Mature size & growth rate

How big does Crossvine (Bignonia capreolata) get?

Also called Crossvine, Trumpet Flower, Quarantine Vine.

More about crossvine

About Crossvine

Bignonia capreolata · also called Crossvine, Trumpet Flower · flowering

Crossvine is a native North American woody vine with tendril-like clinging holdfasts, producing striking reddish-orange and yellow tubular flowers beloved by hummingbirds in spring. Semi-evergreen and adaptable, it tolerates a wide range of soils and is hardy across much of the South and Midwest. Excellent on fences, walls, and pergolas.

Mature size: 9–15 m (30–50 ft) long; can be pruned and kept much smaller. Stems can reach 5 cm in diameter on mature specimens.

Watch for — Invasive spread: Crossvine spreads by root suckers and can become difficult to contain in fertile soils. Install root barriers, remove suckers promptly, and prune annually to maintain boundaries. Not considered invasive in its native range but can be vigorous in enriched garden beds.

Indoor size vs how big it gets in the wild

Crossvine does not get tall — it gets long. Size here is about stem length and how you train or cut it, not how much floor it claims. Indoors and in a pot, expect 9–15 m (30–50 ft) long. In the ground with no restriction it is a completely different plant — can be pruned and kept much smaller. stems can reach 5 cm in diameter on mature specimens. — which is why the pot, the light and the pruning matter so much for the size you actually end up with.

Growth shows up as lengthening stems that trail down or climb up a support; the plant can be kept tiny or grown metres long from the exact same root system.

Growth rate and years to mature

Crossvine is a fast grower. Realistically, expect one to three growing seasons — fast vines can add a metre or more of stem in a single good summer. Its feeding profile backs this up: generally requires little supplemental feeding in garden soils. if growth is poor, apply a balanced slow-release fertiliser in early spring. avoid excess nitrogen, which promotes foliage at the expense of flowers.

Want this turned into the right next pot at the right moment? The pot size calculator and the crossvine repotting guide cover when and how much to size up — pot size is one of the biggest levers on how fast crossvine grows.

How to keep crossvine smaller

You are not stuck with the maximum size. For crossvine specifically, these are the levers, in order of impact:

Trim the longest vines back to the length you want — crossvine takes hard cutting well and bushes out from the cut.
Cut just above a leaf node; each trimmed stem usually branches into two, so pruning makes it fuller, not sparser.
The cuttings root easily in water or mix, so "keeping it smaller" doubles as free new plants.
Expect to tidy it every few weeks in summer — this is a fast vine that will sprawl if left.

The keep-it-smaller method, step by step

Decide the length you want. Pick the point each vine of crossvine should stop — you can be aggressive; it regrows readily.
Cut just above a node. Snip about 0.5 cm above a leaf node so the stem branches there instead of dying back.
Root the cuttings. Drop the trimmed pieces in water or mix — they root in 2-4 weeks and can fill the same pot for a bushier look.
Repeat as it runs. Re-trim whenever it overshoots; regular light pruning keeps it both smaller and fuller.

How to grow crossvine bigger or faster

If you want it to fill the space sooner, push the conditions rather than hoping — for crossvine the accelerators are:

Good light plus a moss pole or trellis triggers the longest, fastest, largest-leaved growth.
Give it something to climb — many vines grow far faster and bigger up a support than trailing.
Feed through spring and summer and keep it consistently watered while it is actively running.

Light is almost always the ceiling. The crossvine light requirements page covers exactly how bright a spot it needs to grow at its potential instead of stalling.

When crossvine outgrows the room (or the pot)

"Too big" usually arrives as one of these signs for crossvine:

Vines pooling on the floor or wrapping past where you want them — purely a trimming cue, not a repot one.
Bare, leggy stems with leaves only at the tips (usually a light problem, not a size one).
A tangled mass that has outrun its support and needs cutting back and re-training.

If it is the pot rather than the room, it is a repotting job, not a goodbye — see the crossvine repotting guide. If you want more of this plant instead of a bigger one, the crossvine propagation guide turns prunings into new plants.

Crossvine size — frequently asked questions

How big does crossvine get?

Crossvine reaches 9–15 m (30–50 ft) long when grown indoors, and far larger where it grows unrestricted (can be pruned and kept much smaller. stems can reach 5 cm in diameter on mature specimens.). Growth shows up as lengthening stems that trail down or climb up a support; the plant can be kept tiny or grown metres long from the exact same root system.

Is crossvine slow or fast growing?

Crossvine is a fast grower. Expect one to three growing seasons — fast vines can add a metre or more of stem in a single good summer. Crossvine does not get tall — it gets long. Size here is about stem length and how you train or cut it, not how much floor it claims.

How long does crossvine take to reach full size?

Roughly one to three growing seasons — fast vines can add a metre or more of stem in a single good summer. Light, pot size and feeding move that timeline more than anything else.

How do I keep crossvine smaller?

Trim the longest vines back to the length you want — crossvine takes hard cutting well and bushes out from the cut. Cut just above a leaf node; each trimmed stem usually branches into two, so pruning makes it fuller, not sparser. The cuttings root easily in water or mix, so "keeping it smaller" doubles as free new plants. Expect to tidy it every few weeks in summer — this is a fast vine that will sprawl if left.

How can I make crossvine grow bigger or faster?

Good light plus a moss pole or trellis triggers the longest, fastest, largest-leaved growth. Give it something to climb — many vines grow far faster and bigger up a support than trailing. Feed through spring and summer and keep it consistently watered while it is actively running.