Hardiness zone 3a
Plants for zone 3a.
56 plants in this guide grow in USDA hardiness zone 3a, where the coldest winter nights reach about -40 °F (-40 °C). Each one survives a zone 3a winter outdoors.
Annual
Bulb
Climber
Fern
Groundcover
Ornamental grass
Perennial
- Autumn Joy stonecropHylotelephium spectabile, zones 3a–9b
- Bearded irisIris germanica, zones 3a–9b
- Black-eyed SusanRudbeckia fulgida, zones 3a–9b
- Blanket flowerGaillardia × grandiflora, zones 3a–10b
- Blazing starLiatris spicata, zones 3a–9b
- Bleeding heartLamprocapnos spectabilis, zones 3a–9b
- BrunneraBrunnera macrophylla, zones 3a–8b
- Butterfly weedAsclepias tuberosa, zones 3a–9b
- CatmintNepeta × faassenii, zones 3a–8b
- ChivesAllium schoenoprasum, zones 3a–9b
- ColumbineAquilegia canadensis, zones 3a–8b
- DaylilyHemerocallis fulva, zones 3a–9b
- DelphiniumDelphinium elatum, zones 3a–7b
- Foxglove beardtonguePenstemon digitalis, zones 3a–8b
- Hardy geraniumGeranium sanguineum, zones 3a–8b
- HelleboreHelleborus niger, zones 3a–8b
- HollyhockAlcea rosea, zones 3a–9b
- HostaHosta plantaginea, zones 3a–9b
- Lady's mantleAlchemilla mollis, zones 3a–8b
- LungwortPulmonaria officinalis, zones 3a–8b
- New England asterSymphyotrichum novae-angliae, zones 3a–8b
- PeonyPaeonia lactiflora, zones 3a–8b
- Purple coneflowerEchinacea purpurea, zones 3a–8b
- Siberian irisIris sibirica, zones 3a–8b
- Solomon's sealPolygonatum biflorum, zones 3a–9b
- Swamp milkweedAsclepias incarnata, zones 3a–9b
- Threadleaf coreopsisCoreopsis verticillata, zones 3a–9b
- YarrowAchillea millefolium, zones 3a–9b