# Carolina Silverbell (Halesia tetraptera)

> Rows of white bell flowers hang beneath the branches in April on this graceful Appalachian understory tree.

Also called mountain silverbell, snowdrop tree, Halesia carolina. Category: Uncommon Yard Trees. Grown from seed by Blue Whale Trees. Web version: https://bluewhaletrees.com/plants/carolina-silverbell/

![Carolina silverbell (Halesia tetraptera) white bell flowers hanging from a branch in spring](https://bluewhaletrees.com/img/plants/carolina-silverbell-h1610-800.jpg)
*Photo: Raul654, CC BY-SA 3.0, cropped · [Wikimedia Commons](https://commons.wikimedia.org/wiki/File:Halesia_tetraptera2.jpg)*

## Facts

- Type: Medium tree
- Mature height: 30 to 40 ft
- USDA hardiness zones: 4 to 8
- Grows wild in: Rich moist slopes, the Appalachians and stream banks
- Native range: 18 states, north to [New York](https://bluewhaletrees.com/tools/native/index.html.md?state=NY) and south and west to [Texas](https://bluewhaletrees.com/tools/native/index.html.md?state=TX) ([Alabama](https://bluewhaletrees.com/tools/native/index.html.md?state=AL), [Arkansas](https://bluewhaletrees.com/tools/native/index.html.md?state=AR), [Georgia](https://bluewhaletrees.com/tools/native/index.html.md?state=GA), [Illinois](https://bluewhaletrees.com/tools/native/index.html.md?state=IL), [Indiana](https://bluewhaletrees.com/tools/native/index.html.md?state=IN), [Kentucky](https://bluewhaletrees.com/tools/native/index.html.md?state=KY), [Missouri](https://bluewhaletrees.com/tools/native/index.html.md?state=MO), [New Jersey](https://bluewhaletrees.com/tools/native/index.html.md?state=NJ), [New York](https://bluewhaletrees.com/tools/native/index.html.md?state=NY), [North Carolina](https://bluewhaletrees.com/tools/native/index.html.md?state=NC), [Ohio](https://bluewhaletrees.com/tools/native/index.html.md?state=OH), [Oklahoma](https://bluewhaletrees.com/tools/native/index.html.md?state=OK), [Pennsylvania](https://bluewhaletrees.com/tools/native/index.html.md?state=PA), [South Carolina](https://bluewhaletrees.com/tools/native/index.html.md?state=SC), [Tennessee](https://bluewhaletrees.com/tools/native/index.html.md?state=TN), [Texas](https://bluewhaletrees.com/tools/native/index.html.md?state=TX), [Virginia](https://bluewhaletrees.com/tools/native/index.html.md?state=VA) and [West Virginia](https://bluewhaletrees.com/tools/native/index.html.md?state=WV)). Also recorded, not native, in [Connecticut](https://bluewhaletrees.com/tools/native/index.html.md?state=CT), [Michigan](https://bluewhaletrees.com/tools/native/index.html.md?state=MI) and [Rhode Island](https://bluewhaletrees.com/tools/native/index.html.md?state=RI)
- Sun: Part, Full
- Soil moisture: Average
- Growth rate: Medium
- Flowers: April to May
- Fruit: Winged fruit, August to September
- First crop: A few years (first flowers; heavy flower crops from 20 to 25)
- Mature spread: 30 ft
- Traits: Showy flowers, Fall color, Rare, Winter interest
- Sold as: Saplings, Seed

Heights and zones are typical ranges for the species in cultivation; local conditions and seed source shift them.

## Availability

Saplings ship [bare-root](https://bluewhaletrees.com/articles/planting-bare-root-trees-on-arrival/index.html.md) or [in a pot](https://bluewhaletrees.com/articles/a-sapling-in-a-pot/index.html.md), [usually 12 to 18 inches tall](https://bluewhaletrees.com/articles/small-sapling-or-big-transplant/index.html.md), in the dormant season, and their [height and age](https://bluewhaletrees.com/articles/reading-a-nursery-listing/index.html.md) are stated with the price, once available. Live plants ship February to May and October to November. Not priced yet: leave an email on the web page for one email when it is priced, with a code for 10% off the plants in that order, not shipping or tax, or write to captain@bluewhaletrees.com.

## Notes

Silverbell is hardy far north of its southern mountain home. It becomes a multi-stemmed small tree with yellow fall color and four-winged fruit. Rarely available because the seed needs two winters to germinate; ours are past that. Nurseries often sell it as Halesia carolina. Some botanists keep that name for a separate coastal species and call this tree Halesia tetraptera, as we do; others count the two as one species. Ideal for a woodland garden, planted above a path so you see the bells from below.

## Size, growth and what to expect

A Carolina silverbell seedling blooms when only a few years old, and the heavy flower crops come every year once the tree is 20 to 25. It grows at a medium pace, roughly a foot and a half a year in its youth on an average site, which is the rate our growth estimator uses for it. In the wild it is a small tree of 20 to 40 feet with a crown 15 to 30 feet across and a trunk 5 to 11 inches through. The white bells are half to three quarters of an inch long, open in late April and May, and draw crowds of bees.

The dry four-winged fruit that follows is 1 to 2 inches long and holds on into winter. The tree lives about 100 years, and the oldest known has been ring-counted to 197. In the southern Appalachians it is called mountain silverbell.

It grows wild in the Piedmont and mountains of the Carolinas, eastern Tennessee, Georgia and Alabama. Scattered stands reach western Virginia, West Virginia and Ohio, and west to Arkansas and Oklahoma.

## How to grow Carolina Silverbell

Carolina silverbell does best in part shade with morning sun, in average, well-drained soil that stays moist and runs acid. Full sun works where summers stay cool. Allow the tree 25 feet of width, and as much from the house. Set trees 25 to 35 feet apart.

Plant in the dormant season. Saplings come bare-root or in pots. Dig a wide, shallow hole, put the root flare at grade, and refill with the soil you dug, not peat or compost. Mulch a broad ring, off the bark, since the roots run near the surface. Sow cleaned seed outdoors in fall and be patient, since it usually needs two winters to sprout.

Water deeply through the first two summers, and more often on sand. Deer browse it, so cage the young tree until the lowest branches are out of reach. Prune, if at all, right after flowering.

Each flower carries both male and female parts, so there are no male and female trees to pair. Silverbell throws several stems from the base; leave them for the layered look or pick one leader early. On limestone or high pH soil the leaves yellow between the veins, and watering will not fix that, so test before you plant. It carries few pests, and the winged fruit hangs into winter.

## Sources

- [USDA Forest Service, Silvics of North America: Carolina silverbell](https://research.fs.usda.gov/silvics/carolina-silverbell)
- [NC State Extension Gardener Plant Toolbox: Halesia carolina](https://plants.ces.ncsu.edu/plants/halesia-tetraptera/)
- [The Morton Arboretum: silverbell](https://mortonarb.org/plant-and-protect/trees-and-plants/silverbell/)
- [USDA NRCS PLANTS Database: Halesia tetraptera, HATE3](https://plants.sc.egov.usda.gov/plant-profile/HATE3)
- [USDA Forest Service, Woody Plant Seed Manual (2008), Halesia chapter](https://rngr.net/publications/wpsm/genera/h/at_download/file)
- [Flora of North America, vol. 8: Halesia carolina](http://www.efloras.org/florataxon.aspx?flora_id=1&taxon_id=220005985)
- [Virginia Tech Dendrology: silverbell, Halesia tetraptera](https://dendro.cnre.vt.edu/dendrology/syllabus/factsheet.cfm?ID=49)
- [Lady Bird Johnson Wildflower Center: Halesia tetraptera](https://www.wildflower.org/plants/result.php?id_plant=HATE3)
- [NatureServe Explorer: Halesia tetraptera](https://explorer.natureserve.org/Taxon/ELEMENT_GLOBAL.2.142052/Halesia_tetraptera)
- [Trees and Shrubs Online, International Dendrology Society: Halesia carolina, Elliott and Christian 2018](https://www.treesandshrubsonline.org/articles/halesia/halesia-carolina/)
- [Eastern Native Tree Society, Maximum Ages for Eastern Trees, the list's thread with Jess Riddle's ring counts of 2008-01-11](https://web.archive.org/web/20220128200143/http://www.nativetreesociety.org/dendro/maximum_ages_for_eastern_trees.htm)

## Read before planting

- [Ten planting mistakes that quietly kill trees](https://bluewhaletrees.com/articles/ten-planting-mistakes/index.html.md)
- [Transplanting young trees: timing, water and protection](https://bluewhaletrees.com/articles/transplanting-young-trees/index.html.md)
- [Protecting young trees from voles, rabbits, deer and squirrels](https://bluewhaletrees.com/articles/protecting-trees-from-animals/index.html.md)
- [Planting acorns, nuts and seed: collecting, storing and the first year](https://bluewhaletrees.com/articles/planting-acorns-nuts-and-seed/index.html.md)
- [Native trees for the Southern Appalachians: the valleys, the slopes and the high ridges](https://bluewhaletrees.com/articles/native-trees-for-the-southern-appalachians/index.html.md)
- [Multistem or single stem? Sometimes the trunk is hiding the answer](https://bluewhaletrees.com/articles/multistem-or-single-stem/index.html.md)

## Related

- Other silverbells (Halesia) we grow: [Two-wing Silverbell](https://bluewhaletrees.com/plants/two-wing-silverbell/index.html.md)
- Plants that share its sun and soil: [Slippery Elm](https://bluewhaletrees.com/plants/slippery-elm/index.html.md), [Sweet Birch (Black Birch)](https://bluewhaletrees.com/plants/sweet-birch/index.html.md), [Florida Maple](https://bluewhaletrees.com/plants/florida-maple/index.html.md) and [Ohio Buckeye](https://bluewhaletrees.com/plants/ohio-buckeye/index.html.md)
- Under its canopy: [Roseshell Azalea](https://bluewhaletrees.com/plants/roseshell-azalea/index.html.md), [Pinxterbloom Azalea](https://bluewhaletrees.com/plants/pinxterbloom-azalea/index.html.md) and [Mountain Doghobble](https://bluewhaletrees.com/plants/mountain-doghobble/index.html.md)
- Same size, similar character: [Bluff Oak](https://bluewhaletrees.com/plants/bluff-oak/index.html.md), [Pond Cypress](https://bluewhaletrees.com/plants/pond-cypress/index.html.md), [Western Soapberry](https://bluewhaletrees.com/plants/western-soapberry/index.html.md) and [Northern Pin Oak](https://bluewhaletrees.com/plants/northern-pin-oak/index.html.md)
- [Planting-site check](https://bluewhaletrees.com/tools/site-check/index.html.md): for a thrive, struggle or fail verdict on Carolina Silverbell, add ?species=carolina-silverbell with zone (2 to 10), sun (full, part, shade) and moisture (dry, average, wet) to that address; for example, the verdict for zone 4, part sun and average soil as Markdown is at https://bluewhaletrees.com/tools/site-check/index.html.md?species=carolina-silverbell&zone=4&sun=part&moisture=average
- [Companion species for Carolina Silverbell](https://bluewhaletrees.com/tools/companions/index.html.md?species=carolina-silverbell): the natives that share its ground and the plants that pair with it in a yard.
- [Transplant planner](https://bluewhaletrees.com/tools/transplant/index.html.md?species=carolina-silverbell): whether Carolina Silverbell can be moved and what the move takes, the root ball, its weight, who can move it and the months, as Markdown at that address (add caliper= or height=, month= 1 to 12 and soil= sandy, loam or clay)
- [Tree growth estimator](https://bluewhaletrees.com/tools/growth/index.html.md): how the height and trunk projections are made; the estimate for Carolina Silverbell as Markdown is at https://bluewhaletrees.com/tools/growth/index.html.md?species=carolina-silverbell (add height=, years= and site= poor, average or good)
- [Seed sowing planner](https://bluewhaletrees.com/tools/sowing/index.html.md): how Carolina Silverbell is sown, in the chart for every species (treatment, cold days, depth, timing); the dated plan for it as Markdown is at https://bluewhaletrees.com/tools/sowing/index.html.md?species=carolina-silverbell (add state= and zone= for your own frost dates, method=fridge for the refrigerator route)
- [Pollination planner](https://bluewhaletrees.com/tools/pollination/index.html.md): what Carolina Silverbell needs for a crop and how many to plant, in the table for every species; the verdict for 1 of them as Markdown is at https://bluewhaletrees.com/tools/pollination/index.html.md?plants=carolina-silverbell:1
- [Planting-window tool](https://bluewhaletrees.com/tools/planting-window/index.html.md): when to plant Carolina Silverbell where you live, as a fall and a spring window from the local frost dates; the windows as Markdown are at https://bluewhaletrees.com/tools/planting-window/index.html.md?species=carolina-silverbell&state=MO&zone=6 with your own state and zone in place of those
- [Planting-distance tool](https://bluewhaletrees.com/tools/distance/index.html.md): how far Carolina Silverbell goes from a house, a septic field, a walk, wires, a property line and the next tree; the distances as Markdown are at https://bluewhaletrees.com/tools/distance/index.html.md?species=carolina-silverbell&near=house,septic,pavement,wires,boundary,tree
- [Bloom and fruit calendar](https://bluewhaletrees.com/tools/calendar/index.html.md): the months Carolina Silverbell flowers and fruits, in the grid for every species; its own row and the gaps of a planting with it as Markdown at https://bluewhaletrees.com/tools/calendar/index.html.md?plants=carolina-silverbell