Light
Bright indirect • approx. 10,000–20,000 lux



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Adiantum raddianum produces a loose cloud of small fan-shaped leaflets on wiry black stems, giving it one of the lightest textures among commonly grown ferns. Mature fronds can reach around 45 cm long and 30 cm wide, but the plant still reads as airy rather than bulky.
It wants bright filtered light, a moisture-retentive yet draining substrate, and consistent humidity around 60–80%. The root zone should never be allowed to go bone dry, though stagnant water is just as damaging. Sudden cold drafts, dry air, or missed watering show quickly as brown tips and shed pinnae, so even growth depends on steady care.
Because it is spore-producing rather than flowering, foliage quality is the whole point of keeping it well. Division at repotting is the normal propagation method.
Light
Bright indirect • approx. 10,000–20,000 lux
Water
Water when ~5–15% dry
Substrate
Moisture-retentive + airy • Steady-moist • Organic-forward • Fine
Temperature
Ideal: 18–24 °C • Avoid below: 15 °C
Humidity
Humid 60–80 % +
Growth habit
clumping fern
Support
not needed
Growth speed
Slow
Max size indoors
Max. height: 45 cm • Max. spread: 50 cm
Toxicity & safety
Non-toxic & Pet Friendly
Origin & habitat
Mexico to Tropical America; wet tropical habitat
These metrics are standardised reference points. We compile them by reviewing and cross-checking multiple botanical and horticultural references, then refining them through real-world growing experience. Source links: Plant Care Resources.
Please use the values as guidance. Conditions vary by home, so the same plant can respond differently. For plant-specific context, read the full product description and browse our Plant Care Guides.
Your new plant has just travelled a long way and needs a calm start in its new home. For step-by-step unboxing and first-week care, check our after-delivery care guide. For deeper tips on how your plant settles in over the next weeks, read our houseplant acclimatization guide.