Goldback fern
Pentagramma triangularis · Pteridaceae
The gardener's calendar
Ideal time to plant goldback fern: set it out when the soil is neither frozen nor waterlogged, and water generously as it establishes.
ID card
- Type
- Fern
- Foliage
- Evergreen
- Adult size
- 30 to 60 cm tall
- Growth
- Moderate
- Hardiness
- Tender (warm zones)
- Origin
- Warm regions of North America and Central America
- Light requirements
- Shade to partial shade
- Soil type
- Well-draining, rich in organic matter
Care
Watering
Keep the soil consistently moist but not waterlogged. Water regularly during warm periods, reducing watering in winter. Ferns appreciate humid air: mist the foliage or place the pot on a tray of moist pebbles.
Light
Prefer shade or partial shade, away from direct light which can scorch delicate fronds. This fern adapts well to bright indoor spaces without direct sun, particularly near north or east-facing windows.
Soil and potting mix
Use a rich organic mix, such as fern soil or well-draining peat-based mix. Good drainage is essential to prevent root rot. Regularly enrich with well-decomposed compost.
Pruning and trimming
Remove dead or damaged fronds at their base to promote vigor and appearance. Cut gently without damaging new fiddleheads. Clean the leaves regularly to prevent dust buildup.
Fertilizer
Apply a balanced, diluted fertilizer every 15 to 30 days during the growing season (spring-summer). Reduce applications in autumn and winter. Use a mild fertilizer to avoid excess that could damage sensitive roots.
Diseases and pests
Watch for spider mites and mealybugs, favored by dry air: increase ambient humidity and treat with soapy water spray if needed. Yellow fronds often indicate insufficient humidity or overwatering; adjust according to conditions.
Did you know?
The Pentagramma triangularis owes its scientific name to the distinctive triangular shape of its fronds reminiscent of a pentagram, particularly visible on new growth. This fern is remarkable for the powdery bluish tint covering the undersides of its fronds, a rare characteristic among ferns that makes it particularly decorative in the botanical garden or in indoor cultivation.
Where to buy it
Plant in spring or early autumn, avoiding spells of intense heat. Pick a plant with healthy foliage and roots that are not exposed. Best time: March, April, May, September.
Add this plant to my garden →Plants from the same family
- Maidenhair fernAdiantum capillus-veneris
- Northern maidenhair fernAdiantum pedatum
- Cheilanthes sieberiCheilanthes sieberi
- Parsley fernCryptogramma crispa
- Chinese ladder brakePteris vittata
- Adiantum aethiopicumAdiantum aethiopicum
Tips generated and checked by Viridia — adapt them to your local climate.