefoils and yarrow (Achillea millefolium), with its silvery leaves.

Then there are the tap-rooted and rosette-forming weeds, such as docks, dandelions (Taraxacum officinale), plantains (Plantago spp.), and thistles (Cirsium or Sonchus spp.). Regular cutting often fails to remove them from closely cropped lawns
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Lawns on acid soils with fine-bladed grasses often get speedwell (Veronica filiformis) infestations, which, although their little flowers are pretty, are hard to treat. Wetter acid soils may be choked with buttercups (Ranunculus spp.) andifa lawn is too closely cut it will tend to have a lot of daisies (Bellis perennis).