Overview
Uses: Foundation plantings, mixed shrub borders, rain gardens, woodland edges, specimen shrub.
Benefits: Extra-large, fragrant white flowers bloom in summer when few shrubs are in peak color. Compact habit with glossy foliage and reliable yellow fall color. Native to North America and attractive to pollinators.
USDA Hardiness Zones: 4–9
Sun: Full Sun to Partial Shade
Life Cycle: Deciduous Shrub
Growth Habit: Rounded, Mounding — dense branching with upright flower spikes.
Bloom Color: White
Foliage Color: Dark Green, maturing to Yellow in fall
Mature Height: 3–6 ft
Mature Width: 3–6 ft
Bloom Season: Summer
Growth Rate: Moderate
Summary
Vanilla Spice® Summersweet fills the garden with rich fragrance and oversized white blooms at the height of summer.
This Proven Winners® selection produces flower spikes nearly twice the size of traditional clethra varieties, creating a bold display when many other shrubs have finished blooming. Glossy dark green foliage forms a dense, compact mound that fits comfortably into foundation plantings and mixed borders.
In fall, foliage transitions to bright yellow, extending seasonal interest. Native to North America, this adaptable shrub performs well in consistently moist soils and is particularly well suited for rain gardens and woodland edges.
Butterflies and other pollinators are frequent visitors during bloom season, adding movement and life to the summer landscape.
Care
Vanilla Spice® Summersweet Care
Plant in full sun to partial shade. In hotter climates, light afternoon shade may help maintain foliage quality.
This shrub prefers consistently moist, well-drained soil and tolerates heavier soils better than many flowering shrubs. Avoid prolonged dry conditions once established.
Water regularly during establishment. Mature plants benefit from steady moisture, particularly during extended dry periods.
Apply a spring layer of mulch to help retain soil moisture and moderate soil temperature.
A spring application of slow release fertilizer may support healthy growth, especially in nutrient-poor soils.
Prune in late spring after new growth begins if shaping is desired. Avoid cutting into thick, mature stems.
Container Growing: Use a large container with consistent moisture and good drainage. Container-grown plants require more frequent watering than in-ground plantings. Plants hardy in the ground may require winter protection when grown in containers in colder zones.
Size
What Size is the Vanilla Spice® Summersweet for Sale Online?
Plants ship in a greenhouse-grade grow pot and are well rooted and actively growing. Each plant is established but not mature at time of shipment. Please contact us with any specific size questions before ordering.
How Large Does Vanilla Spice® Summersweet Grow?
At maturity, this shrub typically reaches 3 to 6 feet tall and wide, forming a dense, rounded mound.
Additional Information
What is the botanical name of Vanilla Spice® Summersweet?
The botanical name is Clethra alnifolia ‘Caleb’.
Is this shrub suitable for wet areas?
Yes. Summersweet tolerates consistently moist soil and performs well in rain gardens and low areas with good drainage. Browse additional shrubs suited for landscape planting.
Is Vanilla Spice® deer resistant?
Clethra varieties are often considered deer resistant once established. Explore similar deer-resistant shrubs and evergreens for comparable options.
Are more Proven Winners® shrubs available?
Yes. You can explore additional selections in our Proven Winners® collection.
