What it needs & gives back
↓ Needs
Lightfull sun to partial shade
Waterlow to medium
↑ Gives back
Mulch_biomasshigh
Shademedium to high
Companions
treetreetree
Black walnut
Black locust is tolerant of juglone and can fix nitrogen, potentially benefiting nearby walnuts.
Heartnut
Nitrogen-fixing trees can benefit walnuts by improving soil fertility, provided they are tolerant to juglone.
English walnut
Black locust is tolerant to juglone and can fix nitrogen, potentially benefiting walnuts.
Through the year
Through the year
JFMAMJJASOND
emergenceLeaves emerge after the last spring frost and when air temperatures consistently rise above 10°C.
floweringFlowers typically appear about a month after leaf emergence.
fruitingPods containing seeds develop after flowering and mature over the summer.
senescenceLeaves begin to yellow and drop with the first autumn frosts.
dormancyThe tree enters dormancy shortly after leaf senescence, lasting through winter.
Soil interactions
Drainagewell-drained to moderately drained
Nitrogen fixingYes
MycorrhizalYes
Accumulatesnitrogen
Soil texturesandy, loamy, clay
Organic matterHigh
Compaction toleranceHigh
Propagation
Methodsseed, cuttings, suckers
Difficulty2 / 5
Establishes in~2 yr
Stratificationrequires scarification and cold stratification
Self-seedingAggressive
Divisionlate_winter_early_spring
Wildlife & pests
Attractsbees, pollinators
Can host pestslocust borer
Can host diseaseswood rot, canker