From Chestnut Hill Tree Farm:

MULBERRIES: A very rapid growing deciduous small tree, mulberry fruits very early in the spring and is an excellent wildlife food source at a time of year when there is little ripe fruit available. There are three species: Black, White, and the native Red Mulberry. Selected cultivars have the best fruiting characteristics, with large black berries up to 2" long that taste like seedless blackberries! Mulberries are an important source of food for deer and game, and migrating birds such as Robins, Waxwings, and thrushes. Very easy to grow.

Black Mulberry – This variety was grown by Dr. Dunstan and is thought to have originated from the North American Fruit Exchange network. It produces very heavy crops large black berries up to 1.5" long that have a very rich sweet taste. Very prolific producer, first fruit on our farm to ripen in the spring. Absolutely loved by migrating birds! Rapid growing, maintenance free.

Height: 20-25’
Pollination: Self-pollinating
Bears: April
Light requirements: Full sun
Soil type: Well-drained pH 5.5-7.0
Pruning: Modified leader or multi-trunk
Maintenance: Easy
Hardiness Zone: 6-10