Black Mulberry Seeds (Organic) 60 Seeds Upc 643451295757 Berry-like fruit with a unique tart-sweet taste. 60 Seeds The black mulberry is generally considered the best tasting of the various mulberry species Medium sized deciduous tree usually only to 20-30ft, but can reach 70ft. Trees are known to be very long lived and can bear fruit for several hundred years. Trees are fairly adaptable, but grow well in deep, moist soils. Fertilization is generally unnecessary. Grow in full sun Although they appear so, fruits are not true berries but an aggregate. Mildly drought tolerant, but water should be provided during long dry spells.