Blue Oil Fern
Taxonomy
Microsorum thailandicum
Microsorum
Polypodiaceae
Polypodiales

How to care for Blue Oil Fern

How often to water your Blue Oil Fern

every 9
Blue Oil Fern needs 0.5 cups of water every 9 when it doesn’t get direct sunlight and is potted in a 5" pot.
Use our water calculator to personalize watering recommendations to your environment or download Greg for more advanced recommendations for all of your plants.
Water 0.5 cups every
9

Check the growing potential in your area
A plant's growing potential is determined from its location, the time of year, and current local weather.

Select a city to check sunlight intensity

Finding light for Blue Oil Fern in your home

a window
Blue Oil Fern can tolerate being far from a window and light source.
Place it less than 6 feet from a south-facing window to ensure it receives enough light to survive đź’Ş.
Select your region to see how the current weather in your area affects the placement of Blue Oil Fern in your home 🏡.

How to fertilize Blue Oil Fern

Most potting soils come with ample nutrients which plants use to produce new growth.
By the time your plant has depleted the nutrients in its soil it’s likely grown enough to need a larger pot anyway.
To replenish this plant's nutrients, repot your Blue Oil Fern after it doubles in size or once a year—whichever comes first.

Blue Oil Fern prefers for the soil to dry out between waterings and should be watered regularly. Use our water calculator to personalize watering recommendations to your environment or download Greg for more advanced recommendations for all of your plants.
Sunlight Needs
Blue Oil Fern can tolerate being far from a window and light source. Place it less than 6 feet from a south-facing window to ensure it receives enough light to survive 💪. Select your region to see how the current weather in your area affects the placement in your home 🏡.
Toxicity
Greg does not have confirmed data on this plant’s toxicity. If you, a family member, or a pet consumes plant material of unknown toxicity, it’s always best to consult a medical professional.
If you or someone else ingested this plant, call Poison Control at US (800) 222-1222. If a pet consumed this plant, contact your veterinarian or the ASPCA at US (888) 426-4435.
Humidity
Blue Oil Fern enjoys lots of humidity. Provide humidity for your plant by watering regularly and thoroughly, since plants absorb most water through their root system rather than their leaves. They may also benefit from being placed next to a humidifier.
Soil
Blue Oil Fern is very sensitive to dry soil, so choose a potting soil that retains moisture. A good soil will still drain well and contain lots of organic matter such as coco coir or sphagnum moss.
Fertilizer
Blue Oil Fern should be repotted after it doubles in size or once a year, whichever comes first. Fresh potting soil has all the nutrients your plant needs, so as long as it’s refreshed yearly, you shouldn’t need to use fertilizer. Remember, plants get their energy from sunlight, not fertilizer!
Native Region
Blue Oil Fern is native to Temperate and Tropical Old World.
Care Summary for Blue Oil Fern
Blue Oil Fern
Greg recommends:

0.5 cups every 9 days

< 6ft from a window

Repot after 2x growth
Based on the 4” pot your plant is in, and that it doesn’t get direct sunlight.
