Things You'll Need:
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Step 1
Deadhead the flowers, if desired, as they fade. You may cut the flower stalks down to foliage levels at all times of the year.
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Step 2
Prune only in the fall, after frost has taken the plant out. Use the shears to bring the plant down to within 6 inches of ground level.
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Step 3
In the spring, protect new growth from late frosts with mulch if needed. New growth does not like freezing temperatures, but the dormant plant is cold hardy.













