Microsorum Blue Oil Fern

Microsorum ‘Blue Oil’ is a unique tropical fern prized for its glossy blue-green foliage and unusual textured appearance. Its elongated fronds develop a rich metallic sheen that can shift between deep green, blue, and subtle silvery tones depending on the light. Unlike traditional feathery ferns, ‘Blue Oil’ produces bold, leathery foliage that gives it a clean, almost prehistoric look. Exotic, compact, and highly ornamental, this variety brings a lush rainforest feel to shelves, plant stands, terrariums, bathrooms, and indoor plant collections.

Key Features:

• Blue-green foliage – glossy fronds develop beautiful deep green, blue, and metallic tones that change subtly with the light.
• Unique fern texture – leathery, elongated foliage creates a bold appearance unlike traditional feathery ferns.
• Compact growth habit – stays manageable indoors, making it an excellent choice for shelves, tabletops, terrariums, and plant displays.
• Collector fern – prized for its unusual coloration, tropical character, and distinctive foliage.

Care Guide:

• Light: Prefers bright, indirect light to maintain healthy growth and its distinctive blue-green coloration. It can tolerate medium indirect light, but avoid prolonged direct sunlight, which can scorch the foliage.
• Water: Keep the growing medium lightly and consistently moist, allowing the surface to dry slightly between waterings. Avoid letting the plant remain completely dry for extended periods, but never allow the roots to sit in soggy soil.
• Humidity: Enjoys moderate to high humidity and performs especially well in humid indoor environments. A humidifier, plant cabinet, terrarium, or naturally humid room can encourage healthier foliage and stronger growth.
• Soil & Potting: Use a loose, well-draining mix that provides plenty of airflow around the roots and rhizomes. A combination of coco coir or peat, fine orchid bark, and perlite works well. Avoid burying the creeping rhizome too deeply.
• Fertilizer: Feed lightly with a diluted balanced liquid fertilizer about once a month during spring and summer while actively growing. Avoid heavy fertilization, as ferns can be sensitive to excess salts.
• Temperature: Thrives in warm indoor conditions around 65–80°F (18–27°C). Protect from cold drafts, air-conditioning vents, and temperatures below 55°F.

Growth & Size:

Slow to moderate-growing indoors; typically reaches around 12–24 inches tall and wide depending on growing conditions and maturity. As it grows, Microsorum ‘Blue Oil’ spreads through creeping rhizomes and gradually develops a fuller display of glossy blue-green fronds, making it an impressive tropical accent without requiring a large amount of space.

Safety Note:

Microsorum ‘Blue Oil’ is generally considered non-toxic to pets and humans, making it a good choice for households with cats, dogs, and children. While the plant is generally regarded as safe, it is still best to discourage chewing on the foliage to prevent unnecessary digestive upset and protect the fronds from damage.