Japanese painted fern is a lot different from the plain green ferns that many gardeners are most familiar with, such as the interrupted fern (Osmunda claytoniana). True to its name, Japanese painted fern is more colorful, offering triangular, silvery leaves
(called "fronds," technically) that sport an arching habit. As if that were not exciting enough, they also have grayish-green in them, as well as purplish midribs, making them variegated
ferns.
Common Name |
Japanese painted fern |
Botanical Name |
Athyrium niponicum |
Family |
Athyrium |
Plant Type |
Perennial |
Mature Size |
About 18 in. tall and wide |
Sun Exposure |
Partial, shade |
Soil Type |
Moist but well-drained |
Soil pH |
Neutral, acidic, alkaline |
Hardiness Zones |
3, 4, 5, 6, 7, 8 |
Native Area |
Asia |
Bloom Time:Foliage plant all season.
How to plant:Light While Japanese painted fern is listed as being a plant for partial shade or full shade, the decision is often made for you based on where you live. At the more southerly end of its range, Japanese painted fern should be grown in full shade. Northerners have more choice in the matter. Still, the fact that the plant achieves its best color in the North if grown in partial shade more or less makes the decision on plant location for you.
Soil An essential requirement in growing Japanese painted fern is soil with excellent drainage. Otherwise, the plant may suffer from root rot and fungal diseases.
Water Keep the soil evenly moist (but not soggy). Otherwise, browning on the fronds will occur during the heat of summer.
Temperature and HumidityThe Japanese painted fern does best in moderate temperatures of 55 to 80 degrees Fahrenheit. It also prefers a moderate humidity level of 40 to 60 percent.
Fertilizer As long as you work organic soil amendments into its soil occasionally (including feedings of manure tea), additional fertilization should not be necessary. But if you prefer commercial fertilizers, apply a balanced fertilizer in spring, carefully following the instructions on the label.