The King of Ponds              The Salmon Family Garden Center since 1968
Arbordale Nurseries & Landscaping

Arbordale Nurseries & Landscaping

The King of Ponds                         The Salmon Familu Since 1968

Black Walnut Tree Toxicity

The Black Walnut (juglans nigra) is a vigorous hardy tree for Western New York.Unfortunately, the black walnut’s roots, which may extend 50 feet or more from the trunk, do exude a natural herbicide known as juglone that prevents many plants from growing within their reach. 

Tomatoes, potatoes, apples, pears, berries, and some landscape plants such as rhododendrons, azaleas, and lilacs may be killed or stunted if grown in close proximity to black walnut roots.




Plants that are generally sensitive to Black Walnut:

Vegetables

Asparagus

cabbage

eggplant

pepper

potato

rhubarb

tomato

Fruits

apple

blackberry

blueberry

pear

Landscape Plants

azalea

white birch

ornamental cherries

hydrangea

japanese larch

chokeberry

lilac

saucer magnolia

mugo pine

white pine

potentilla

privet

rhododendron

yew


flowers & perennials

baptista

chrysanthemum

columbine

lily

peony

petunia


Plants that appear to be tolerant of Black Walnut:

Vegetables

beans

beets

carrots

corn

onion

melon

parsnip

squash

fruits

black raspberry

cherry

landscape plants

arborvitae

barberry

cleamatis

daphne

dogwood

euonymus

forsythia

hawthorn

hemlock

honeysuckle

juniper

japanese maple

ninebark

oak

pachysandra

viburnum

virginia creeper

witchhazel

flowers & Perennials

astilbe

bee balm

begonia

bellflower

coralbells

cranesbill

grasses

hollyhock

hosta

iris

lungwort

pansy

phlox

marigold

spiderwort

sedum

sweet woodruff

trillium

tulip

violet

zinnia