secondary
Mulberry — black (shahtoot)
shahtoot siyaah (شہتوت سیاہ)[unverified]
Morus nigra
- punjab plains
- kpk hills
- pothohar
International hardiness
- USDA 6-9
- RHS H5
- AU: Warm temperate, Cool temperate, Mediterranean, Subtropical
Black mulberry (Morus nigra), known across South Asia as shahtoot, is a long-lived deciduous fruit tree from southwestern Asia, prized for its intensely flavored, deep-purple berries.13 Its exact wild origin is obscured by millennia of cultivation, but it is commonly thought to be native to the region bordering the southern Caspian Sea — modern Iran, Azerbaijan, and Turkmenistan — likely part of the temperate deciduous forest there.3 From that homeland it has spread and naturalized from the eastern Mediterranean across much of Europe and into western and central Asia.13 For a homesteader, the appeal is straightforward: a sturdy, picturesque shade tree that ripens a few intense weeks of premium dessert fruit on a relatively compact frame, and one that fits comfortably into a temperate orchard or food forest.13
How to identify it
Black mulberry is a deciduous tree that typically grows to about 12 m tall and up to 15 m wide, often with a broad, low, spreading crown that is frequently wider than it is tall.123 The trunk is often short, and the main trunk and large branches are deeply fissured, gnarled, and covered with many burrs, especially in older trees, which often lean into an irregular, characterful form.23 The bark is grey to dark brown and deeply fissured, and the dark, pointed, brown-black buds are arranged alternately, opening late in spring.2 The branch ends carry many thin, flexible twigs, giving the tree a gnarly, somewhat zigzag growth with short internodes.2
The leaves are generally heart-shaped (cordate at the base), coarse in texture, and usually toothed along the margins, measuring roughly 8 to 20 cm long (up to about 23 cm on vigorous shoots).12 The upper surface is rough and often semi-glossy while the underside is downy; lobed leaves can appear on lower or vigorous shoots, but on M. nigra lobing is relatively rare, and several leaf forms may show on a single tree.12 The small green, spike-like catkin flowers appear late, after the leaves; the tree may bear male and female flowers together (monoecious) or on separate trees (dioecious).2 The “berry” is in fact a compound fruit of many drupelets, resembling a large blackberry or loganberry, about 2.5 cm (1 inch) across, ripening from green through pink to dark purple or almost black.12
A reliable way to separate black mulberry from white mulberry (M. alba) is the fruit stalk: in M. nigra the peduncle is extremely short, almost embedded in the fruit.4 Compared with white mulberry, black mulberry also has rougher, thicker, less-often-lobed leaves and darker, rougher, burr-covered bark.23 Horticultural sources note that most of the old fruiting mulberry trees of western Europe are M. nigra grown for the table, whereas M. alba was more often planted for silkworm leaves.23
Growing black mulberry
Black mulberry is well suited to temperate climates with warm summers, and it is grown across Mediterranean regions, the Caucasus, and temperate Europe.13 The Royal Horticultural Society rates it as hardiness H5, meaning it tolerates cold down to about −15 °C — roughly equivalent to USDA zone 6, and sometimes into zone 5 in sheltered sites.3 One of its most useful homestead traits is that it leafs out and flowers late, after the worst of spring, which helps it avoid damage from late frosts in many climates.23
The general botanical sources collected here describe the tree’s habit, hardiness, and identification in detail but do not give consistent figures for propagation method, planting spacing, soil pH, irrigation rates, or time to first fruit. Rather than invent precise numbers, those details are intentionally left out. In practice, treat it as the long-lived temperate orchard tree it is: give it a sunny, open position with room to spread its broad crown, and plan around a tree that grows slowly and lives for a very long time.23
Harvest and uses
The harvest is the deep-purple-to-black compound fruit, picked when it has ripened fully from green through pink to its final dark colour.12 Ripe black mulberries are very juicy, sweet-acid, and strongly flavoured, and they stain hands and clothing readily — a practical thing to plan for at picking time.2 The fruit is the tree’s primary product and is the reason most fruiting mulberries in cultivation are this species rather than white mulberry.23 The young leaves are also described as edible, though the milky sap and unripe fruit are not (see the cautions below).1
Beyond the fruit, the tree earns its place as a substantial, characterful shade tree, often becoming a long-lived landscape feature with its broad crown and gnarled, burred trunk.23 The general sources here do not document specific per-tree yield figures, drying or processing rates, or commercial returns, so those are not stated.
Safety and cautions
While the ripe fruit and young leaves are edible, the sources are clear that not every part of black mulberry is safe to eat: the unripe fruit, milky sap, and other parts of the plant can cause toxicity or irritation.1 Pick only fully ripe, dark berries for eating, and avoid the white sap and green, underripe fruit.1 Black mulberry also has a long history of traditional medicinal use tied to the compounds in its richly coloured fruit, but a history of traditional use is not the same as a proven treatment; this profile makes no medical claims and recommends no doses.1 As with any plant used medicinally, anyone considering it for that purpose should seek qualified guidance first.