Royal Fern Plant Care

Royal Fern (Osmunda regalis) belongs to the Osmundaceae family within the Osmunda genus. Royal Fern is native to Europe, North Africa and West Asia, growing in woodland bogs and on the banks of streams. Royal Fern is also known as Flowering fern, Old world royal fern.

Royal Fern displays a large, fern-like clumps growth habit, reaching up to 3 inches tall with a spread of approximately 2 inches. Royal Fern produces non-flowering fern.

Leaf size: approximately 24 inches.

Osmunda regalis requires watering every 3–5 days. Allow the top layer of soil to dry between waterings to prevent root rot. Reduce watering frequency during winter when growth slows.

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

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

Rich, moist, acidic soil with high organic matter content. Good drainage is essential for Royal Fern to prevent waterlogging, which leads to root rot and fungal issues.

Divide and repot every 3-5 years. Choose a pot one size larger than the current container, and ensure it has drainage holes to allow excess water to escape.

Royal Fern can be propagated through division of rhizomes, spores.

Royal Fern is susceptible to generally pest-free. Inspect the foliage regularly, especially along leaf undersides and stems. Treat infestations promptly with insecticidal soap or neem oil to prevent spread.

Royal Fern grows outdoors in USDA Zone 3a – 9b. Native to Europe, North Africa and West Asia, growing in woodland bogs and on the banks of streams, Royal Fern is adapted to warm climates. In cooler regions, grow Royal Fern as a houseplant or bring it indoors before the first frost.