Repotting guide

When & how to repot Chalice Vine (Solandra grandiflora)

Also called Chalice Vine, Cup of Gold, Trumpet Plant.

More about chalice vine

About Chalice Vine

Solandra grandiflora · also called Chalice Vine, Cup of Gold · tropical

A vigorous tropical climber from the Caribbean and Central America, Solandra grandiflora produces enormous, fragrant, chalice-shaped creamy-yellow flowers that age to deep gold. It thrives in full sun with regular moisture and warmth, reaching impressive size on sturdy supports. Best suited to frost-free gardens or large conservatories.

Mature size: Up to 10–12 m (30–40 ft) long when grown outdoors in tropical climates; typically 3–5 m in containers or temperate conservatories.

Watch for — Failure to bloom: Most often caused by insufficient direct sun, excess nitrogen, or overly warm nights. Ensure at least 6 hours of full sun and apply a potassium-rich fertiliser in late spring. A brief cool period (down to 15°C) in winter can trigger flowering.

How to tell chalice vine needs repotting

Repotting on a calendar is less reliable than reading the plant. For chalice vine, 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 chalice vine 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 chalice vine

Every 2–3 years; top-dress in the in-between years. Chalice Vine's growth habit — woody, scrambling evergreen vine with thick stems and large glossy leaves; climbs via twining and leaning rather than true tendrils. — sets the pace. A vigorous tropical climber from the Caribbean and Central America, Solandra grandiflora produces enormous, fragrant, chalice-shaped creamy-yellow flowers that age to deep gold. It thrives in full sun with regular moisture and warmth, reaching impressive size on sturdy supports. Best suited to frost-free gardens or large conservatories.

What size pot to step chalice vine up to

Move up exactly one pot size. A heavy chalice vine 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 chalice vine

Early spring, just as new growth restarts, is the ideal window for chalice vine. 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 chalice vine

Consider top-dressing first. If chalice vine 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 rich, well-draining loam or sandy loam 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 chalice vine in the same spot and light — moving and repotting at once is what makes it drop leaves.

Aftercare

Leave chalice vine 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 chalice vine

Chalice Vine wants rich, well-draining loam or sandy loam. A fertile, moisture-retentive but free-draining mix is ideal. Amend heavy clay with grit or perlite. Container plants benefit from a quality potting compost blended with 20–30% coarse perlite. Always use fresh mix when you repot — reusing old, broken-down soil reintroduces the compaction and poor drainage you are repotting to fix.

Repotting chalice vine — frequently asked questions

How often should you repot chalice vine?

Every 2–3 years; top-dress in the in-between years for chalice vine. Fully repot chalice vine 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 rich, well-draining loam or sandy loam. It is heavy and hates being moved, and a vastly oversized pot holds water against the roots and rots them.

What size pot does chalice vine need?

When is the best time of year to repot chalice vine?

Should you top-dress or fully repot chalice vine?

For a big, heavy chalice vine, 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 chalice vine after repotting?

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