Plant Profile: Summersweet Clethra
If you’re looking to add some fragrance to your garden, look no further than Clethra. This summer-blooming shrub is covered with spicy-sweet aromatic blooms and is aptly known as Summersweet.
Imagine lounging in your backyard, feet up, a good book that is all but forgotten as you close your eyes to relish the mild, warm breeze that blows your hair gently across your face. Imagine floating on this breeze is the sweet aroma of a plant that you can’t quite place. A perfume that takes you on a journey you’ve never been but have secretly longed for.
This plant is Clethra. Commonly known as Summersweet and Sweet Pepperbush. And yes, the spiciness that this plant lends offers a warmth that even the most fragrant roses can never achieve. Clethra, by far, is the one plant you need to add to your landscape in your pursuit to create a fragrant garden.
About Clethra alnifolia
Clethra alnifolia are deciduous shrubs that flower mid to late summer. Fragrant flowers in white and pink spike above dark, glossy green foliage. The flowers of Clethra attract many pollinators, including butterflies, bees, and hummingbirds. While Clethra is not deer-proof, they are seldom severely damaged by deer.
Clethra alnifolia is native to the East Coast and can be found as far inland as Texas. They like consistently moist soil and are often found in swampy woodlands or on stream banks, making them suitable for rain gardens. Clethra are suckering plants that are densely branched and work well for stabilizing hillsides. Removal of the plant suckers is needed unless a naturalized look is sought-after.
These delightfully sweet-smelling shrubs are an excellent addition to any landscape or garden. Here are two of our favorite Summersweet to grow!
‘Ruby Spice’ Summersweet
Ruby Spice is covered with rosy-pink spikes that can reach 6″ long from July into August. It is a medium-sized shrub that would work well in perennial borders or as screening. This aromatic beauty, with its rose-colored blooms, would be most fitting in an English or Cottage-style garden.
Clethra alnifolia ‘Ruby Spice’
| Zone: | 3 – 9 |
| Height: | 6-feet |
| Spread: | 5-feet |
| Bloom Time: | Summer |
| Bloom Description: | Rose-pink flower spikes |
| Light Requirements: | Partial Sun to Partial Shade |
| Water: | Maintain evenly moist soil |
| Maintenance: | Avoid hot, dry sites, water deeply, fertilize before new growth appears in spring, prune in late winter |
| Features: | Ruby Spice has fragrant flower spikes in summer above glossy green foliage. They attract butterflies, bees, and hummingbirds, |
‘Sixteen Candles’ Summersweet
Sixteen Candles Clethra has fragrant white flower spikes in summer that simply entice butterflies. It is a wonderfully compact shrub that reaches only 3 to 4-feet in size. This makes it not only suitable for cottage-style and perennial gardens but ideal for foundation plantings. While Clethra is often not known for showy fall color, Sixteen Candles does boast an attractive golden-yellow to end the season.
Clethra alnifolia ‘Sixteen Candles’
| Zone: | 3 – 9 |
| Height: | 3-feet |
| Spread: | 3-feet |
| Bloom Time: | Summer |
| Bloom Description: | White flower spikes |
| Light Requirements: | Partial to Full Sun |
| Water: | Maintain evenly moist soil |
| Maintenance: | Avoid hot, dry sites, water deeply, fertilize before new growth appears in spring, prune in late winter |
| Features: | Sixteen Candles has fragrant flower spikes in summer above glossy green foliage. They attract butterflies, bees, and hummingbirds. |
