Adiantum raddianum Fragrans, aptly named Delta for the unusual shape of itsrachis (stems) that branch out like an intricate river system. This delicate and beautiful fern originates in the West Indies and boasts deep black fronds and lime greenpinnae(leaves.)
Generally speaking it's one of the tougher plants to get right, but like most plants once you do get it in the right spot with a decent routine it's very easy to maintain and grow.
Highly ornamental, the lobed segments in the foliage create a lacey appearance that makes it particularly popular in terrariums. It will doubtless flourish in a darker steamy bathroom or kitchen.
They are slow growing and will only reach an ultimate height of around 60cm, at which point it will continue to bush out.
The most important thing is not to let them dry out completely or be exposed to direct sunlight. They can also be sensitive to hard water as well as very dry air. One plant that sometimes people don't always get right the first time, but a logical choice for those who are known to kill low-maintenance plants though over-caring.
Temperature Really likes it warm but not at the expense of humidity. Keep well away from radiators, underfloor heating and fireplaces.
WateringKeep them pretty moist, especially during summer. In the winter allow them to dry out slightly but still keep an eye on them. Hard water may possibly harm this plant.
Feeding A very well diluted plant food (half strength) once a month during the height of summer will aid this plant greatly. Do not feed at all over winter.
Tips A pebble tray is a great way to provide this plant with the humidity it needs to thrive. If you notice salt deposits on the soil, it may be hard water from your tap. Try to use rainwater in this scenario.
Light Level Any direct sunshine will scorch the leaves irreparably. It will also struggle in the darkest areas, so try to maintain a happy medium.