Mature size & growth rate

How big does Soidao Wax Plant (Hoya soidaoensis) get?

Also called Soidao wax plant, Soidao hoya, Khao Soi Dao hoya.

More about soidao wax plant

About Soidao Wax Plant

Hoya soidaoensis · also called Soidao wax plant, Soidao hoya · houseplant

Hoya soidaoensis was formally described in 2013 as a new species from Khao Soi Dao, Chanthaburi Province, southeastern Thailand. It is a small climbing epiphyte with leathery, slightly rough leaves arranged oppositely on slender twining stems; its star-shaped flowers are brownish-red with a sweet fragrance and remain open day and night. Considered a collectors' plant best suited to experienced growers, the most important care point is providing high humidity alongside very free-draining media. It is non-toxic to cats and dogs.

Mature size: Up to 3 m as a vine indoors with a support; typically managed at 0.5–1.5 m as a potted specimen.

Indoor size vs how big it gets in the wild

Soidao Wax Plant 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 up to 3 m as a vine indoors with a support. In the ground with no restriction it is a completely different plant — typically managed at 0.5–1.5 m as a potted specimen. — 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

Soidao Wax Plant is a moderate grower. Realistically, expect three to six years to reach mature indoor size, gaining a steady amount each growing season. Its feeding profile backs this up: apply a dilute balanced liquid fertiliser (half strength) monthly from spring to late summer; withhold feeding during winter dormancy.

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

How to keep soidao wax plant smaller

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

Trim the longest vines back to the length you want — soidao wax plant 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.
A trim once or twice a season is usually enough to hold its length.

The keep-it-smaller method, step by step

Decide the length you want. Pick the point each vine of soidao wax plant 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 soidao wax plant bigger or faster

If you want it to fill the space sooner, push the conditions rather than hoping — for soidao wax plant 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 soidao wax plant light requirements page covers exactly how bright a spot it needs to grow at its potential instead of stalling.

When soidao wax plant outgrows the room (or the pot)

"Too big" usually arrives as one of these signs for soidao wax plant:

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 soidao wax plant repotting guide. If you want more of this plant instead of a bigger one, the soidao wax plant propagation guide turns prunings into new plants.

Soidao Wax Plant size — frequently asked questions

How big does soidao wax plant get?

Soidao Wax Plant reaches up to 3 m as a vine indoors with a support when grown indoors, and far larger where it grows unrestricted (typically managed at 0.5–1.5 m as a potted specimen.). 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 soidao wax plant slow or fast growing?

Soidao Wax Plant is a moderate grower. Expect three to six years to reach mature indoor size, gaining a steady amount each growing season. Soidao Wax Plant 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 soidao wax plant take to reach full size?

Roughly three to six years to reach mature indoor size, gaining a steady amount each growing season. Light, pot size and feeding move that timeline more than anything else.

How do I keep soidao wax plant smaller?

Trim the longest vines back to the length you want — soidao wax plant 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. A trim once or twice a season is usually enough to hold its length.

How can I make soidao wax plant 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.