Also known as Blue Beard · Blue Mist · Blue Spirea
Blue mist spirea (Caryopteris x) is a deciduous shrub known for its late summer blue or purple flower clusters, attracting pollinators.
At-a-glance light, water, soil, and growing conditions from plant data
Full Sun
100% intensity
Prefers at least 6 hours of direct sunlight daily for best flowering.
Moderate
50% intensity
Allow soil to dry slightly between waterings. Drought-tolerant once established.
Well-drained, Loamy, Sandy
50% intensity
Moderate
50% intensity
Prefers average room temperatures (18-24°C). Can tolerate slightly cooler temperatures.
Low
25% intensity
Fertilize lightly in spring. Avoid over-fertilization.
Safety information from plant toxicity data
| Attribute | Value |
|---|---|
| Toxic for humans | No 0/5 intensity |
| Toxic for pets | No 0/5 intensity |
| Edible | No |
Key traits and growing stats from plant data
Watering, pruning, propagation, and repotting details from plant data
Water moderately during the growing season, allowing the soil to dry slightly between waterings. Reduce watering in fall and winter.
Blue mist spirea prefers well-drained soil and is drought-tolerant once established, so avoid overwatering which can lead to root rot.
Prune in late winter or early spring, before new growth emerges. Cut back stems by about one-third to one-half to encourage a compact, bushy shape and abundant flowering.
Deadheading spent blooms can prolong the flowering period and improve appearance.
Propagate from semi-hardwood cuttings taken in mid-summer. Select healthy shoots, take cuttings 10-15 cm long, and remove lower leaves. Dip in rooting hormone and insert into a well-draining potting mix.
Keep moist and in a warm location.
Repot young plants every 1-2 years in spring as needed to provide fresh soil and accommodate root growth. Mature plants in the ground rarely need repotting.
Ensure the new pot has adequate drainage holes and use a good quality, well-draining potting mix.
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Monthly activity intensity for bloom and fruit across both hemispheres.
Flowering & fruiting calendar
Flowering & fruiting calendar
Photos of Blue Mist Spirea (Caryopteris x)
Common names and botanical synonyms
Botanical classification
| Rank | Name |
|---|---|
| Family | Lamiaceae |
| Genus | Caryopteris |
| Species | Caryopteris x |
Similar in genus Caryopteris
Answers based on plant encyclopedia data
