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Brittle Bladder Fern

Cystopteris fragilis

Care
Sun

part shade

Container

Friendly

Native Range

Northern and central California in moist riparian and canyon habitats, 1000-6000 ft elevation, extending to Oregon and eastward.

Care Guide

Planting

Plant your Brittle Bladder Fern in deep shade or partial shade - it thrives in the shady, moist conditions of the Bay Area's native understory. The data doesn't specify soil type or drainage requirements, so observe your plant in its first season to learn what works best in your garden's microclimate.

After Planting

Water consistently to keep the soil moist, especially during your first summer, since this fern is naturally found in moist areas. Watch for the fronds becoming brittle or drooping excessively, which signals either too little water or too much direct sun - adjust accordingly. The main mistake is treating it like a typical houseplant that tolerates dry conditions; this fern needs steady moisture to thrive.

Visit Calscape for more information about Brittle Bladder Fern

Wildlife Supported

Birds

Shelter · Year-Round

Dense fern fronds provide ground cover and nesting shelter in riparian and shaded forest habitats

Foliage · Year-Round

Consume arthropods and occasional seeds from fern habitat

Foliage · Year-Round

Coots graze on fern vegetation in freshwater marshes and pond margins

Shelter · Year-Round

Uses fern clumps for protective cover and potential nesting substrate in mixed woodlands

Foliage · Year-Round

Forage on arthropods associated with fern fronds throughout the year

Foliage · Year-Round

Dabbling ducks consume fern fronds as supplemental vegetation in wetland habitats

Insects

Larval Host · Year-Round

Common fungal associate on fern fronds in humid microhabitats; part of decomposer community

Larval Host · Year-Round

Pathogenic fungus associated with fern fronds; part of natural decomposition community

Where to Buy
East Bay Wilds

2110 Eighth St, Suite 202, Berkeley

Fri 9:30am-4pm (occasional Sat, call ahead)

1.5 mi(510) 409-5858WebsiteDirections
Native Here Nursery

101 Golf Course Dr, Tilden Regional Park, Berkeley

Sat 10am-2pm

3.0 mi(510) 549-0211WebsiteDirections