Mulberry Tree: Which to Plant, and the Staining Problem

Mulberries crop heavily within a few years and stain everything under them. Choosing a species, siting it away from paths, and the fruitless myth.

By Zakaria September 18, 2026 5 min read Save to Pinterest

Mulberries on the branch at four stages of ripening, from pale green through red to near-black — Photo: Wouter Hagens, CC BY-SA 3.0, via Wikimedia Commons

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Mulberries are among the fastest trees to reward you with fruit — and among the messiest things you can plant near a patio. Both facts matter equally when choosing where to put one.

The short answer

There are three mulberry species worth knowing. Black mulberry, Morus nigra, has the best flavour, suits zone 7 and warmer, and is slow to crop but very long-lived. Red mulberry, Morus rubra, is the North American native, hardy to about zone 4. White mulberry, Morus alba, crops fastest and is hardiest but is invasive across much of the US and hybridises with the native red. Mature trees reach 25 to 50 feet with shallow, wide, vigorous roots that should be kept 20 to 30 feet from drains and paving. The fruit stains heavily, so site the tree over grass and away from paths, patios and parking.

Three species, and the cheap one is usually the invasive one
Black for flavour, red for natives, white to avoid in the US
Fruits young — white in 2–3 years, black in 5–8
Stains everything. Site it over grass, away from paving
Shallow wide roots — 20–30 ft from drains and foundations

The three species

Choosing a mulberry

	Black (M. nigra)	Red (M. rubra)	White (M. alba)
Flavour	The best — rich, tart, complex	Good, sweet	Mild, often insipid
Hardiness	Zone 7+	Zone 4+	Zone 4+
Origin	Southwest Asia	North America, native	China
Years to fruit	5–8	3–5	2–3
Mature size	20–30 ft	35–50 ft	30–50 ft
Lifespan	Centuries	~100 years	Shorter
Invasive in US?	No	Native	Yes, widely

White mulberry is the one sold cheaply and the one to avoid

Morus alba was introduced to North America for silkworm cultivation and has naturalised aggressively across much of the continent. It also hybridises with the native red mulberry, which is a genuine conservation problem — M. rubra is in decline partly for this reason, and is listed as threatened or endangered in several states and in Canada.

It is fast, hardy, cheap and widely stocked, which is exactly why it keeps getting planted. Check what you are buying, and check your state’s invasive species list before ordering.

Siting: this is the whole decision

Plan for the mess before the harvest. A mature mulberry drops a heavy crop over several weeks, and the fruit stains paving, decking, cars, garden furniture and clothing a deep purple that does not fully come out.

Then the birds arrive — and bird droppings carry the same stain over a far wider area than the canopy.

Distances worth keeping

From	Distance
Paths, patios, decking	As far as you can manage — this is the big one
Driveways and parking	30 ft+
Washing lines	Not downwind, at any distance
Foundations, drains, septic	20–30 ft — roots are shallow, wide and vigorous
Swimming pools	Well clear, and not upwind
Neighbour boundaries	Consider where the birds will sit

Over grass or a wild area is ideal. Fallen fruit disappears into turf, feeds wildlife, and mows away.

Growing one

Sun: full sun for fruit. It will grow in part shade and crop poorly
Soil: tolerant, but wants good drainage. Not waterlogged ground
Water: regularly for the first two years, then it largely fends for itself
Feeding: rarely needed. A heavy nitrogen feed gives growth instead of fruit
Pollination: most are self-fertile, so a single tree crops
Pruning: in winter, while fully dormant. Mulberries bleed sap heavily if cut in spring or summer. Keep cuts small — large wounds heal badly on this species
Hardiness: black needs zone 7; red and white take zone 4

They tolerate hard pruning, which is why mulberries are often kept as a pollarded head or a compact bush rather than allowed to reach 40 feet. If space is limited, that is a genuine option rather than a compromise — and it keeps the fruit within reach.

Harvesting

Late spring into midsummer, over a long ragged season rather than one flush
The fruit does not ripen after picking, so it has to come off the tree ready
Ripe fruit falls at a touch. The standard method is a sheet or tarpaulin spread underneath, then shake a branch
Fresh mulberries keep a day or two at most — this is a fruit almost nobody buys in shops for exactly that reason
Most of a crop ends up frozen, cooked, or made into jam

Wear what you do not mind ruining

Mulberry juice on skin fades in a few days; on clothing it is usually permanent. Gloves, old clothes, and do not pick in anything you like.

The fruitless question

Fruitless cultivars of white mulberry exist and are genuinely fruitless. They are widely planted as street and car park shade trees.

Two things to know before choosing one:

They are still Morus alba, so the invasiveness concern does not go away in regions where that matters.
The pollen. Fruitless mulberries are male clones producing large quantities of wind-borne pollen, and they are a significant allergen — several cities in the American southwest have banned planting them on those grounds.

If the goal is a fast shade tree without fruit, it is worth asking what else grows locally before defaulting to this one.

What it is genuinely good for

Fruit within a few years, which few trees manage
Very heavy crops once established
Excellent wildlife value — birds strip a tree, and the leaves feed silkworms and native moths
Fast shade
Drought tolerance once the roots are down
Longevity, in the case of black mulberry — these are trees that outlive the people who plant them

It is a good tree. It is just one that decides, for the next fifty years, what the ground underneath it can be used for.

Common questions

What kind of mulberry tree should I plant?

Black mulberry, Morus nigra, for flavour if you are in zone 7 or warmer — it is the best-tasting of the three and the slowest to crop. Red mulberry, Morus rubra, is the North American native, hardy to about zone 4, and a better choice for wildlife value. White mulberry, Morus alba, crops fastest and is the hardiest but is invasive across much of the United States and hybridises with the native red, so it is the one to avoid despite being the one most often sold cheaply.

Are mulberry trees messy?

Very, and this is the thing to plan around rather than discover. A mature tree drops a heavy crop over several weeks, the fruit stains paving, decking, cars and clothing a deep purple that does not fully wash out, and birds spread the same stain across a wide area in their droppings. None of that is a reason not to grow one — it is a reason to site it over grass or a wild area, well away from paths, patios, driveways and washing lines.

How fast does a mulberry tree grow?

Fast. White mulberry can add several feet a year and fruit within two to three years; red mulberry is moderately quick; black mulberry is the slow one, often taking five to eight years to crop properly but living for centuries. Most mulberries reach 25 to 50 feet given room, though they tolerate hard pruning well and are often kept much smaller deliberately.

Is there a fruitless mulberry tree?

Yes — fruitless cultivars of white mulberry are sold specifically as shade trees for streets and car parks, and they genuinely do not fruit. Two cautions: they are still white mulberry, so they still carry the invasiveness problem in much of the US, and they produce large amounts of wind-borne pollen that is a significant allergen, to the point that some cities have banned planting them.

Do mulberry trees have invasive roots?

The roots are shallow, wide-spreading and vigorous, and they will find drains, lift paving and compete hard with anything planted beneath them. Keep a mature tree at least 20 to 30 feet from foundations, drains, septic fields and paved areas. This matters more than the height does, because the root spread typically exceeds the canopy.

When do mulberries ripen and how do you harvest them?

Late spring into midsummer depending on species and climate, over a long ragged season rather than all at once, and the fruit does not ripen after picking. Ripe mulberries fall at a touch, so the standard method is to spread a sheet or tarpaulin under the tree and shake a branch. Fresh fruit keeps only a day or two, which is why most of a crop ends up frozen, cooked or made into jam.

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