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What exactly does Yarrow look like and what is the best way to treat it without harming my lawn grasses?

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Expert Answer

Yarrow is a common weed of pastures, roadsides, gardens and waste places. It has feathery branched leaves and sends up a flower stalk topped with a disc of white or pink flowers. It spreads easily by sending out rhizomatous roots from which new plants grow forming a dense mat of weed.


In garden beds

To control yarrow in garden beds, treat it with McGregor’s Weed Out, it is systemic and kills weeds down to the root with a visible brown off period of 7-14 days and is an ideal product for use around established trees and shrubs. It is inactive in the soil so planting can be safely carried out soon after treatment. For best results apply in spring and autumn when weeds are growing, control before flowering and seeding to prevent similar problems the following year.

In lawns

Apply a selective herbicide such as McGregor’s Lawn Weed Control as it will effectively control yarrow and other broadleaf weeds but will leave lawn grasses unaffected. For best results use in spring and autumn when weeds and turf are growing.

In paths and driveways

For long term control on paths and driveways use McGregor’s Path and Patio Weed Control, one application kills existing weeds and prevents seeds from germinating for up to 12 months; for best results apply spray in spring and autumn when weeds are growing.


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