Ferns are ideal plants for terrariums and bright rooms without direct sunlight. Here's the essential guide to growing them well, whether terrestrial or epiphytic.

Light and placement

1 - What light do ferns need?

Bright but diffused light. Avoid direct sunlight, including through glass, which can burn the delicate foliage of most species.

2 - Do ferns tolerate shade?

Yes, most species do well in partial to full shade, making them good candidates for the less bright corners of a home or terrarium.

Humidity and watering

3 - What humidity level suits them?

Between 60 and 80% depending on the species, with gentle ventilation to avoid stagnant air. This is why terrarium growing suits them particularly well.

4 - How should a fern be watered?

Regularly but moderately: the substrate should stay moist without ever being permanently saturated. Good drainage is essential to avoid root rot.

Substrate and support

5 - What substrate should be used?

A well-draining substrate, suited to the species: some ferns tolerate calcareous or neutral soil, unlike carnivorous plants which require an acidic, nutrient-poor substrate.

6 - Do epiphytic species need a special support?

Yes, epiphytic ferns grow well on xaxim, bark, or a light, airy mix rather than in a standard pot.

General care

7 - Should ferns be fertilised?

Yes, unlike carnivorous plants: a light, occasional fertiliser suits ferns well, as they aren't adapted to a nutrient-poor substrate.

8 - Can ferns be grown outdoors?

Some hardy species tolerate cold well, down to -15/-20°C for the toughest ones, and adapt well to shaded corners of a garden.

Successfully growing ferns

Diffused light, high humidity and regular watering without excess are enough to make most ferns thrive. Unlike carnivorous plants, they appreciate a light dose of fertiliser and a more conventional substrate.

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