🌳 Black Beauty Mulberry

What it looks like

Why this variety

Black Beauty is the mulberry for small yards: a dwarf, compact tree — easily kept under 10 feet — with very large, sweet, black berries that taste like the best of the black mulberry family, rich and wine-like. Its small size is a practical gift: netting a Black Beauty against birds is a ten-minute job, picking needs no ladder, and a container-grown Black Beauty on a patio is a real fruit tree, not a novelty.

Black Beauty fruits on new growth, so a light winter prune to shape and to remove crossing wood both controls size and invites the next crop. Its compact habit also means it wants a little more attention to water in dry spells than a big, deep-rooted mulberry — mulch thick, water deeply, and the small tree will out-produce trees twice its size.

Florida note: Black Beauty is a North and Central Florida mulberry, happiest where winters give it a little chill and summers are not brutally long; in South Florida it is a trial plant, and in a container it can be moved to the coolest spot you have. Pick when fully dark and soft, and site it away from anything you don’t want stained.

For the species as a whole, see the Mulberry growing guide.

How to grow

Mulberry is the tree that forgives almost everything except a white car parked underneath it in fruit season. Plant in full sun in any reasonably drained soil — mulberries tolerate sand, clay, and neglect with equal cheer — and give the tree its mature width, because a mulberry kept small by constant hacking is a mulberry that spends its energy regrowing instead of fruiting. Water in deeply at planting, mulch thick, and then mostly stand back: young trees fruit within a year or two, and mature trees can rain fruit for months.

Prune in winter to keep the tree at picking height and to remove crossing wood; mulberries fruit on new growth, so a yearly shape-up both controls size and invites a fresh crop. If the tree is over a patio, path, or driveway, site it elsewhere now — the staining fruit is the tree’s one real design flaw, and no amount of pruning fixes a bad location. Birds love mulberries, which is both a pest note and a feature: plant one as a decoy tree and the birds may leave your other fruit alone.

Water & feeding

Water deeply while establishing, then back off — established mulberries are notably drought-tolerant, and steady, moderate water beats feast-or-famine. In sandy soil, a deep soak once a week in dry weather keeps fruit sizing well; overwatering in a rainy summer mostly just grows more leaves. Feed lightly: castings at planting and a modest spring feed are plenty, and excess nitrogen delays fruiting and grows soft wood that snaps in storms.

Common problems

• Birds — the main harvest competition; net small trees, or plant enough to share and pick daily.
• Fruit stain — site trees away from patios, cars, and light-colored paths; the fruit’s purple pigment is famously permanent.
• Popcorn disease (fungal) in humid weather — swollen, pale fruit that never ripens; remove affected fruit and space for airflow.
• Root-knot nematodes in sandy soil — mulch well and favor vigorous varieties that outgrow light pressure.

Harvest

Pick when the berry is fully dark, soft, and sweet — underripe mulberries are tart and a little green-tasting, and ripe ones fall at a touch, so spread a sheet under the tree and shake gently on a calm morning. Eat fresh, freeze for smoothies, or cook into jam and pies; mulberries freeze beautifully and keep their flavor better than most soft fruit. Pick daily in season, because ripe fruit on the ground ferments fast in Florida heat and attracts every insect in the neighborhood.

Saving seeds

Black Beauty is a named dwarf cultivar, so seed saved from it won’t come true — buy a nursery tree instead. The Saving seeds section of the Mulberry guide covers seed for the straight species.