Dusty Miller in Zone 4a & 4b
Senecio cineraria
When to plant dusty miller in zone 4b
Zones 4a and 4b share the same average frost dates in our data, so this page covers both.
Method: Start indoors: Start indoors from seed, then transplant outside. Dusty Miller needs a head start most zones can't give it by direct-sowing alone.
| Start indoors | Mar 13–Mar 20 |
|---|---|
| Direct sow / transplant outside | May 22–May 29 |
| Estimated bloom | Aug 20–Aug 27 (~90 days after transplanting) |
Spacing: 4 per square foot (square-foot-gardening spacing). Mature height: 0.5-1 ft.
Dusty miller is grown for its silvery, felted foliage rather than for any flower, a classic bedding and container plant that also earns a spot as a fresh-cut filler that softens bolder bouquet colors.
How dusty miller fits zone 4's season
Zone 4b's frost-free window runs about 128 days, from May 15 to September 20. Dusty Miller needs about 90 days from transplant to first harvest.
Good companions
No standout companions recorded yet for Dusty Miller.
Where to buy dusty miller seeds
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See it growing
Search YouTube for "growing dusty miller" videos → (a live search, not a hand-picked video; results vary and aren't vetted by us)
← Back to the full zone 4b calendar · Full companion planting guide · Full plant profile · Plan your beds in the Garden Designer →
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Growing Dusty Miller in USDA zone 4b: when to start seeds indoors, when to direct-sow, and when to expect a bloom.
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