Black Walnut
Juglans nigra
Juglandaceae · broadleaf · introduced
Quick Facts
Height
100 ft
Spread
65 ft
Growth Rate
Fast
Light
Full Sun
Soil
Well Drained
Water
High
Hardiness
Zone Zones 4a–8b
Bloom Time
May to June
Origin
Massachusetts to Florida, west to Minnesota and Texas
Phenological Calendar
| Stage | Typical Window |
|---|---|
| Bud break BBCH 07 | Feb 15-Mar 15 |
| Leaf emergence BBCH 11 | Mar 1-Apr 1 |
| Bloom start BBCH 61 | May 1-May 31 |
| Bloom end / petal fall BBCH 69 | May 15-Jun 15 |
| Fruit/seed development BBCH 71 | Sep 1-Nov 30 |
| Leaf drop BBCH 93 | Oct 15-Nov 30 |
| Dormancy BBCH 97 | Nov 15-Feb 28 |
Diseases (7)
Various species including Colletotrichum acutatum, C Anthracnose
Black Walnut Toxicity
Rhizobium radiobacter (formerly Agrobacterium tumefaciens) Crown Gall
Downy Leaf Spot
Mosses and Lichens
Phytophthora spp. (P Phytophthora Root Rot
Geosmithia morbida (vectored by Pityophthorus juglandis) Thousand Cankers Disease