Repotting guide

When & how to repot Willow-leaf Fig (Ficus salicaria)

Also called Willow-leaf Fig Bonsai, Narrowleaf Fig.

More about willow-leaf fig

About Willow-leaf Fig

Ficus salicaria · also called Willow-leaf Fig Bonsai, Narrowleaf Fig · houseplant

Willow-leaf fig is a tropical Ficus grown as one of the most forgiving indoor bonsai, named for its slender, willow-like leaves. It develops aerial roots and a thick trunk quickly, back-buds readily, and tolerates lower light and irregular care better than most species, making it a popular beginner-friendly indoor bonsai.

Mature size: As bonsai typically 20-60 cm; the parent species can become a large tree. Its small leaves reduce well, suiting shohin through medium bonsai.

How to tell willow-leaf fig needs repotting

Repotting on a calendar is less reliable than reading the plant. For willow-leaf fig, 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 willow-leaf fig 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 willow-leaf fig

Every 2–3 years; top-dress in the in-between years. Willow-leaf Fig's growth habit — vigorous tropical fig with narrow, lance-shaped leaves, fast back-budding, and a strong tendency to thicken trunk and produce aerial roots. excellent for banyan, informal upright, and root-over-rock styles. bleeds milky latex when cut. — sets the pace. Willow-leaf fig is a tropical Ficus grown as one of the most forgiving indoor bonsai, named for its slender, willow-like leaves. It develops aerial roots and a thick trunk quickly, back-buds readily, and tolerates lower light and irregular care better than most species, making it a popular beginner-friendly indoor bonsai.

What size pot to step willow-leaf fig up to

Move up exactly one pot size. A heavy willow-leaf fig 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 willow-leaf fig

Early spring, just as new growth restarts, is the ideal window for willow-leaf fig. 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 willow-leaf fig

Consider top-dressing first. If willow-leaf fig 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 free-draining bonsai mix 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 willow-leaf fig in the same spot and light — moving and repotting at once is what makes it drop leaves.

Aftercare

Leave willow-leaf fig 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 willow-leaf fig

Willow-leaf Fig wants free-draining bonsai mix. Use an open, well-draining substrate such as akadama with pumice and lava, or a bonsai mix with some organic matter for moisture retention. Repot every 1-2 years in spring; vigorous roots fill the pot quickly. Always use fresh mix when you repot — reusing old, broken-down soil reintroduces the compaction and poor drainage you are repotting to fix.

Repotting willow-leaf fig — frequently asked questions

How often should you repot willow-leaf fig?

Every 2–3 years; top-dress in the in-between years for willow-leaf fig. Fully repot willow-leaf fig 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 free-draining bonsai mix. It is heavy and hates being moved, and a vastly oversized pot holds water against the roots and rots them.

What size pot does willow-leaf fig need?

When is the best time of year to repot willow-leaf fig?

Should you top-dress or fully repot willow-leaf fig?

For a big, heavy willow-leaf fig, 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 willow-leaf fig after repotting?

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