Plot

When to plant and prune Soft Shield Fern

Soft Shield Fern is grown for foliage and form rather than flowers and the dates below cover planting, flowering and the pruning window.

Polystichum setiferum · Easy to grow

Planting, flowering and pruning by region

Soft Shield Fern is grown to the calendar rather than to the frost, so the same dates apply across the whole UK and every region below reads the same. Where a plant’s timings do follow the frost, Plot shifts them from the Midlands and Lowland Wales baseline using Met Office average frost dates.

Where you arePlantPrune
South West Coast and Cornwalllate March to early Mayearly February to early March
South Coast and Channellate March to early Mayearly February to early March
Greater London (Urban Heat Island)late March to early Mayearly February to early March
South East and Home Countieslate March to early Mayearly February to early March
East Anglialate March to early Mayearly February to early March
Midlands and Lowland Waleslate March to early Mayearly February to early March
Wales and West Coastlate March to early Mayearly February to early March
Northern Englandlate March to early Mayearly February to early March
Scotland Lowlands and Central Beltlate March to early Mayearly February to early March
Scotland Highlands and Islandslate March to early Mayearly February to early March
Northern Irelandlate March to early Mayearly February to early March
Channel Islands and Isle of Manlate March to early Mayearly February to early March

Growing notes

A native evergreen fern that gives structure in a shady bed all winter, which the deciduous ferns cannot. Shelter it from strong wind so the soft fronds do not shred.

At a glance

Spacing
80 cm between plants
Eventual height
100 cm
Eventual spread
100 cm
Hardiness
H7
Sun
Shade tolerant
Frost tender
No
Grows in a container
Yes, 20 litres or more
Balcony rating
4 out of 5

Pruning: what to avoid

This one keeps its fronds through winter, so do not clear the whole plant. Remove just the collapsed or browned fronds in late winter, and finish before the new croziers begin to unroll.

Pruning group

Evergreen: remove only the tattiest old fronds at the base in late winter before new growth

What usually goes wrong

Related guides

Timings cross-checked against RHS guidance for soft shield fern.