Brilliance Autumn Fern
Dryopteris erythrosora 'Brilliance'
Brilliance Autumn Fern, shade garden evergreen, ready to plant
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- Evergreen to semi-evergreen fronds stay ornamental year-round; bronze tones in cold weather add visual interest without leaf drop
- Thrives in full shade where many plants struggle; no direct sun required, making it ideal for dense woodland plantings
- Slow-growing, deer-resistant, and container-friendly; reaches mature clump size (18-24 in) in about 2-3 years with consistent moisture
About this plant
This is an evergreen to semi-evergreen fern with ornamental fronds that develop bronze tones in colder months. It thrives in part shade to full shade and creates a slowly spreading clump of 18-24 inches. Ideal for woodland gardens, shaded borders, mass plantings, and containers, it's also deer and rabbit resistant.
Your fern arrives in a nursery container sized to its growth stage. Upon arrival, place it in a shaded location and water thoroughly. Keep the soil consistently moist for the first growing season; this fern is not drought tolerant when young. Planting depth should match the container soil line. Growth slows in winter but resumes as days lengthen.
Brilliance Autumn Fern at a glance
| Botanical name | Dryopteris erythrosora 'Brilliance' |
|---|---|
| Plant type | evergreen to semi-evergreen herbaceous perennial fern (evergreen in milder zones, semi-evergreen toward zone 5) |
| USDA zones | 5-9 |
| Mature height | 18-24 in (some growers cite up to 2 ft in ideal shade conditions) |
| Mature width | 18-24 in, forming a slowly spreading clump |
| Sun | part shade to full shade; tolerates more morning sun in cooler/northern climates if soil moisture stays consistent |
| Water | medium, consistent moisture; not drought tolerant, especially in first year |
| Bloom time | N/A — ferns do not flower, they reproduce by spores |
| Bloom color | N/A |
| Growth rate | slow to moderate; reaches mature clump size in about 2-3 years, roughly a few inches of new frond growth per year |
| Deer resistance | high — generally deer and rabbit resistant |
| Best planting time | spring or fall |
Container sizes explained
| #1 / 1 Gallon | A trade one gallon pot (about 6.5 inches). One to two seasons older than a quart, with an established root system. |
|---|---|
| #2 / 2 Gallon | A trade two gallon pot. Common for peonies and perennials that need root room; usually blooms the first or second year. |
| #3 / 3 Gallon | A trade three gallon pot (about 10 inches). A well-developed shrub or small tree, often 2 to 4 feet tall on arrival. |
| Sprinter pot / 8 inch pot | Deep, narrow pots used for grafted maples and long-rooted stock. Height is a better guide than volume for these. |
Questions before you buy
Which size should I choose?
The 4 Inch is ideal for gardeners willing to wait for clump development; it's economical if you're planning a shaded border of multiple ferns. The 1 Gallon or larger offer more immediate visual impact and reach mature size faster. For containers or solo plantings, 3 Gallon is a strong middle ground.
When should I plant after it arrives?
Plant within a few days of arrival, placing it in a shaded spot and watering thoroughly. This fern prefers cool, moist soil, so early spring or fall planting works well; however, it can be planted year-round in zones with consistent moisture and shade available.
How big does Brilliance Autumn Fern grow?
It reaches a mature clump size of 18-24 inches in both height and width. Growth is slow to moderate, typically reaching full size in about 2-3 years. It spreads gradually, forming a dense clump rather than a running groundcover.
How much sun does it need?
It prefers part shade to full shade. In cooler or northern climates, it tolerates more morning sun if soil moisture stays consistent. Afternoon shade is beneficial everywhere, and it thrives in full shade under mature trees or on north-facing foundations.
What hardiness zones is this fern suitable for?
Brilliance Autumn Fern is hardy in USDA zones 5-9. In zone 5 (the coldest range), it may be semi-evergreen, losing fronds in the harshest winters. In warmer zones, it remains evergreen.
What does it need during the first year?
Water consistently to keep soil moist; this fern is not drought tolerant when newly planted. Place it in full or part shade, and mulch around the base with 1-2 inches of organic matter to retain moisture. Expect slower growth in the first year as it establishes; full vigor returns as the clump fills in.