Maidenhair Fern Plant Care

Adiantum raddianum C.Presl

Adiantum raddianum, the Delta maidenhair fern, is one of the most popular ferns to grow indoors. It is native to South America and its common name comes from its shiny, dark leafstalks that resemble human hair.

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Water

Every 3–7 days

Light

Bright indirect light

Temp

60–75°F

Humidity

50–80%

What Is the Maidenhair Fern?

Maidenhair Fern (Adiantum raddianum) belongs to the Pteridaceae family within the Adiantum genus. Maidenhair Fern is native to South America and its common name comes from its shiny, dark leafstalks that resemble human hair. Maidenhair Fern is also known as Delta Maidenhair Fern, Blackstem Maidenhair Fern, Common Maidenhair Fern.

Maidenhair Fern displays a fern with delicate fronds growth habit, reaching up to 1.5 inches tall with a spread of approximately 1.5 inches. Maidenhair Fern produces non-flowering plant.

Leaf size: approximately 12 inches.

How Often Should You Water a Maidenhair Fern?

Adiantum raddianum requires watering every 3–7 days. Allow the top layer of soil to dry between waterings to prevent root rot. Reduce watering frequency during winter when growth slows.

Watering Frequency

Every 3–7 days

Let soil partially dry between waterings

What Light Does the Maidenhair Fern Need?

Maidenhair Fern thrives in bright indirect light light conditions. The optimal light range is 100–500 lux. Avoid placing Maidenhair Fern in direct, harsh sunlight for extended periods, as this can scorch the foliage.

Light Requirement

Bright indirect light

100–500 lux

What Temperature and Humidity Does the Maidenhair Fern Prefer?

Adiantum raddianum grows best at temperatures between 60°F and 75°F. Maidenhair Fern prefers humidity levels of 50–80%. A pebble tray or humidifier helps maintain adequate moisture around the plant.

Temperature

60–75°F

Humidity

50–80%

What Soil Mix Works Best for a Maidenhair Fern?

Rich, well-draining soil with high organic matter content. Good drainage is essential for Maidenhair Fern to prevent waterlogging, which leads to root rot and fungal issues.

How Do You Repot a Maidenhair Fern?

Repot every 1-2 years in spring. Choose a pot one size larger than the current container, and ensure it has drainage holes to allow excess water to escape.

How Do You Propagate a Maidenhair Fern?

Maidenhair Fern can be propagated through spores, division of rhizomes. Similar propagation techniques also apply to northern maidenhair fern plant care, which shares the same genus.

Fertilizing

Every 6 months

During the growing season

Is the Maidenhair Fern Toxic to Pets and Children?

Non-Toxic

Non-toxic to humans and pets

What Pests and Diseases Affect the Maidenhair Fern?

Maidenhair Fern is susceptible to aphids, scale insects, spider mites. Inspect the foliage regularly, especially along leaf undersides and stems. Treat infestations promptly with insecticidal soap or neem oil to prevent spread.

What USDA Hardiness Zone Does the Maidenhair Fern Need?

Maidenhair Fern grows outdoors in USDA Zone 10b – 12b. Native to South America and its common name comes from its shiny, dark leafstalks that resemble human hair, Maidenhair Fern is adapted to warm climates. In cooler regions, grow Maidenhair Fern as a houseplant or bring it indoors before the first frost.

Hardiness Zone

Zone 10b – 12b

Keep exploring plants

Maidenhair Fern is one of many species covered in the complete plant care and identification guide, which groups plants by genus, attribute, and popularity.

It belongs to the Adiantum genus — compare its care with other Adiantum species on PlantoScan.

Maidenhair Fern thrives in bright light and direct sun — see other bright-light plants.

More Adiantum Species

Other Adiantum species in PlantoScan's care catalogue share similar watering, light, and soil preferences:

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