Annual Overview: Dusty Miller



Dusty Miller Stats at a Glance

Botanical Name: Centaurea cineraria

Common Name(s):

Height: 1-1 ½ feet

Soil Conditions: Well-drained

Sun: Full sun

Soil pH Conditions:


Notes: Dusty Miller is a tender perennial that overwinters in mild climates.

Best use: Dusty Miller’s subtle silvery white coloring and mounding habit make it the perfect plant to intersperse in a colorful flower garden or to use as a border.

Starting Dusty Miller from Seed

To start indoors, fill individual peat pots with a fertile commercial soil starter and moisten.  Cover the seeds lightly with soil, as they need darkness to germinate.  Place in a room with a constant temperature of 70-75°F.  Cover with clear plastic wrap to maintain the soil moisture and temperature.  Keep the soil moist.  When seedlings appear, remove the plastic wrap and move to a sunny location.


When to Start Seeds: Start seeds indoors eight-ten weeks prior to last frost.

Time to Germination: 10-14 days

Light/Dark Requirements: Dark

When to Plant Dusty Miller

Transplant seedlings or purchased plants into the garden following the last frost as soon as the soil temperature reaches 65°F.

Soil Temperature: 65°F

Where to Plant Dusty Miller

Dusty Miller prefers full sun for best results.

Dusty Miller will tolerate nearly any soil condition (clay, sand, acidic, and loam) as long as it is well-drained.

Dusty Miller Plant Spacing

Plant 6-12” apart.

Dusty Miller Care and Maintenance

Dusty Miller is fairy drought tolerant and should not be overwatered. The plant is prone to rots in overly wet soil.

Remove blooms to encourage leaf proliferation.

Tall, leggy plants should be sheared in midsummer to encourage fullness.

Dusty Miller Diseases

There are no major diseases of this plant as long as conditions not too wet.  If placed in wet conditions is susceptible to root and stem rots.

Dusty Miller Pests

The most common pests associated with dusty miller include nematodes. Snails and slugs may also infest this plant.

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