Hummingbird Summersweet
Hummingbird Summersweet
Fragrant Late-Summer Blooms for Shady, Wet Spots
Hummingbird Summersweet (Clethra alnifolia 'Hummingbird') is the compact, honey-scented shrub that finally solves the tricky corner of the yard most plants hate: damp, shady, and overlooked. When midsummer heat has most flowering shrubs finished for the year, Hummingbird erupts in dense, bottlebrush spikes of pure white that perfume the whole garden and pull in butterflies, bees, and hummingbirds. It's a dependable, native-derived performer for Edina, Maple Grove, and Woodbury landscapes that want fragrance and pollinator action without fussy care.
| Attribute | Detail |
|---|---|
| Botanical Name | Clethra alnifolia 'Hummingbird' |
| Mature Size | 2–3 ft tall and wide |
| Hardiness Zone | Zone 3–9 (fully hardy across Minnesota) |
| Light | Full sun to part shade; tolerates shade |
| Bloom Time | Mid to late summer (July–August) |
| Flower Color | Fragrant white spikes |
| Soil | Moist to wet; tolerates clay and poor drainage |
Landscape Uses
Hummingbird shines in rain gardens, along downspouts and pond edges, and in shaded foundation beds where its compact mound stays tidy. Mass it for a fragrant low hedge, tuck it under high-canopy trees, or pair it with ferns and hostas for a cool, woodland feel. Fall brings clear golden-yellow foliage for a late-season bonus.
Best Time to Plant
Plant in spring through early fall. Minnesota's cool, moist spring gives roots a strong start, while a planting at least six weeks before the first hard frost lets it settle in for winter.
How to Plant
Dig a hole twice as wide as the root ball and just as deep. Loosen the roots, set the crown level with the soil surface, backfill, and water thoroughly. Mulch 2–3 inches deep, keeping it off the stems, to lock in the moisture this shrub loves.
Watering
First Year: Water deeply 2–3 times per week. Summersweet genuinely prefers consistently moist soil, so don't let it dry out.
After Year One: Water weekly, more in heat. It tolerates wet feet far better than drought.
Drip Irrigation: A drip line or soaker hose is ideal for keeping the root zone evenly moist through summer.
Frequently Asked Questions
Is Hummingbird Summersweet hardy in Minnesota?
Yes. It's rated to Zone 3 and is one of the most reliably hardy fragrant shrubs you can plant here.
Will it grow in shade?
It does. Full sun gives the heaviest bloom, but it flowers well in part shade and tolerates fairly dense shade better than most flowering shrubs.
Is it deer resistant?
Yes, deer generally leave Summersweet alone.
Does it really attract pollinators?
Very much so. The fragrant blooms are a magnet for butterflies, native bees, and hummingbirds in late summer.
You May Also Like
Pair Hummingbird Summersweet with our other shade- and moisture-loving shrubs for a layered rain garden, or browse our full Summersweet collection for pink and full-size varieties.
How Many Hummingbird Summersweet Do I Need?
For a fragrant low hedge or rain-garden mass, space Hummingbird about 2.5 feet apart (it matures 2–3 feet wide):
| Run Length | Plants Needed |
|---|---|
| 5 feet | 3 |
| 10 feet | 5 |
| 20 feet | 9 |
| 30 feet | 13 |
In rain gardens and under high-canopy trees, plant drifts of 3–5 at the same spacing — massed plants amplify the late-summer perfume. A single shrub works in a small damp foundation pocket with a 3-foot circle.
Hummingbird Summersweet Season-by-Season in Minnesota
- Spring: One of the later shrubs to leaf out — don't panic in May; glossy deep-green foliage fills in by early June.
- Summer: The main event — dense white bottlebrush spikes in July–August, honey-scented and swarming with butterflies, native bees, and hummingbirds when little else is blooming.
- Fall: Foliage turns a clear golden-yellow, glowing in shady corners; seed capsules form along the spent spikes.
- Winter: Tidy twiggy mound with persistent seed-capsule spikes that catch snow; fully hardy to zone 3 with no protection needed.
At a Glance
✔ Pollinator-Friendly ✔ Deer-Resistant ✔ Rain-Garden / Wet-Soil ✔ Shade-Tolerant
Plant It With
- Ruby Spice Summersweet — the deep-pink full-size summersweet the body points to; layer it behind Hummingbird for a two-tone fragrant drift.
- Vanilla Spice Summersweet — extra-large white flower spikes on a taller frame for the back of the same damp bed.
- Fiber Optics Buttonbush — native wet-soil pollinator shrub whose globe blooms overlap Hummingbird's spikes in midsummer.
- Ground Hug Aronia — a native groundcover layer for the rain-garden floor in front, with glossy foliage and red fall color.
Is Hummingbird Summersweet Right for Your Yard?
Hummingbird thrives where most flowering shrubs fail — damp clay, downspout zones, pond edges, and part to fairly dense shade — and deer leave it alone while pollinators flock to it. It's not a fit for hot, dry, sandy spots: it tolerates wet feet far better than drought, and it will sulk without consistent moisture.