Gardening Questions And Answers
Most likely, common yarrow, Achillea millefolium originated in Asia and spread out from there a long time ago. It is a moderately weedy plant that grows well in disturbed sites. Natural disturbed sites are found where rivers and lakes rise and fall or where big animals congregate, for example at watering holes.
Simply take a pair of pruning shears and cut the stem back above a lateral bud. Cutting back yarrow will help maintain plant health and vitality, as it will encourage new growth with stronger stems with the potential for additional fall blooms. Prune back to the basal leaves again in late fall or early winter.
Yarrow first blooms in late spring or early summer. Many species will continue to bloom intermittently into fall. One example is Summer Pastels Mix (Achillea millefolium), which blooms in shades of red, pink, lilac and salmon from summer through early fall. Moonshine has sulphur-yellow flowers that bloom all summer.
When cutting back yarrow, you may want to consider pruning it back by at least half, given the plant’s propensity to be floppy and tip over. Prune the entire stem to the lower basal foliage (the foliage at the bottom of the stem, down by the ground) after all the spring/early summer blooms are done.
Yarrow Care – Growing Yarrow Herb In Your Garden. The yarrow plant (Achillea millefolium) is an herbaceous flowering perennial. Whether you decide to grow yarrow in your flower beds or in your herb garden, it’s still a lovely addition to your yard. Yarrow care is so easy that the plant is virtually care-free.
Powdery mildew is another fungal disease that is often described as a white powder on the leaves. Several cool humid nights and warm dry days in a row help promote the outbreak of this disease. Powdery mildew tends to be worse on plants growing in shade. There are many fungi that can cause powdery mildew.
Yarrow flowers will become faded and brown over the course of their growing season. You will want to deadhead these unattractive spent flowers not only for aesthetic reasons, but also to encourage further blooming. This deadheading, or yarrow trimming, is advocated because yarrow is an aggressive self-sower.
Aphids, striped and spotted cucumber beetles, flea beetles, and lygus bugs are also attracted to yarrow, but, in this case, that’s a good thing. First, it means they are not on your tomatoes. Second, those particular aphids are destined to be eaten by the larval forms of all those beneficial insects!
The yarrow blooms can grow thick and dense, so this avoids overcrowding. The yarrow plant is very drought-tolerant and does not need to be watered regularly. In fact, too much watering can cause stem rot. Only water if the soil is dry or if the plant appears wilting or brown, due to insufficient water.