Zone 3 • -40º to -30ºF
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| Family name | Latin name | English name | ||
| Hardy ferns | ||||
| Adiantaceae | Adiantum | pedatum | Northern Maidenhair |  |
| Adiantaceae | Adiantum | pedatum "Imbricatum" | Maidenhair fern |  |
| Adiantaceae | Adiantum | pedatum "Japonicum" | Rosy Maidenhair fern |  |
| Adiantaceae | Adiantum | pedatum "Miss Sharpless" | Maidenhair fern |  |
| Adiantaceae | Adiantum | pedatum "Aleuticum" | Northern Maidenhair |  |
| Aspidiaceae | Dryopteris | carthusiana | Narrow Buckler fern |  |
| Aspidiaceae | Dryopteris | marginalis | Eastern Wood fern |  |
| Aspidiaceae | Dryopteris | clintoniana | Clinton's Shield fern |  |
| Aspidiaceae | Dryopteris | cristata | Crested Shield fern |  |
| Aspidiaceae | Dryopteris | goldiana | Goldie's fern |  |
| Aspidiaceae | Polystichum | acrostichoides | Christmas fern |  |
| Aspidiaceae | Polystichum | braunii | Braun's Holly fern |  |
| Aspleniaceae | Asplenium | trichomanes | Maidenhair spleenwort |  |
| Aspleniaceae | Asplenium | trichomanes "Cristatum" | Maidenhair spleenwort |  |
| Aspleniaceae | Ceterach | officinarum | Rusty Back fern |  |
| Athyriaceae | Currania | dryopteris Plumosum | Plumose Oak fern |  |
| Athyriaceae | Cystopteris | fragilis | Brittle Bladder fern |  |
| Athyriaceae | Matteuccia | struthiopteris | Ostrich fern |  |
| Athyriaceae | Onoclea | sensibilis | Sensitive fern |  |
| Osmundaceae | Osmunda | cinnamomea | Cinnamon fern |  |
| Osmundaceae | Osmunda | claytoniana | Interrupted fern |  |
| Osmundaceae | Osmunda | regalis | European Royal fern |  |
| Osmundaceae | Osmunda | regalis "Purpurescens" | Purple Royal fern |  |
| Osmundaceae | Osmunda | regalis "Cristata" | Crested Royal fern |  |
| Thelypteridaceae | Thelypteris | palustris | Marsh fern |  |
| Woodsiaceae | Woodsia | ilvensis | Rusty Woodsia |  |
| Woodsiaceae | Woodsia | obtusa | Blunt-lobed Woodsia |  |