To propagate dusty miller, you can take stem cuttings in the spring and place them in moist potting mix. You can also propagate dusty miller from seed. 

Steps for propagating dusty miller from stem cuttings

  1. Select a healthy, non-flowering stem that’s 4–6 inches long 
  2. Cut the stem just below a leaf node using clean, sharp shears 
  3. Remove the lower leaves, leaving only a few at the top 
  4. Dip the cut end in rooting hormone 
  5. Fill a small pot with a well-draining potting mix 
  6. Insert the cut end of the stem into the potting mix, burying it about 1–2 inches deep 
  7. Water the mix to settle it around the cutting 
  8. Keep the cutting moist and warm until new leaves grow 
  9. Transplant the cutting as desired 

Tips for propagating dusty miller

Cuttings root faster in water than in soil, so you can also propagate dusty miller in water 

You can rub aloe vera gel on the cutting to encourage roots  Dusty miller prefers full sun and well-draining soil