Cineraria silver dust, also known as dusty miller, is a plant grown for its attractive grey to white foliage. It grows to 1-foot tall with an equal spread, making it an interesting companion plant for your spring and summer flowers. Cineraria silver dust is a tender perennial but treated as an annual when grown outside of its U.S. Department of Agriculture hardiness zones 8 through 10. In mild winter areas it is possible to overwinter the dusty miller and have it return in the spring.
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Things you need
- Pruning shears
- Mulch or pine boughs
Cut the dusty miller's foliage to the soil before the first frost.
Pile 6 inches of mulch over the plant's crown. Straw, dried leaves or pine needles are ideal. You can also use pine boughs, which are heavier and won't blow away as easily.
Check the dusty miller periodically over the winter to make sure that the mulch remains in place. Add more if needed.
Rake back the mulch after all danger of frost has passed.
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