Ophioglossaceae
Southern grape fern: Best for Low Light
Botrychium biternatum
This is a wild woodland fern that is very difficult to keep in cultivation. It relies on mycorrhizal fungi in the soil, so it does not transplant or pot well and is best left in place or grown only in a woodland garden with undisturbed native soil. Give it shade, evenly moist but well-drained loamy soil with a mildly acidic pH, and avoid fertilizing or disturbing the roots. It is hardy in USDA zones 4 to 9.
Every 4 days
Low light
-29° - °C
% - %
Categories
What is Southern grape fern?
Southern grape fern (Botrychium biternatum) is a hard-care plant from the Ophioglossaceae family. Botrychium biternatum, now often treated as Sceptridium biternatum, is a perennial fern of the adder's-tongue family (Ophioglossaceae) native to the eastern and southern United States, from Texas to the Atlantic coast. It grows to about 30 cm tall and bears a thin-textured, twice to three times divi...
Southern grape fern grows up to 30cm, watering every 4 days. It is not suitable for indoor environments and safe for pets.
Unlike easy-care plants, Southern grape fern demands constant attention to humidity and light. Not recommended for beginners. Unlike many popular species, Southern grape fern is safe to keep around pets.
How to Care for Southern grape fern?
TLDR: Southern grape fern needs Low light, watering every 4 days, and temperatures between -29-30°C with 40-70% humidity.
How Often Should You Water Southern grape fern?
Keep the soil evenly moist but never waterlogged. Water when the top of the soil begins to dry, and mulch with leaf litter to hold moisture.
How Much Light Does Southern grape fern Need?
Prefers shade to dappled woodland light. Avoid hot, direct afternoon sun.
What Is the Best Soil for Southern grape fern?
Use loamy, humus-rich, well-drained soil with a mildly acidic pH of about 6.1 to 6.5. Keep native woodland soil intact because the fern needs its fungal partners.
What Pot Should You Use for Southern grape fern?
Not suited to pots. If container growing is attempted, use a deep, wide pot with drainage holes filled with native woodland soil.
What Is Southern grape fern and Where Does It Come From?
Botrychium biternatum, now often treated as Sceptridium biternatum, is a perennial fern of the adder's-tongue family (Ophioglossaceae) native to the eastern and southern United States, from Texas to the Atlantic coast. It grows to about 30 cm tall and bears a thin-textured, twice to three times divided sterile blade alongside a separate fertile stalk carrying clusters of spore cases that resemble tiny grapes. In autumn the fronds turn a reddish-brown or bronze, which earned it the local name red fern. It grows wild in low woods, hardwood and pine forests, fields and roadsides, and it depends on an underground mycorrhizal fungus partnership to survive.
How to Propagate Southern grape fern?
Spore Propagation
- Success is highly unlikely without the presence of specific endophytic fungi.
- Maintain constant moisture without saturation.
- 1 Spore Collection
Collect the yellow-brown spores from the fertile sporophore when they begin to shed in late autumn.
- 2 Sowing
Sow spores on a sterilized medium of peat and sand, ideally inoculated with native soil from the parent site.
- 3 Incubation
Keep in a dark, cool, and humid environment as the gametophytes are subterranean and non-photosynthetic.
Materials needed:
How Big Does Southern grape fern Grow?
TLDR: Southern grape fern can reach up to 30cm tall with Medium growth rate.
Max height
30cm
Foliage
Semi-evergreen
Plant Uses
Ornamental
Great for decoration
Is your plant showing symptoms?
Click on the symptom to discover possible causes:
What Diseases Commonly Affect Southern grape fern?
TLDR: Southern grape fern is susceptible to 1 known diseases. Monitor regularly for early detection.
Meaning & Symbolism
Its bronze-red autumn fronds and clusters of spore bodies resembling tiny grapes make it a quiet emblem of woodland renewal and hidden underground partnerships.
Compare with similar plants
| Attribute | Difficulty | Light | Watering | Pet Safe |
|---|---|---|---|---|
| Sticky false asphodel | Hard | Bright indirect | 1d | ✓ |
| Creeping bentgrass | Hard | Direct sun | 3d | ✓ |
| Bulbous Adder's-tongue | Hard | Partial shade | 4d | ✓ |
| Crystal Anthurium | Hard | Partial shade | 7d | ⚠️ |
