Illustration
Foamy Bells
Heucherella
Foamy Bells blooms from May through June.
Months here are Northern Hemisphere months; in the Southern Hemisphere, shift them by six months.
Growing Foamy Bells
Plant it in part shade. It prefers moderate water. It is hardy in USDA zones 4–9. Expect it to reach about 12 in tall and 16 in wide at maturity, in roughly 2 years (a house reading).
Pets
- No toxic listing found for dogs and cats in the sources we check.
Lists differ and none is complete. If a pet eats a plant and seems unwell, call a veterinarian or a pet poison helpline.
No toxicity note is on file for Foamy Bells. That is not a clearance: check its safety for people and pets before planting.
What was checked
Nine facts were checked against named botanical sources, each recorded beside the sources that carried it: mature height and spread, hardiness zones, sun, water, bloom months and color, the trait tags, and years to mature size, which rests on a recorded house rule where no publisher states one and is marked so. Soil, diseases, pests, toxicity and the plant's own names have not yet been read for this plant, and its trait tags are the ones a feature uses rather than every word a page prints. Each fact above carries its own mark. The planting, spacing and size sections are derived from these checked facts by a fixed rule, not checked separately, and the plant type is the library's own classification.
When to plant Foamy Bells
Plant Foamy Bells in early spring as soon as the soil is workable, or in early fall at least six weeks before your first frost, so roots establish in cool weather. In zone 6, the middle of its hardy zones 4 to 9, spring means March to May and fall means August or September. Once settled, it blooms from May to June.
Month-by-month timing for your zone is on the planting calendar; if you garden near zone 6, the middle of this plant's hardy range, start with zone 6 in March. Derived from the plant's category, zones and bloom months plus typical zone frost dates, not checked separately.
How big does Foamy Bells get?
12 intall5 ft 7 inan adult16 inwideSee Foamy Bells in a garden plan: the planner shows it in 3D beside everything else you add, growing toward this size over the years.
How far apart to plant Foamy Bells
Derived from the mature spread above by a fixed rule, not checked separately: spacing is the spread, center to center.
Space Foamy Bells about 16 in apart, center to center, so each plant has room to reach its full width.
Add Foamy Bells to a garden plan and the planner draws it at its full width, so you see the spacing before you buy.
Where these facts come from
Foamy Bells' height, spread, hardiness zones, sun, water, bloom color and trait tags were checked against 9 published sources on October 22, 2026. Each one is linked below with every fact it carried, which can include a fact this page still marks as not yet checked, because a source carrying a value is not the same as the value being held to the standard. Facts not in that list, and the planting, spacing and size sections, are not covered by these sources.
- NC State Extensionheight, spread, hardiness zones, sun, water, bloom months and color and trait tags
- greenhousegrower.comGreenhouse Grower, Conor Carey and Dan Heims of Terra Nova Nurseriesheight, spread, sun, water, bloom months and color and trait tags
- gardencrossings.comGarden Crossingshardiness zones, sun, water, bloom months and color and trait tags
- costafarms.comCosta Farmsheight, hardiness zones, sun and water
- Missouri Botanical Gardenheight, sun and bloom months and color
- Plant Delights Nurserywater and trait tags
- RHSRoyal Horticultural Societybloom months and color
- Chicago Botanic Gardensun
- oglesbytc.comOglesby Plants Internationalhardiness zones
How the checking works, and what each standard covers, is on the verified plants page.
Good to know about Foamy Bells
Curated from university extensions, botanic gardens and other primary sources, with the source named on every note. A note reports what its source says; where that differs from a fact above, the fact above is this entry's stored value, and its mark says whether it has been checked.
Worth knowing
A cross between coral bells (Heuchera), grown for colorful leaves, and foamflower (Tiarella), grown for airy flowers. It marries one's foliage to the other's flowering. per NC State
How much sun
Most need afternoon shade in heat to protect foliage. In cooler climates, and with dark-leaved or Heuchera villosa cultivars, they take more sun. Morning sun, afternoon shade suits nearly all. per NC State and Arkansas
Evergreen or semi-evergreen
Leaf retention depends on climate. In mild-winter regions it is evergreen; in cold-winter regions it is semi-evergreen to deciduous. Either way the crown persists rather than dying to the ground. per NC State and Arkansas
Overwatering is the top killer
The leading way to lose it is root and crown rot from overwatering and poor drainage; winter wet in heavy soil is worst. Set the crown high, drain sharply. per NC State and UT Gardens
Shallow crown heaves in winter
Its shallow crown can heave up in winter freeze-thaw. After the ground freezes, mulch with straw or evergreen boughs, and firm or replant any lifted crowns in early spring. per Wisconsin and NC State
Deer resistant
Rated deer resistant. Like coral bells, tannins in the leaves make them unappetizing to deer and rabbits, so browsing pressure is low, though very hungry wildlife may still sample it. per NC State
Sterile: increase by division
The hybrids are mostly sterile, so they set no viable seed and do not self-sow. That keeps them tidy, but named cultivars must be increased by division, not seed. per NC State and Arkansas
What pairs well with Foamy Bells
Good companions share its growing conditions and add something it lacks: an earlier or later bloom, a lower carpet in front, or structure through winter.
Camellia
Shares part shade and moderate water; blooms in midwinter, before this one opens; both offer pollinator forage, in different months; evergreen, so the bed keeps its shape through winter.
Hellebore
Shares part shade and moderate water; blooms in late winter, before this one opens; evergreen, so the bed keeps its shape through winter; both offer pollinator forage, in different months.
Northern Sea Oats
Shares part shade and moderate water; blooms in midsummer as this one finishes; its seed heads stand through winter, for structure and the birds; taller at 3.5 ft, for the layer behind it.
Azalea
Shares part shade and moderate water; opens in mid spring and overlaps into this one's season; evergreen, so the bed keeps its shape through winter; both offer pollinator forage.
Cardinal Flower
Takes part sun to part shade and moderate to high water; blooms in midsummer as this one finishes; both offer pollinator forage, in different months; taller at 3.5 ft, for the layer behind it.
Summersweet
Shares part shade and moderate to high water; blooms in midsummer as this one finishes; both offer pollinator forage, in different months; taller at 6 ft, for the layer behind it.
Ligularia
Shares part shade and moderate to high water; blooms in midsummer as this one finishes; both offer pollinator forage, in different months; taller at 4 ft, for the layer behind it.
Windflower
Takes part sun to part shade and moderate water; blooms in early spring, before this one opens; both offer pollinator forage, in different months; lower at 6 in, for the front of the border.
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