Yellow Yarrow Grew Too Tall

I have several colors of yarrow in my butterfly garden and I save old pantyhose and cut off one leg and use this to tie around the plant when it starts to fall over. It lasts for at least one season and the beige colors don't seem to "stick out" in the flower garden.

We've tied our plants using fishing line; it's inconspicuous and strong. Put up a few stakes and tie the line in a few rows across the front of the plants and that should keep them standing.

Yarrow does best on dry sites in full sun. Yarrow will grow taller if grown in partial shade or soggy soil, which makes them tend to fall over. Wind can also cause them to fall. In such cases they need to be staked and tied.

Alternatively you can support them with tomato cages but the problem is tomato cages look like tomato cages. You can get a plant support that is green and not as obvious, there are different shapes and sizes. Here is a picture of a round support.
http://www.plantsupports.org/plant-support/double-plant-support-ring.html