Can walnuts kill other plants?

I've heard that walnuts can kill other plants. Is this true?
Submitted by BHGPhotoContest

Yes, walnut (Juglans spp.) is toxic to many other plants. Roots and leaves produce a toxin called juglone that adversely affects the growth of some species. Avoid growing the following plants near a walnut tree:

 

Common Name

Botanical Name

Zones

American linden
Apple
Asparagus
Autumn crocus
Blackberry
Bush cinquefoil
Cabbage
Common lilac
Common privet
Cotoneaster
Eastern white pine
European white birch
Flowering crabapple
Norway spruce
Peony
Pepper
Potato
Red pine
Rhododendron, Azalea
Saucer magnolia
Scotch pine
Tomato

Tilia americana
Malus sylvestris var. domestica
Asparagus officinalis
Colchicum autumnale
Rubus laciniatus
Potentilla fruticosa
Brassica oleracea capitata
Syringa vulgaris
Ligustrum vulgare
Cotoneaster spp.
Pinus strobus
Betula pendula
Malus spp.
Picea abies
Paeonia officinalis
Capsicum annuum
Solanum tuberosum
Pinus resinosa
Rhododendron spp.
Magnolia Ysoulangiana
Pinus sylvestris
Lycopersicon esculentum

3-8
3-10
4-9
5-9
4-9
2-6(7)
NA
3-7
4-7
4-7
3-7(8)
2-6
4-8
2-7
3-8
NA
NA
2-6
4-10
4-9
2-8
NA


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