The red mulberry is a native of the Eastern United States. White and black mulberry trees were introduced from Europe and Asia and have hybridised with the red mulberry. Sometimes considered weed trees, mulberry trees can be attractive landscape trees that provide a tasty fruit.
The white mulberry is a cold-hardy tree withstanding temperatures as low as -31.6 degrees Celsius. It fruits in late spring to early summer. The ripe fruit is usually white with tiny black speckles, although some trees bear a deep red fruit that is almost black.
The black mulberry is less cold-tolerant than either red or white mulberry and is restricted to USDA Hardiness Zone 7 and warmer areas. The fruits ripen in mid- to late summer. Ripe fruits are black, deep lavender or deep red in colour.
Red mulberry trees are cold-hardy as far north as USDA zone 4, withstanding temperatures as low as -34.4 degrees Celsius. The fruits ripen in mid- to late spring to a deep red or black colour.
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