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Speedwell

Symptoms

Speedwell appears in lawns as individual plants, inhibiting growth of grass, and, if unchecked, spreads through borders.
Find it on: lawns
Time to act: summer to autumn

Overview

Speedwell (Veronica spp) is an annual weed that spreads through lawns and borders, and has attractive tiny blue flowers. It spreads by seed in spring and autumn to form plants with strong tap roots.
Solution
Speedwell appears in lawns as individual plants, inhibiting growth of grass, and, if unchecked, spreads through borders.
Organic
The best way to tackle speedwell organically in borders is to hoe it before it flowers and sets seed, then remove it or leave it on the soil surface on a hot day to wither and die. In lawns, increase the height of the cut so that it is shaded out by the grass and ensure the sward is dense and healthy so it can compete with the weed.
Chemical
In lawns, spot-treat the weed using a weedkiller such as a 2,4-D-based herbicide in spring or early-summer, when growth is at its most vigorous. Repeat through summer where necessary. Apply in cool, moist, still conditions when there is least risk of the chemical drifting onto and damaging nearby garden plants.



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Talkback: Speedwell
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Ron 01/09/2012 at 09:14

Oh dear! I bought what looks very much like Speedwell though it may not be the wild variety. I'm worried now that it may spread.

Bookertoo 01/09/2012 at 12:42

There are several very good, 'tame' speedwells, which willnot take over your garden.   What does the label say?  If it is 'Georgia Blue' that is a real early spring gem, formng nice low hummocks of blue flowers with reddish stems and leaves when there is little else in the garden.   While it is not unknown for people to sell ferocious plants, such as Russian Vine, sold as fallopia - it is not as common as we might think.  If you are really worried about it, plant it in a pot for this winter and see what it does.