Ants and Yarrow

CarolG added on June 9, 2012 | Answered

We have a lot of ants in our garden, and they seem partial to make their nests under the yarrow plants. Is this common? These plants are not doing well. Thanks

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Certified GKH Gardening Expert
Answered on June 19, 2012

It is likely the plants are being affected by aphids. They are very small insects that suck the sap out of the plant. The ants use aphids like cows, and will "milk" them for the sweet honeydew they excrete. The ants will set up a colony near the aphid population to make the trip to care for them shorter.

This article will help with the aphids:

Once the aphids are gone, this article will help with the ants:

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