Dwarf/small ferns (typically under 30cm)

Asplenium trichomanes
Dryopteris affinis 'Crispa Gracilis'
Gymnocarpium dryopteris 'Plumosum'
Polypodium vulgare
Polypodium vulgare 'Bifido-multifidum'
Polypodium scouleri
Polystichum setiferum 'Congesta'