Flora of Northern Ireland

Garden weeds

Many species occur as unwanted weeds in gardens. Among the commonest or biggest nuisances are:

Ground elder Aegopodium podagraria
Cow parsley Anthriscus sylvestris
Thale cress Arabidopsis thaliana
Daisy Bellis perennis
Bindweed Calystegia sepium ssp. sepium
New Zealand bittercress Cardamine corymbosa
Hairy bittercress Cardamine hirsuta
Couch grass Elytrigia repens
New Zealand willowherb Epilobium brunnescens
American willowherb Epilobium ciliatum
Common horsetail Equisetum arvense
Hogweed Heracleum sphondylium ssp. sphondylium
Creeping buttercup Ranunculus repens
Broad-leaved dock Rumex obtusifolius
Groundsel Senecio vulgaris
Dandelion Taraxacum officinale
Nettle Urtica dioica

Many exotic shrubs introduced for garden purposes have become nuisances both within gardens and in the wild. Notorious examples are rhododendron (Rhododendron ponticum and its hybrids), pirri-pirri bur (Acaena ovalifolia and allied species), snowberry (Symphoricarpus rivularis), Japanese knotweed (Fallopia japonica).