Cretan Climbing Fern (Old World Climbing Fern) care

Light

Cretan Climbing Fern is what florists mean by "bright spot, no direct sun" — close enough to a south or east window to feel the brightness, with a sheer curtain or a few feet of distance keeping the sun off the leaves. Bright, indirect light. Tolerates part shade, where it grows in the wild, but better light keeps growth full. Avoid harsh direct sun, which can scorch the small leaflets. A phone lux-meter at the leaf surface should read 1,500-3,000 lux at noon.

Watering

Water cretan climbing fern when the top 2-3 cm of soil is dry, roughly every 4-7 days. The actual day count varies with pot size, light, and season — the finger test (or lifting the pot to feel its weight) is more reliable than a fixed calendar. Empty any drainage saucer afterwards so the pot isn't sitting in water. Keep evenly moist during active growth; this wetland-edge fern dislikes drying out completely. Ensure the pot drains so the roots are never waterlogged. Reduce watering somewhat in winter.

Soil and pot

Cretan Climbing Fern grows best in moisture-retentive, well-draining mix. Humus-rich, peat-free or coir-based potting mix with perlite for drainage. Slightly acidic. It naturally grows in damp soils, so the mix should hold moisture without becoming stagnant. A pot with a working drainage hole is non-negotiable for this species — even free-draining mix will turn soggy in a closed planter. If you love the look of a decorative pot without a hole, use it as a cachepot around an inner nursery pot you can lift out to water.

Humidity and temperature

Cretan Climbing Fern sits happiest at around 50-70% humidity and 18-28°C (64-82°F). Prefers moderate to high humidity reflecting its wetland habitat. A humidifier, pebble tray, or humid room keeps the fine foliage from browning. Dry indoor air crisps the leaflets. If you keep the room above 18 year-round and avoid placing the plant near a cold draught, a hot radiator, or an air-conditioning vent, you have already handled the two biggest indoor stressors.

Fertilising

Feed cretan climbing fern sparingly. Feed monthly in spring and summer with a balanced liquid fertiliser at half strength. It grows vigorously, so light regular feeding supports the long climbing fronds. Stop feeding in winter. Skip fertiliser entirely on a stressed, recently-repotted, or actively wilting plant — fertiliser salts make damage worse, not better. Wait for a round of healthy new growth before resuming a feeding rhythm.

Common problems

Below are the issues we see most often on cretan climbing fern in the Growli community. Each is annotated with the most common cause so you know where to start.

• Tangled, unruly growth — The indefinitely extending fronds twine into a mat if not trained. Provide a trellis early and guide or trim the leading tips.
• Browning, crispy leaflets — Low humidity or the soil drying out. Raise humidity and keep moisture steadier.
• Yellowing fronds — Waterlogged roots or low light. Improve drainage and brighten the position.
• Escape and invasiveness — Spores spread easily and the plant is invasive in warm regions. Keep it contained indoors and bag spent fronds rather than composting outdoors.

Propagation

Divide the rhizome of an established plant in spring, ensuring each piece has roots and a growing frond. Spores germinate readily but should be handled carefully given the species' invasiveness; avoid releasing spores outdoors. Propagation is the cheapest, most satisfying way to expand a collection — and it doubles as insurance against losing a mature plant to an accident. Take a backup cutting once the parent is established and healthy.

Toxicity to pets

Cretan Climbing Fern is mildly toxic to pets. Not individually listed by the ASPCA, so treat with caution and verify with a vet. There is no ASPCA genus rule for Lygodium. Its pet safety is not formally established, so keep it away from curious pets and consult a vet if a pet grazes it. Separately, note this species is a highly invasive weed; dispose of clippings responsibly and never plant it outdoors in mild climates. If you keep cats, dogs, or curious children in the house, weigh placement carefully — a high shelf or a hanging planter is enough for casual safety. For severe ingestion incidents, call your local vet and the ASPCA Animal Poison Control Center (in the US, 888-426-4435).

Pet-safety status is sourced from the ASPCA Toxic and Non-Toxic Plant List, which catalogues the most-asked-about plants for cats, dogs, and horses.

Cretan Climbing Fern deep-dive guides

Every aspect of cretan climbing fern care, each with its own calibrated guide:

• Cretan Climbing Fern watering schedule
• Cretan Climbing Fern light requirements
• Best soil mix for cretan climbing fern
• Cretan Climbing Fern fertilizing guide
• When to repot cretan climbing fern
• How to propagate cretan climbing fern
• Cretan Climbing Fern growth rate & size
• Cretan Climbing Fern cold hardiness
• Cretan Climbing Fern temperature & humidity
• Is cretan climbing fern toxic to cats & dogs?
• Is cretan climbing fern toxic to cats?
• Is cretan climbing fern toxic to dogs?

Featured in these plant shortlists

Cretan Climbing Fern qualifies for 3 curated Growli shortlists — each one filtered objectively from our structured plant-care library, so the selection is consistent and checkable:

• Best plants for a north-facing window — Houseplants for a north-facing window: bright, even, indirect light and no scorching direct sun. Each pick verified against its documented light needs.
• Best trailing & climbing houseplants — Vining and trailing houseplants for shelves, hanging pots, and moss poles — selected by growth habit.
• Best humidity-loving houseplants — Houseplants that thrive in a bathroom, kitchen, or by a humidifier — selected by documented humidity preference.
• Browse all 29 plant shortlists — pet-safe, low-light, drought-tolerant and more

Related guides

Cretan Climbing Fern is also commonly called Old World Climbing Fern or Small-leaved Climbing Fern.

• Snake plant care — light, water and common problems
• Dracaena care — light, water and common problems
• Peperomia care — light, water and common problems
• All 2464 plant care guides in the Growli library