Godzilla Fern
Godzilla Fern
A Giant Painted Fern That Commands the Shade Garden
Godzilla Fern (Athyrium 'Godzilla') is the supersized painted fern — a vigorous hybrid that erupts into a massive clump up to 3 feet tall and 4 to 5 feet wide, draped in silvery-green fronds washed with burgundy and pewter. It delivers the colorful shimmer of a Japanese painted fern at three times the size, making a true focal point in a shaded bed. Bold and deer-resistant, it anchors woodland gardens in Edina, Minnetonka, and Eden Prairie.
Godzilla Fern Plant Details
| Attribute | Detail |
|---|---|
| Botanical Name | Athyrium 'Godzilla' |
| Mature Size | 24–36 in. tall, 36–60 in. wide |
| Hardiness Zone | 4–8 (Twin Cities is zone 4b–5a — fully hardy) |
| Light | Part shade to full shade |
| Soil | Moist, rich soil; tolerates clay with added compost |
| Winter Hardiness | Reliable to about -25°F; dies back and returns each spring |
| Deer Resistance | Rarely browsed by deer or rabbits |
| Foliage | Deciduous; large silvery-green fronds with burgundy tones |
Landscape Uses in Minnesota
Shade focal point: Its sheer size makes it a living sculpture in a shaded bed — give it room to show off. Space 3–4 feet apart.
Woodland backdrops: Use it as the anchor behind hostas and smaller ferns. Pair with Ghost fern, hostas, and astilbe.
Best Time to Plant in Minnesota
Plant in spring (late April–May) or early fall (late August–mid September) into moist, shaded soil. Keep moist through establishment.
How to Plant Godzilla Fern
Dig a hole twice the root ball width at the same depth, mixing in compost. Set the crown level, backfill, water well, and mulch with shredded leaves. Give it space — 3 to 4 feet — to reach full size.
Watering Godzilla Fern
First year: Keep the soil evenly moist — water every 1–2 days in dry weather.
After year one: Maintain steady moisture for the biggest, most colorful fronds. Mulch helps retain it.
Q: How big does it really get?
Mature clumps can reach 3 feet tall and 4 to 5 feet across — by far the largest of the painted-fern types. Plan for the space.
Q: Does it have the painted-fern color?
Yes — silvery-green fronds with burgundy and pewter highlights, just on a much larger scale.
Q: Is it deer-resistant?
Yes — deer and rabbits rarely browse ferns.
Q: Will it survive a Minnesota winter?
Yes — hardy to zone 4, returning each spring.
You May Also Like
Ghost Fern (Athyrium): A tall, silvery-white painted fern to layer with Godzilla.
Japanese Painted Fern (Athyrium niponicum): The compact original for the front of the bed.
Hosta: Bold companion foliage for a layered shade garden.
How Many Godzilla Ferns Do I Need?
Godzilla is the giant of painted ferns — a mature clump reaches 3 ft tall and 4–5 ft wide. Give each plant room: space them 3–4 feet apart. In most beds one or three plants are plenty, used as living sculpture or a backdrop. For a sweeping shade mass, plan on roughly one fern per 12–16 sq ft so the clumps can spread without crowding.
Godzilla Fern Season-by-Season in Minnesota
- Spring: Big fiddleheads unfurl into broad silvery-green fronds washed with burgundy and pewter.
- Summer: The clump swells to its full, dramatic size and holds rich color all season in shade.
- Fall: Fronds persist late, then yellow and die back with hard frost.
- Winter: Dormant below ground; mulch the crown and it returns larger each spring.
At a Glance
✔ Deer-Resistant ✔ Shade-Tolerant
Plant It With
- Ghost Fern — a tall, silvery-white painted fern to layer alongside
- Japanese Painted Fern — the compact original for the front of the bed
- Alexandria Brunnera — silver-veined heart-shaped leaves for a shade-foliage tapestry
- Black Pearls Astilbe — dark foliage and plumes that contrast the silvery fronds
Is Godzilla Fern Right for Your Yard?
Godzilla Fern wants part to full shade with moist, compost-rich soil and plenty of elbow room — it's a focal point for larger woodland beds. Not a fit for small spaces, sunny exposures, or dry soil; in hot sun or drought the giant fronds scorch and the clump stays stunted.