Gardening
in Tucson, Phoenix,
and Southern California

Gardening in Tucson, Phoenix, and Southern California

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Conoclinium greggii: Palmleaf Thoroughwort / Gregg's Mistflower

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Description
Form: Herb.
Lifespan: Perennial.
Growth rate: Moderate.
Mature Size: 1-2' high.
Flowers: Light blue to purple, clustered at stem tips, no petals, long threadlike stigmas have fluffy appearance.
Bloom: Spring through fall.
Fruit: Seed.
Leaves: Finely divided, green.
Stems: Long, weak, green to brownish. No thorns.
Roots: Spreads by rhizomes to form colonies. Not overly invasive and easily eradicated.
Wildlife: Male Queen and Monarch butterflies are drawn to this plant and use a chemical in its nectar to attract females. Most attractive to butterflies in part shade. Browsed by mammals. Enclose within rabbit proof fence 18" high for best results.
Toxic / Danger: Not reported.
Origin: Arizona through Texas and Mexico.

Cultivation and Uses
USDA hardiness zones: 7-10.
Heat tolerant: Yes.
Drought tolerant: Yes.
Sun: Full sun to part shade.
Water once established: Low water in part shade or moderate water in full sun.
Soil: pH 6.6-7.8 (neutral to slightly alkaline). A desert plant often found alongside dry stream beds.
Prune: Cut back in winter or cut to ground. Pull out to eradicate.
Litter: Low.
Propagation: Seed or root division. Plant reseeds easily.
Uses: Outstanding butterfly attractor if Queen or Monarch butterflies visit the area.

Comments
Former scientific names: Eupatorium greggii and Conoclinium dissectum. Long blooming. Look carefully, and you will see four Queen butterflies in the center picture.



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