How to Grow Caryopteris 'Sunshine Blue'

Wikimedia Commons

Caryopteris 'Sunshine Blue'

Caryopteris clandonensis 'Sunshine Blue'

shrub

Caryopteris 'Sunshine Blue' is a compact deciduous shrub prized for its vibrant blue flowers and golden-yellow foliage. This hybrid cultivar combines ornamental appeal with exceptional hardiness, producing aromatic, clustered flowers that attract pollinators throughout late summer and fall.

When should you plant Caryopteris 'Sunshine Blue' in your zone?

Get a personalized planting timeline — when to start seeds, transplant, and harvest — based on your USDA zone and local frost dates. Free to start.

Get my Caryopteris 'Sunshine Blue' timeline →

Example Caryopteris 'Sunshine Blue' timeline · Pittsburgh, PA (Zone 6b)

Plant Caryopteris 'Sunshine Blue'
Around Apr 17

Near Pittsburgh's average last spring frost.
Tend & protect
Late spring–summer

Watering, feeding, and pest-watch reminders.
Harvest Caryopteris 'Sunshine Blue'
Late summer into fall

Before the first fall frost (≈ Nov 8)

Sample dates for Pittsburgh, PA. Sign up to get exact Caryopteris 'Sunshine Blue' dates for your own zip code.

Growing Conditions

☀️

Sun: Full sun, 6-8 hours daily; tolerates partial shade but foliage color and flowering diminish

💧

Water: Moderate watering when establishing; once established, drought-tolerant. Water during dry spells, avoid waterlogging. Prefers drier conditions over wet.

📏

Spacing: 36 inches

📅

Days to maturity: Full mature size 2-3 years

🌱

Planting depth: Plant at same depth as root ball; top of root ball should be level with soil surface

Soil

Type: Well-draining loamy soil, tolerates poor soil conditions

pH: 5.5-7.5

Amendments:

Compost for initial planting Perlite or sand for drainage in heavy clay Aged mulch to retain moisture

Growing Zones

Find your zone →

Thrives in zones 5-9, with best performance in zones 6-8

5a 5b 6a 6b 7a 7b 8a 8b 9a 9b

Get my Caryopteris 'Sunshine Blue' timeline →

Growth Stages

Establishment

First 4-6 weeks after planting

Young plant with limited branching and emergent golden foliage; new growth appearing

Water regularly to establish deep roots. Apply 2-3 inches of mulch around base, keeping away from stem. Prune lightly to encourage branching.

Vegetative Growth

Spring through early summer (8-12 weeks)

Shrub develops compact, mounding habit with increasingly dense golden-yellow foliage and aromatic leaves

Continue moderate watering. Allow shrub to develop natural shape; light pruning to maintain form. Fertilize monthly with balanced fertilizer if desired.

Pre-flowering

Mid-summer (2-4 weeks)

Dense foliage fully developed, flower buds forming at branch tips, foliage at peak golden color

Reduce watering slightly to encourage flowering. Stop fertilizing to avoid excessive vegetative growth. Remove any dead or crossing branches.

Flowering

Late July through October

Abundant clusters of small, bright blue tubular flowers cover the plant, appearing above golden foliage; highly attractive to butterflies and pollinators

Maintain consistent moisture during blooming. Deadhead spent flowers to encourage continued blooming. Monitor for pests attracted to flowers.

Dormancy

November through March

Plant dies back after frost; foliage turns brown and drops; stems may be cut back or left standing for winter interest

Stop watering after foliage drops. Leave stems standing for winter structure or prune back to 12 inches in late winter for fresh spring growth. Avoid fertilizing.

Companion Planting

Plan your garden →

Plant with:

Sedum Russian Sage (Perovskia) Black-eyed Susan (Rudbeckia) Coreopsis Ornamental grasses (Festuca, Panicum) Lavender Catmint (Nepeta) Butterfly weed

Avoid planting near:

Plants requiring consistently moist soil (hydrangeas, ferns) Moisture-loving shrubs (azaleas, rhododendrons) Shade-loving plants that require protection from direct sun

Common Pests

Spray with water to dislodge; use miticide if severe. Improve air circulation. More common in hot, dry summers.
Yellow sticky traps; insecticidal soap; ensure good air circulation. Usually minor.
Improve air circulation by pruning dense growth. Apply sulfur or fungicide if severe. Avoid overhead watering.
Hand-pick or use pheromone traps. Apply neem oil or insecticide if population is large.

Uses

🌿

Garden focal point and pollinator magnet

Ornamental

The striking combination of golden-yellow foliage and cobalt-blue flowers makes 'Sunshine Blue' an outstanding specimen shrub for borders, mixed gardens, and landscape focal points. Its long blooming period and butterfly-attracting properties provide color and wildlife value from mid-summer through fall. [source]

💊

Traditional herbal uses

Medicinal

Caryopteris has been used in traditional Asian medicine, particularly in Chinese and Japanese herbalism, for various remedies. The aromatic leaves contain volatile oils with potential anti-inflammatory properties. [source]

🏠

Aromatic foliage

Household

The leaves emit a pleasant, spicy-herbal fragrance when brushed or crushed. Some gardeners use dried stems and foliage in potpourri or sachets for their aromatic qualities. [source]

🦋

Nectar source for pollinators

Wildlife

The abundant blue flowers are a major nectar and pollen source for butterflies, bees, and other beneficial insects during late summer when many plants are declining. This makes it invaluable for supporting pollinator populations. [source]

🎨

Cut flower arrangements

Craft

The blue flower clusters are attractive in fresh floral arrangements and can be dried for long-lasting dried arrangements. Cutting stems encourages bushier growth. [source]

This is not medical advice. LizPlants is not a medical resource. Always consult a qualified healthcare professional before using plants medicinally.

Harvest Tips

This ornamental shrub is not typically harvested like vegetables or herbs. Flowers can be cut for fresh arrangements in late summer/fall and will last 5-7 days in water. Cut stems in the morning after dew dries. Leaves are aromatic and can be brushed or crushed for scent but are not culinary. For rejuvenation pruning, cut back to 12 inches in late winter before new growth begins.

Fun Facts

🌱 The name 'Caryopteris' comes from Greek words meaning 'walnut' and 'wing,' referring to the winged seeds that are dispersed by wind.
🌱 'Sunshine Blue' is a patented cultivar selected specifically for its superior golden foliage color combined with bright blue flowers—a color combination rarely seen together in shrubs.
🌱 Caryopteris has been used in traditional medicine in Asia for over 2,000 years and is sometimes called 'bluebeard' or 'beard flower' in common nomenclature.

Gardening Terms

New to gardening? Learn about terms used in this guide:

Cultivar Deadhead Full Sun Hybrid Mulch Partial Shade

Shop Caryopteris 'Sunshine Blue' plants and related plants at Plant Addicts →

Join 30,000 gardeners planning their gardens with LizPlants.

Get your personalized Caryopteris 'Sunshine Blue' planting timeline

Tell us your zip code and we'll calculate exactly when to start Caryopteris 'Sunshine Blue' seeds, transplant seedlings, and harvest — based on your USDA zone and local frost dates. Includes calendar reminders and printable task lists. Free to start.

Get my Caryopteris 'Sunshine Blue' timeline →