Illustration
Northern Exposure Silver
Heuchera 'TNHEUNES'
Also called northern exposure silver coral bells and heuchera northern exposure silver
Northern Exposure Silver blooms from May through August.
Months here are Northern Hemisphere months; in the Southern Hemisphere, shift them by six months.
Growing Northern Exposure Silver
Plant it in part shade. It prefers moderate water. It is hardy in USDA zones 4–9. Expect it to reach about 24 in tall and 20 in wide at maturity, in roughly 2 years (a house reading).
No toxicity note is on file for Northern Exposure Silver. That is not a clearance: check its safety for people and pets before planting.
What was checked
Mature height and spread, hardiness zones, sun, water, bloom months and color and the trait tags were checked against named botanical sources for this plant, with what the sources could not settle written down; years to mature size rests on a recorded house rule where no publisher states one, and is marked so; its common name and alternate names have not been checked yet. 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 Northern Exposure Silver
Plant Northern Exposure Silver 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 August.
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 Northern Exposure Silver get?
24 intall5 ft 7 inan adult20 inwideSee Northern Exposure Silver 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 Northern Exposure Silver
Derived from the mature spread above by a fixed rule, not checked separately: spacing is the spread, center to center.
Space Northern Exposure Silver about 20 in apart, center to center, so each plant has room to reach its full width.
Add Northern Exposure Silver 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
Northern Exposure Silver's height, spread, hardiness zones, sun, water, bloom months and color, trait tags, soil, diseases, pests and toxicity were checked against 10 published sources on September 23, 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.
- Perennials.com (Heritage Perennials)Valleybrook International Venturesheight, spread, hardiness zones, sun, water, bloom months and color, trait tags, soil, diseases and pests
- Plant Addictsheight, spread, hardiness zones, sun, water, bloom months and color, trait tags, soil, diseases and pests
- terranovanurseries.comTerra Nova Nurseries (the breeder)height, spread, hardiness zones, sun, water, bloom months and color, trait tags, soil and diseases
- plants.longfellowsgreenhouses.comLongfellow's Greenhouses (NetPS Plant Finder entry 24106)height, hardiness zones, sun, water, bloom months and color, trait tags and soil
- US plant patent (Google Patents)Google Patents; assignee Terra Nova Nurseriesheight, spread, hardiness zones, sun, bloom months and color, diseases and pests
- NC State ExtensionHeuchera Northern Exposure Group, series pagesun, trait tags, soil, diseases and pests
- agsci.psu.eduPenn State Flower Trials (2019 shade trial)height, spread and bloom months and color
- agsci.psu.eduPenn State Flower Trials (2017 shade trial)height, spread and bloom months and color
- agsci.psu.eduPenn State Flower Trials (2018 shade trial)bloom months and color
- ASPCAAnimal Poison Control Centertoxicity
How the checking works, and what each standard covers, is on the verified plants page.
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Design a garden with this
Drop this plant onto a 3D plan, see how it fills in, and watch your whole garden bloom across the year.