Kwik-Krop black walnut tree is a cultivar of black walnut, a native tree species to North America. It grows rather fast when young but will slow down after it matures, preferring full sun and wet to dry loam or sandy high acidic to slightly alkaline soil. Nut production can sometimes begin as early as 6 years but usually takes many years for a substantial crop. It is cold and heat tolerant when established. The taproot contains juglone which might inhibit the growth of some plants such as azaleas, peonies, some vegetables like tomatoes, and blueberries beneath the tree's dripline. Once used by Native Americans medicinally, it is a source for lumber used in furniture and veneer. This tree grows upright with a rounded crown. VIDEO Created by Elisabeth Meyer for "Vegetables, Herbs, Fruits, and Nuts," a plant identification course developed in partnership with Longwood Gardens. More information on Juglans nigra .
Curated pairwise relationships between this plant and others in the library — who feeds
whom, who competes, who confuses the pests. Green reads as a good pairing, red as one to avoid.
No curated interactions recorded for this species yet.
Also noted by NC State
Related species the NC State Plant Toolbox flags for this plant — look-alikes to tell
apart, and plants that play a similar role in a planting. Ones we carry in the library are linked.
Full sun (6 or more hours of direct sunlight a day)
Soil pH
Neutral (6.0-8.0)
Soil drainage
Good Drainage | Moist
NC region
Coastal; Mountains; Piedmont
Mature size
Height: 40 ft. 0 in. - 60 ft. 0 in. | Width: 40 ft. 0 in. - 60 ft. 0 in.
Growth rate
Rapid
Canopy layer
1 - Canopy (>40 ft)
Form & Appearance
Habit / form
Oval; Rounded
Texture
Medium
Foliage
Deciduous
Leaf color
Gold/Yellow; Green
Leaf type
Compound (Pinnately , Bipinnately, Palmately)
Leaf arrangement
Alternate
Leaf shape
Lanceolate; Ovate
Leaf margin
Serrate
Leaf size
> 6 inches long, 3-6 inches wide
Hairs present
No
Leaf detail
12-24" long leaves with 15-23 leaflets, ovate-lanceolate and finely serrate. 3-lobed leaf scar resembling a monkey face. Leaves drop sporadically during the season. More ovate, more leaflets, and less serrated margins than pecan.
Fall color
Gold/Yellow; Insignificant
Flower color
Gold/Yellow; Green
Flower form
Catkin
Flower size
3-6 inches
Flower detail
Single-stemmed yellow-green male catkins are 2 ½ to 5 ½ in long, appearing in axillary buds on the previous year's growth. Female flowers are short-spiked in terminal clusters of two to five on the current year's growth. Flowers from April to May and are wind pollinated.
Bloom time
Spring
Fruit color
Black; Brown/Copper; Gold/Yellow; Green
Fruit type
Nut
Fruit value
Edible
Fruit size
1-3 inches long, 1-3 inches wide
Fruit detail
Brown to black nut inside a fleshy, non-splitting, yellow-green husk that heavily stains skin and clothing. Displays in October. The edible nut is easy to slip off the husk and contains more than 30% kernel.
Bark color
Black; Dark Brown
Bark detail
Brown ridged and furrowed with rough diamond pattern bark
Stem color
Black; Brown/Copper
Stem detail
V-shaped leaf scar with a bud nestled inside. The surface has raised lenticels and the pith is chambered.
Wildlife & Ecology
Native status
Unknown
Attracts
Small Mammals
Food & Medicine
Edible parts
Fruit
Harvest time
Fall
Fruit type
Nut
Landscape Use
Landscape theme
Edible Garden
Garden tags
#deciduous #heat tolerant #native garden #ebh #single trunk #ebh-fn #Piedmont Mountains FACU #food source herbage #food source hard mast fruit #juglone #mammals #nuts #larval host plant #edible nuts #butterfly friendly #shade tree #coastal UPL #food source fall #native edible #woodland