Here's some tips on how to care for an Adiantum raddianum (Maidenhair Fern), so that you can get the best out of this plant's bouncy fronds.
The Maidenhair Fern
Called the maidenhair fern due to its delicate, light and flowy foliage, the Adiantum fern is a genus comprising of over 250 species. Adiantum raddianum, also called the 'Delta maidenhair 'or 'Venus Hair' Fern, makes for an interesting addition to any place that can cater for its slightly fussy fronds.
A perennial evergreen fern with a native range from Tropical America to the West Indies, this plant's botanical name is derived from the Greek word ‘adiantos’ (unwetted), as you'll notice that water rolls off this plants tender leaves.
Light
The Adiantum raddianum thrives in partial to shaded conditions, enjoying soft, bright, indirect or filtered/diffused light. Harsh sunlight can burn its delicate fronds.
If grown in full shade, the Maidenhair Fern's foliage will lose its vitality, so try to find a spot in your home that benefits from lots of bright indirect light.
Soil
Your Maidenhair Fern prefers its soil to be consistently moist all the time, but not soaking. A well draining soil with some water retention is ideal. Adding perlite and vermiculite to your soil mix will help add drainage while maintaining some water retention.
Watering
This Adiantum needs regular watering, but must not sit in water or its roots will rot. Keep an eye on your soil and water when it's almost dry. Try to avoid letting the plants roots totally dry out and avoid extended periods of drought or foliage may start dropping and die back quickly.
Humidity
Adiantum raddianum likes some humidity. To help, mist your plant every couple of days, or locate your plant in an area of the house where atmospheric humidity is generally higher such as a kitchen or bathroom (as long as it gets adequate light there).
To increase the humidity around your plant you can also stand it on a tray of pebbles with water underneath.
Temperature
The ideal temperature for your Delta Maidenhair Fern is between 18–24°C and the minimum is ideally 13°C.
Try to avoid placing your Adiantum in drafty areas or near radiators and other heat registers which can make the temperature fluctuate too wildly.
Toxicity
The Adiantum raddianum Maidenhair Fern is non-toxic for pets and humans.
Growth
This Delta Maidenhair Fern's fronds grow on average to 12 inches wide and 18 inches long.