Cystopteris fragilis
Brittle bladder fern, Brittle fern
- Height × spread
- 0.2m × 0.2m
- Position
- Tolerates full sun, likes part shade, tolerates light shade
- Hardiness
- Colder than -20C (RHS H7)
Availability
Please ask in store about availability
Many plants are seasonal. Call 01234 567890 to check current stock.
About this plant
This is a pretty fern for rock crevices where it contributes frothy, fresh green colour with its delicate but plump fronds. It is lovely when grown in a small colony where, in humus-rich but well drained soil, it can enjoy a part shaded site.
- Foliage colour
- Green
- Variegated
- No
- Scent
- No
- Shape
- Fan
- Height
- 0.2m
- Spread
- 0.2m
- Evergreen
- Deciduous
- Garden style
- Shady court, Rock garden
- Sun or shade
- Tolerates full sun, likes part shade, tolerates light shade
- Soil type
- Clay, Gravelly soil, Loam (normal), Poor soil
- Soil pH
- All types
- Drainage
- Moisture retentive soil
- Hardiness
- Colder than -20C (RHS H7)
- Borders & containers
- Borders and containers
- Hazards
- No
Spring
Spring - late · Outdoors
Feed with slow release fertiliser
Apply a general purpose slow release fertiliser, spreading it around the root area of the plant as it is coming into growth. (Or apply a liquid feed at regular intervals throughout the growing season.)
This is a simple way to provide a nutrient boost as a single annual procedure.
Spring-Autumn · Outdoors
Water to keep the soil moist
For best results, this plant needs soil that is always moist. Water deeply and regularly as soon as soil appears dry. Even for established plants in the ground, a dry week can cause problems with some soils. Check plants in pots more often, especially in hot weather. Or install an automatic irrigation system which will do the hard work for you, even when you are away on holiday.
Without regular watering some plants never fully regain their beauty.
Spring - early-mid · Planting
Divide when too large
The plant can be divided if it becomes too large or another plant is required. This may involve physically dividing the clump in two, removing offsets or small bulbs or dividing rhizomes. The new plants can be grown in pots or planted in the ground.