Troubleshooting
Dalmatian Chrysanthemum problems — and how to fix them
Dalmatian Chrysanthemum (Tanacetum cinerariifolium) is generally forgiving once you match its basics, but a few issues come up again and again. Here is what each one looks like, why it happens, and the fix.
Aphid infestations
Soft new growth attracts aphids in spring. Somewhat ironic given the plant's insecticidal chemistry — aphids may colonise before pyrethrin builds up. Blast off with water or apply insecticidal soap early.
Root rot in wet soils
The primary cultivation problem. Ensure drainage is sharp; add grit to clay soils. Do not mulch heavily around the crown in winter.
Short-lived in heavy soils
Plants typically persist 3–5 years in ideal conditions but decline quickly on compacted or moist soils. Divide clumps every 2–3 years in spring to reinvigorate and prolong the planting.
Prevent dalmatian chrysanthemum problems before they start
Most dalmatian chrysanthemum issues are care-mismatch, not bad luck. Dial in the basics:
Dalmatian Chrysanthemum problems — FAQ
Why is my dalmatian chrysanthemum aphid infestations?
Soft new growth attracts aphids in spring. Somewhat ironic given the plant's insecticidal chemistry — aphids may colonise before pyrethrin builds up. Blast off with water or apply insecticidal soap early.
Why is my dalmatian chrysanthemum root rot in wet soils?
The primary cultivation problem. Ensure drainage is sharp; add grit to clay soils. Do not mulch heavily around the crown in winter.
Why is my dalmatian chrysanthemum short-lived in heavy soils?
Plants typically persist 3–5 years in ideal conditions but decline quickly on compacted or moist soils. Divide clumps every 2–3 years in spring to reinvigorate and prolong the planting.