Poisonous Garden Plants ListsThe following list are of plants which are known to be poisonous or irritant or otherwise harmful. The list is not exhaustive, or complete. | 1 - Considered to be the most dangerous - some lethal if eaten! Aconitum - Monkshood
Arum - Cuckoo pint.
Colchicum - The autumn crocus - Can be fatal if eaten
Convallaria - Lily of the Valley
Cytisus - the Broom - All parts can be fatal if eaten.
Daphne - Shrub grown for its beautifully scented flowers-Can be Fatal
Delphinium - All parts Highly toxic - can be fatal if eaten
Digitalis - Foxgloves are everywhere.
Gloriosa superba - The beautiful Gloriosa Lily!
Laburnum - Beautiful golden rain flowers; Can be Fatal if eaten
Lantana - Now very popular in the summer border or planted tub!
Nerium - A beautiful conservatory plant
Phytolacca - The poke weed
Ricinus communis - Castor Oil Plant. Not to be confused with Fatsia.
Taxus - A hedge favourite.
Veratrum - The false Hellebore. |
Lantana (Other colours available)  
Ricinus (Castor Oil Plant) Digitalis (Foxglove)
 
Laburnum (Golden Rain) Daphne mezereum Rubrum
Convallaria (Lily of the Valley)
The following are also considered to be either poisonous or skin irritants. The severity of the problems caused by skin irritant plants should not be underestimated. Once a reaction has occurred, it can cause severe skin problems for years if not life. Some of those listed below are poisonous - some are skin allergens. There are more that we will be adding to the list as time goes by. | Aesculus - Horse Chestnut | | Alstroemeria - The Peruvian Lily | | Aquilegia - Garden Columbine - Ladies Bonnet | | Caltha - The Marsh Marigold | | Chrysanthemum - now known as Dendranthema - Severe skin irritation | | Cup. Leylandii | | Datura - Angels Tears | | Dicentra spectabilis - Bleeding Heart | | Dictamnus alba | | Euonymus | | Euphorbia - the Spurge | | Fremontodendron - Californian Poppy | | Gaultheria - Popular ground cover plant | | Gloriosa Lily | | Hedera helix - common ivy - or it's variegated forms | | Helleborus - The Christmas or Lenten Rose | | Hyacinthus - Potted or garden | | Hypericum | | Ipomoea - The Morning Glory (Seeds) | | Iris | | Juniperus sabina - Low growing Juniper (Seeds or foliage) | | Kalmia - Calico Bush | | Ligustrum - Privet hedges etc | | Lobelia - the perennial types | | Lupinus - Lupins |
| Narcissus - Daffodils etc | | Nerium - The Oleander | | Phytolacca - The Poke Weed or Poke Root | | Polygonatum - Solomon's Seal | | Primula obconica - a treacherous house plant | | Rhamnus - The Sea Buckthorn | | Rheum - Looks like Rhubarb | | Ruta graveolens - sold as a herb - even now without warning! | | Scilla - beautiful bulbous plant with blue flowers | Solanum tuberosum - The POTATO green parts.
Symphytum - Comfrey has many toxic properties - A herb indeed! | | Thuja occidentalis - Often sold as a hedging conifer | | Tulip - The tulip bulbs can be severe skin allergen | | Wisteria. | | |
Comfrey - Sometimes white or blue flowered - Toxic!
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