Sixteen Candles Summersweet
Clethra alnifolia 'Sixteen Candles'
Planting & Care
Planting & Care
Delivery and Shipping
Delivery and Shipping
Preorder Shipping Schedule
We ship your plants when it's safe to transport them to your zone. Dates are estimated and subject to weather delays.
| Zone 3-4 | Week of March 30th |
| Zone 5 | Week of March 16th |
| Zone 6-12 | Week of March 2nd |
Shipping Rates
Ships in 7-10 business days • Tracking provided • Weather protected
| Under $50 | $9.99 |
| $50 - $99.99 | $14.99 |
| $100 - $149.99 | $16.99 |
| $150 - $198.99 | $24.99 |
| $199+ | FREE |
✓ Zone-specific timing • ✓ Professional packaging • ✓ Health guarantee
Understanding Our Container Sizes
At Nature Hills, our plants are sold in industry-standard nursery containers. You will notice we use the word "container" rather than "gallon." Container numbers follow a nursery trade size standard, not liquid volume. The number tells you the plant's size category and general maturity level. A larger container means a more established plant with a stronger root system.

Container Sizes
Quart
Plant age: 6 months to 1 year
Best for: Ground covers, perennials, ornamental grasses
What to expect: Our smallest and most affordable size. Well-suited for planting in multiples across a large area. Allow 1 to 2 seasons for full establishment.
#1 Container
Plant age: 1 to 2 years
Best for: Shrubs, perennials, smaller trees
What to expect: About the size of a large coffee can. A well-developed root system in a manageable size. Good value choice when you have time to let the plant grow into the space over a season or two.
#2 Container
Plant age: 2 to 3 years
Best for: Shrubs and trees where you want faster establishment
What to expect: A noticeable step up from a #1 in both plant size and root development. Good choice when you want visible presence without going to a larger size.
#3 Container
Plant age: 3 to 4 years
Best for: Most plants, most situations — flowering trees, shade trees, evergreen shrubs
What to expect: Our most popular size. Strong, developed root system. Plants in a #3 container make an immediate visual impact from day one. If you want a head start rather than waiting seasons for a plant to fill in, this is typically the right choice.
#5 Container and Larger
Plant age: 4 to 5+ years
Best for: Specimen plants, privacy screens, maximum instant impact
What to expect: Large, mature plants ready to make an immediate statement in your landscape. We also carry #7 and larger sizes for select varieties.
Why "Container" and Not "Gallon"?
Nursery container sizes follow an industry trade standard established for the nursery and horticulture industry. The number is a size designation, not a measurement of liquid volume. Actual soil volume varies by plant type, root mass, and growing medium. Using "container" is the accurate industry term. When you see #1, #2, or #3, think of it as the plant's size tier, not a gallon measurement.
Root Pouch Containers
Some Nature Hills plants arrive in a Root Pouch, a breathable fabric container made from 100% recycled materials. Root Pouches encourage denser root development through air pruning, which discourages root circling and promotes a stronger, more fibrous root ball at the time of planting.

There are two types. Knowing which one you have changes how you plant:
- Degradable (brown or tan fabric): Plant the entire pouch directly in the ground. The fabric breaks down naturally in the soil over time.
- Non-degradable (black or gray fabric): Remove the pouch before planting. Cut the bottom open with scissors, then peel the sides away. The fibrous root ball will hold its shape.
Not sure which type you have? Check the tag on your plant or contact us and we will confirm.
Full Root Pouch planting guide
Choosing the Right Size
| Size | Plant Age | Best For |
|---|---|---|
| Quart | 6 mo to 1 yr | Ground covers, perennials, grasses. Budget-friendly for mass plantings. |
| #1 Container | 1 to 2 yrs | Shrubs, perennials, small trees. Value choice for patient gardeners. |
| #2 Container | 2 to 3 yrs | Shrubs and trees where you want faster establishment. |
| #3 Container | 3 to 4 yrs | Most plants. Immediate visual impact. Our most popular size. |
| #5 and larger | 4+ yrs | Specimen plants, privacy screens, maximum instant impact. |
Still not sure which size is right for your project? Our plant specialists are happy to help. Contact us and we will point you in the right direction.
Plant Sentry™ Protected
Your order is protected by our compliance system that:
- Prevents restricted plants from shipping to your state
- Ensures plants meet your state's agricultural requirements
- Protects gardens from invasive pests and diseases
Description
Shade-Tolerant Floral Shrub
Sixteen Candles Summersweet is a deciduous shrub with ornamental features. Plant a few of these in a naturalized area, especially near a stream or water garden. Sixteen Candles would also look outstanding in that shady spot in your yard where you'd like a splash of color.
Your Sixteen Candles will amaze you with its 6-inch long spikes of delicate blossoms that reach out amid the dark green foliage in mid-to late summer. The pristine white flowers are variable in orientation, with some gently arching, upright or horizontal.
The effect of the tall, straight spikes of blooms creates an appearance reminiscent of "candles" (thus the name). Each floral spike exudes a delightful fragrance, a popular draw for your yard's pollinator. Sixteen Candles' 4-inch leaves are toothed and oblong with an ornamental, glossy sheen. Transitioning to yellow and brown hues for fall, the foliage adds one last gasp of color for your yard.
Sixteen Candles Summersweet is a relatively low maintenance and hardy shrub with no significant disease or insect issues. Sixteen Candles Summersweet is adaptive to a variety of conditions and quite shade tolerant. In fact, it tends to prefer shady, moist conditions.
Sixteen Candles Summersweet is a lovely shrub with a lot to offer. Especially if you have a shady or moist spot in your yard, this shrub is a perfect choice to spice things up. Try one today!
- Fragrant Summer Flowers
- Fall Interest
- Adaptive To A Variety Of Conditions
- Shade Tolerant
Specifications
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Botanical Name
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Class
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Species
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Cultivar
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Growing Zones
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Height
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Width
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Sunlight
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Growth RateSlow
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Flower Color
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Leaf Color
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Fall Color
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NativeYes
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FragrantYes
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Bloom PeriodLate Summer
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Does Not Ship ToAK, HI, ID, MT, PR
Characteristics






