Repotting guide

When & how to repot Weeping White Mulberry (Morus alba 'Pendula')

Also called Weeping White Mulberry, Weeping Mulberry.

More about weeping white mulberry

About Weeping White Mulberry

Morus alba 'Pendula' · also called Weeping White Mulberry, Weeping Mulberry · flowering

Weeping White Mulberry is a grafted ornamental form of Morus alba grown for its dramatically cascading branches rather than fruit production. It forms a compact, mushroom-shaped canopy ideal for small gardens and containers. Deciduous with attractive lobed foliage, it offers bold autumn colour and year-round architectural interest with minimal maintenance.

Mature size: 2–3 m tall × 2–3 m wide (6–10 ft), depending on graft height; slow-growing at 15–30 cm per year

Watch for — Graft union failure: As a grafted cultivar, the union between scion and rootstock can crack or fail, particularly in severe winters or if the tree is planted too deep. Plant the graft union 5–10 cm above soil level and protect with fleece in the first winter in colder zones.

How to tell weeping white mulberry needs repotting

Repotting on a calendar is less reliable than reading the plant. For weeping white mulberry, watch for these signs:

Thick roots out of the drainage holes, or circling the surface and lifting the plant.
The pot dries out unusually fast and weeping white mulberry wilts between waterings it used to shrug off.
The plant is visibly top-heavy and tips over easily.
Stalled growth and small new leaves over a full season — though with a big specimen, top-dressing is often the better first response before a full repot.

For the underlying biology of a pot-bound root system and why it stalls a plant, see our guide to spotting and fixing a root-bound plant.

How often to repot weeping white mulberry

Every 2–3 years; top-dress in the in-between years. Weeping White Mulberry's growth habit — deciduous small weeping tree, top-grafted onto an upright morus alba rootstock; branches cascade to the ground — sets the pace. Weeping White Mulberry is a grafted ornamental form of Morus alba grown for its dramatically cascading branches rather than fruit production. It forms a compact, mushroom-shaped canopy ideal for small gardens and containers. Deciduous with attractive lobed foliage, it offers bold autumn colour and year-round architectural interest with minimal maintenance.

What size pot to step weeping white mulberry up to

Move up exactly one pot size. A heavy weeping white mulberry dropped into a vastly bigger pot sits in a reservoir of wet soil its roots cannot reach, which rots them and destabilises the plant. In the years between repots, lift off and replace the top 3–5 cm of soil (top-dressing) instead — it refreshes nutrients without the shock of a full repot.

Not sure of the exact diameter? Our pot size calculator takes the current pot and root spread and tells you the right next size — it deliberately recommends a single step up, never a big jump.

The best time of year to repot weeping white mulberry

Early spring, just as new growth restarts, is the ideal window for weeping white mulberry. The plant is moving into its strongest growth phase and re-roots into fresh soil quickly. Avoid repotting in winter dormancy or, for flowering plants, while it is in bud or bloom — recovery is slowest then and you risk dropping the flowers.

Step-by-step: repotting weeping white mulberry

Consider top-dressing first. If weeping white mulberry is not badly root-bound, scrape off and replace the top 3–5 cm of soil instead — far less shock for a big plant that hates moving.
Get help and one size up. For a full repot, choose a pot just one size larger. A heavy plant needs two people and a stable, free-draining pot.
Ease it out on its side. Lay the plant down, slide the pot off, and gently loosen the outer roots. Do not bare-root a mature specimen.
Repot at the same depth. Add fresh well-drained loam to sandy loam; ph 5.5–7.0 beneath and around the rootball, keeping the original soil line. Firm it so the trunk is stable and upright.
Water and leave it put. Water thoroughly, then leave weeping white mulberry in the same spot and light — moving and repotting at once is what makes it drop leaves.

Aftercare

Leave weeping white mulberry in exactly the same spot and light it was in before — moving and repotting at the same time is what makes a big specimen drop leaves. Water it in well, then let the top of the soil dry before watering again so the larger volume of fresh soil does not stay sodden. Do not fertilise for about 4 weeks — fresh mix already carries nutrients and feeding freshly disturbed roots scorches them.

The right soil mix for weeping white mulberry

Weeping White Mulberry wants well-drained loam to sandy loam; ph 5.5–7.0. Adaptable to a wide range of soils including clay, loam, and sandy types, provided drainage is good. Tolerates slightly acidic to neutral pH. Avoid permanently waterlogged soils. Mulch the root zone to retain moisture and suppress weeds. Always use fresh mix when you repot — reusing old, broken-down soil reintroduces the compaction and poor drainage you are repotting to fix.

Repotting weeping white mulberry — frequently asked questions

How often should you repot weeping white mulberry?

Every 2–3 years; top-dress in the in-between years for weeping white mulberry. Fully repot weeping white mulberry only every 2–3 years; in the in-between years just top-dress the top 3–5 cm of soil. Step up one pot size in spring with well-drained loam to sandy loam; ph 5.5–7.0. It is heavy and hates being moved, and a vastly oversized pot holds water against the roots and rots them.

What size pot does weeping white mulberry need?

When is the best time of year to repot weeping white mulberry?

Should you top-dress or fully repot weeping white mulberry?

For a big, heavy weeping white mulberry, top-dressing — replacing the top 3–5 cm of soil — is the gentler option most years, with a full repot only every 2–3 years. A mature specimen sulks and drops leaves when fully repotted, so do it as rarely as the roots allow.

Should you fertilise weeping white mulberry after repotting?

Not immediately. Wait about 4 weeks after repotting weeping white mulberry. Fresh mix already contains nutrients, and feeding freshly cut or disturbed roots burns them. Resume your normal feeding routine once you see new growth.