Yarrow makes a nice addition to cut flower vases and dried flower arrangements. … 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. Spread a 2-inch-thick layer of mulch around the plants to insulate the roots. Can I prune to half height, when do I trim it lower, how far and, in spring or late fall? Seed formation takes a lot of energy from the plant – energy that could be better used to create more flowers. The leaves themselves are finely dissected and form tight mats of foliage. I believe you can cut it back to the ground after blooming to keep the foliage neater, and it may even send out small blooms again. I've had success with the following: I cut back all my cat … Discard the pruned flowers in a green waste bin rather than leaving them in the bed. Pruning yarrow plants (Achillea millefolium) is an important aspect of their care because it keeps them looking healthy and tidy all year long. In the fall, you should cut the yarrow plants to the ground. Removing the spent blooms will prevent the yarrow flowers from drying out, going to seed and spreading all over your garden. Alternatively, you can leave the seed heads over-winter to form an architectural effect, then cut back in early Spring. For flower arrangements, cut before the pollen ripens. She has nearly 25 years of experience in the propagation and care of plants., North Carolina State University Cooperative Extension Service: Achillea millefolium, National Gardening Association: Yarrows: Plant Care and Collection of Varieties. It is from these lateral buds that side flower shoots are produced. Yarrow grows vigorously all summer long, sending up 1- to 3-foot-tall flower stalks from a dense mound of fern-like basal leaves. The basal leaves will help protect the yarrow plant during the winter. Cut back yarrow to within 6 inches of the ground after it has finished flowering. Do you cut back Yarrow? I usually leave 6-inch stubs so I can find the plants next spring. It is also an attractive plant to gardeners because it is low maintenance, drought resilient and relatively pest free. 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. An overgrown potentilla can be cut back in early spring to rejuvenate. Yarrow; How to Cut Back Perennials. I usually get about three blooms out of my salvia throughout the summer and into the early fall. To stimulate new growth and enhance the appearance of yarrow, it is recommended that you cut the stems down to 1-2 inches above the surface after its first winter. For plants that are frost-sensitive, wait until after the plants have gone through several hard frosts to ensure they’re dormant before cutting back. I leave a little clump of leaves. By the second or third bloom, you may want to give your plants a little plant food to give them a boost and add energy for the rest of the season. I live in central Virginia and the yarrow is just about finished blooming. This renewal pruning is a dramatic, often scary step for a new gardener but well worth the effort as it provides a two season bloom period. Cut back the leaves to 6 inches, and dispose of the foliage, rather than composting it. All yarrow varieties benefit from deadheading throughout the blooming season, as well as cutting back in autumn to make room for the next season's growth. If you aren't cutting the flowers for floral arrangements, then you want to deadhead spent flowers to keep the yarrow flowering. Pruning a yarrow plant during the summer if rainfall is less than 1 per! 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