Botanical Name:
Juglans californica
Common Name: Southern California black walnut Type of Plant: dicot: tree Character deciduous Habit of Growth: Overall Shape an erect, mostly multi-trunked plant, with ascending and spreading branches forming a rounded, somewhat open canopy; unpruned plants tend to become very shrubby Height 15-30' (50') Spread 3/4 to equal Growth Rate mod-rapid Environment: Exposure outdoors full or partial sun Soil prefers a deep loam; tolerates most except dry alkaline Hardiness hardy (zones 18-24); thrives in warm sunny coast Morphology: Leaves odd-pinnately compound, alternate, 6-10" long; leaflets are lanceolate-oblong, 11-19, 1-3" long, smooth, finely serrate, aromatic Flowers monoecious; staminate flowers are in drooping catkins, pistillate flowers in small spikes at ends of branches; spring Fruit drupaceous nut:1/2-1" diameter w/leathery husk;smooth shell Propagation: seed Usage: attractive small accent tree valued for form and foliage; suitable for large background shrub or screen, good for dry slopes, informal landscapes; resistant to oak root fungus Landscape Care: Watering occasional deep soak; very drought-tolerant after established Fertilizing very little required Pruning as a tree, head high when young; little pruning necessary Pests/Diseases aphids, sooty mold, scale Special Conditions/Other Origin: Southern California Family: Juglandaceae Notes: |
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