Botanical Name: Macadamia tetraphylla (M. ternifolia)
Common Name: Rough-shell macadamia, Queensland nut
Type of Plant: dicot: tree
Character evergreen
 
Habit of Growth:
Overall Shape an erect, mostly single-trunked tree, with ascending and spreading branches, forming a dense oval canopy in youth - plants become wider - spreading with age
Height 20' - 40'(50')
Spread 2/3 to equal
Growth Rate moderate to rapid
 
Environment:
Exposure outdoors prefers full sun, tolerates partial at inland locations
Soil thrives in deep, rich loam - tolerates most
Hardiness (zones 9, 16, 17, 19-24): best in warm frost-free areas near coast
 
Morphology:
Leaves pinnate, alternate to whorled, 4"-10" (12") long; elliptic-oblong, the blade somewhat undulate, with irregularly toothed-spiny margins; dark green above, paler beneath
Flowers small, pinkish-white, in drooping raceme clusters; January through April
Fruit a round drupe; the outer covering is leathery, inner covering hard
 
Propagation:
seed
 
Usage:
primarily used for fruit production; as an ornamental, use as background mass for its shiny foliage - can be used as shade tree if headed high when young
 
Landscape Care:
Watering prefers frequent deep-soak irrigation - can tolerate some drought in mild climate coastal areas
Fertilizing 1-2 times annually when young; older trees require little feeding
Pruning select the best leader of young tree, stake, prune to shape desired (avoid shearing); can be headed back if needed
Pests/Diseases relatively free
Special Conditions/Other resistant to oak root fungus Queensland
 
Origin: Australia
Family: Proteaceae

Notes:
 
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