Asked by: Sherly Kemper
asked in category: General Last Updated: 15th March, 2020

When should I prune Achillea?

After flowering is complete, and autumn turns to winter, achillea should be cut back to ground level preferably before the plants go completely dormant and the old flower spikes turn brown. Avoiding wasting energy on setting seeds is just as important in these plants as the more obvious ones like lupins or delphiniums.

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Accordingly, should I prune Achillea?

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. Prune back to the basal leaves again in late fall or early winter. The basal leaves will help protect the yarrow plant during the winter.

Similarly, should yarrow be cut back? Cut back yarrow to within 6 inches of the ground after it has finished flowering. In colder climates, cut it back as one of the last chores in your garden before the snow flies. In warmer climates, cut it back in the spring before it begins to bud.

Thereof, will Yarrow rebloom if cut back?

Trim the yarrow back by half after each subsequent flower flush through summer and into fall. Yarrow typically flowers twice, but the second bloom may not occur all at once so cutting back individual stems as needed keeps the plants tidy and attractive.

How do you keep Yarrow from falling over?

The yarrow plant tends to flop or fall over, especially if it gets too tall and spindly. You may need to stake such plants as they grow. Bury one end of the stake 1-2 inches away from the base of the plant, then tie the middle of the plant's stem to the stake with string or twine.

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