Species Name: Polypodium formosanum ‘Cristatum’ 

Common name(s): ET Fern, Grub Fern, Caterpillar Fern  

Defining Characteristics: 

• Drooping, light green fronds that would do well in a hanging basket
• Fronds can grow up to 12” long but maintain an elegant, soft appearance
• Slow growing, easy pruning

Recommended Pot Size: Small - Medium 

Josh’s Frogs offers a wide variety of glass terrariums, container garden soils, drainage layers, and other supplies for all of your indoor gardening needs.

Temperature requirement: 70-80°F

Humidity: Dry (0-30%)   Moderate (30-70%)   Humid (70-100%) 

Watering frequency: Regular watering, allow the soil to dry between waterings. 

Lighting:  Full Shade      Partial Shade       Full Sun

Soil type: Well draining potting soil or a prepared soil mixture such as Josh's Frogs Potting Soil mix offered Here

Growth rate: Slow 

Height: Up to 18” 

Origin: East Asia, from Japan to Taiwan. On the mainland its found in Nepal, Laos, and Vietnam 

Regional locality: Epiphytic and terrestrial species that grows on tree trunks, cliffs, and under the shade at high elevations 

USDA Hardiness Zone: 9-11

Suggested Vivarium/ Animal Terrarium Use: 

Care Notes: This is not a fast-growing fern and it will take a bit of time to get a full size plant. That can work in your favor if you're trying to keep it contained in a small pot or terrarium.  It will thrive in a terrarium as it does appreciate a high humidity environment, but remember to allow for water drainage.

Shipping Notes: 

As a good practice, Josh's Frogs recommends washing all plants thoroughly removing as much soil as possible with dechlorinated water before placing them in their final home. Live plants may vary in color, size, and appearance.

ALL PLANTS ARE SHIPPED IN POTS WITH SOIL OR OTHER MEDIA UNLESS IT IS DEEMED NECESSARY TO SHIP BARE ROOT

The plant pictured is in a 2.5" pot.