Pteris tremula is a terrestrial fern, with its fronds arising from the ground up to 1.3 m (4.3 ft), rarely up to 2 m (6.6 ft) tall. The stipe is brown. The light green lacy compound fronds may reach 2 m (6.6 ft) in length and are 3-pinnate or more. The brownish sori line the undersides of the frond margins. Unlike Pteris vittata and other Pteris species, it is not able to hyperaccumulate arsenic and is damaged by levels as low as 25 mg/kg in the soil. The plant contains two cytotoxic indanonic sesquiterpenes.
Pteris ferns are not overly demanding when it comes to water. While most ferns will almost immediately die if left to dry out, pteris ferns are a bit more tolerant of dry soil (though they are not drought-tolerant). For best results, aim to water your plant at a regular cadence, keeping the soil consistently moist. They don't like being waterlogged, either—plants that are allowed to sit in saturated or soggy soil will quickly succumb to root rot.
Pteris ferns prefer bright filtered light, similar to what they would receive in their natural tropical environment under the canopy of larger trees. Distilled light is especially important in the warmer summer months when the plant is actively growing. Avoid harsh direct rays, especially mid-day, which can singe or burn the leaves.
Feed your pteris ferns once a mother from April to September, using a a weak liquid fertilizer diluted to half-strength.
Luckily, pteris ferns are not picky about their soil mixture and can thrive well in basic potting soil. The mixture should be well-draining and easy to keep moist, but it should not get boggy or waterlogged. Generally, any peat-based mixture will allow the plant to thrive just fine.
Keep your pteris fern in a warm environment in your home. An ideal temperature range is between 65 degrees Fahrenheit and 75 degrees Fahrenheit, though the plant should never be allowed to dip below 55 degrees Fahrenheit. In addition, keep the plant away from any harsh drafts (either hot or cold), like those from an open window or radiator.
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