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|Botanical Name||Jacobaea maritima|
|Common Name||Dusty miller, silver ragwort|
|Plant Type||Hardy annual|
|Mature Size||6 to 18 inches|
|Sun Exposure||Full sun|
|Soil Type||Average and well-drained|
|Soil pH||5.5 to 6.0|
|Hardiness Zones||7 to 10|
|Native Area||Mediterranean region|
Dusty miller needs full sun to stay compact. Plants growing in shade are leggy and produce fewer of the hairs that give them their silvery color.
Dusty miller plants adapt to a variety of soils, but good drainage is key for healthy plants. Whether your soil is on the rocky side or is characterized by clay, you can improve both your pH and drainage by amending it with compost.
The fuzzy growth that gives dusty miller its sheen also helps plants stand tall in periods of drought. Like other plants that hail from Mediterranean climates, dusty miller can get by with occasional watering once it is established. A layer of organic mulch will make plants even less dependent on supplemental irrigation. One inch of water per week is enough to keep dusty miller growing strong.
As a Mediterranean plant, dusty miller thrives in hot, sunny climates. Excessive humidity isn't a problem as long as plants have adequate spacing and a position in full sun.