Caryopteris x clandonensis (Caryopteris clandonensis) care guide

Caryopteris x clandonensis is a compact, deciduous woody shrub in the mint family, Lamiaceae. It is commonly grown for fragrant blue flowers, aromatic foliage, drought tolerance, and late-season pollinator value.

Caryopteris x clandonensis grows best in full sun, with at least 6 hours of direct sunlight daily. More sun generally produces a fuller plant and better flowering.

Water Caryopteris x clandonensis regularly during its first growing season, then reduce watering once the roots are established. It tolerates drought, but prolonged extreme dryness can reduce growth and flowering.

Caryopteris x clandonensis is generally grown in USDA Zones 5 through 9, although winter survival varies by cultivar and site. In colder areas, the roots may survive even when the stems die back.

Caryopteris x clandonensis typically reaches about 2 to 3 feet tall and wide. Annual hard pruning and winter dieback can make the plant appear smaller in colder climates.

Plant Caryopteris x clandonensis in loose, well-drained loam. It tolerates moderately poor soil, but consistently wet or poorly drained soil can cause crown rot.

Caryopteris x clandonensis can grow in clay soil if drainage is improved. Amend the planting area as needed or place the plant in a raised or slightly elevated site to prevent waterlogging.

Caryopteris x clandonensis is drought tolerant once established. Water it during prolonged hot, dry periods, especially if the plant is young or growing in sandy soil.

Caryopteris x clandonensis may survive in light partial shade, but full sun is preferable. Too little light can produce lanky growth and fewer flowers.

Caryopteris x clandonensis is generally considered deer resistant. Deer resistance is not absolute, particularly when other food is scarce.

Yes, Caryopteris x clandonensis attracts bees, butterflies, and other beneficial pollinators. Its fragrant blue flowers are especially valuable in late summer and early fall, when fewer shrubs are blooming.

Prune Caryopteris x clandonensis in late winter or early spring before new growth begins. The plant flowers on new wood, so hard spring pruning does not prevent its normal summer or fall bloom.

Cut Caryopteris x clandonensis back to about 6 to 12 inches above the ground in late winter or early spring. Remove dead stems and any weak or damaged growth while retaining a sturdy framework if stems survived winter.

Insufficient sunlight, excessive fertilizer, drought stress, or severe establishment problems can reduce flowering on Caryopteris x clandonensis. Because it blooms on new growth, avoid expecting flowers before the plant has produced substantial spring and summer growth.

Caryopteris x clandonensis can become leggy when it receives too little sun or is not pruned in late winter or early spring. Hard annual pruning encourages a denser, more compact flush of new stems.

Caryopteris x clandonensis usually needs little fertilizer when planted in reasonably fertile soil. Excess fertilizer can encourage weak, lanky growth instead of a compact habit and abundant flowering.

Caryopteris x clandonensis generally has few serious pest or disease problems. Crown rot is the main concern and is most likely when the soil remains wet or drains poorly.

Plant Caryopteris x clandonensis in spring or early fall in the United States. Spring planting is preferable in colder regions because it gives the roots a full growing season to establish before winter.

Space Caryopteris x clandonensis about 2 to 3 feet apart for individual shrubs, or closer for a denser mass planting. Allow enough room for the mature plant to reach roughly 3 feet wide.

Caryopteris x clandonensis can grow in a container if the pot has drainage holes and the soil drains freely. Container plants dry out and experience colder roots more quickly than in-ground plants, so they need closer winter and summer monitoring.

Caryopteris x clandonensis is generally easy to transplant when moved during mild weather. Replant it at the original depth, water thoroughly, and keep the soil moderately moist while new roots develop.

Caryopteris x clandonensis is commonly propagated from softwood cuttings taken during the growing season. Cultivars should not be relied on to come true from seed, so cuttings are preferred when an identical plant is wanted.

Caryopteris x clandonensis can produce seed, but seedlings may vary from the parent plant, especially when the plant is a named hybrid cultivar. Use cuttings for more predictable results.

Caryopteris x clandonensis is listed by the ASPCA as non-toxic to dogs and cats. Even plants considered non-toxic can cause mild stomach upset if eaten, so contact a veterinarian if a pet shows symptoms after ingestion.

There is no reliable specific toxicity classification establishing Caryopteris x clandonensis as poisonous to people. Avoid eating ornamental plant material, and seek medical advice if ingestion causes symptoms or if the plant was treated with chemicals.

Caryopteris x clandonensis usually blooms from late summer into early fall, often from July through September. Bloom timing varies with cultivar, climate, pruning, and the length of the growing season.

Caryopteris x clandonensis produces clusters of blue to blue-purple flowers. The small flowers form airy, cloudlike groups around the upper leaf axils and stems.

Yes, Caryopteris x clandonensis has fragrant flowers and aromatic foliage. The foliage releases its scent most noticeably when brushed or crushed.

Caryopteris x clandonensis can be used as a cut flower and as a foliage or filler plant. Cut flowering stems when the flower clusters are opening for the best display.