Mature size & growth rate

How big does Hoya Krimson Princess (Hoya carnosa 'Krimson Princess') get?

Also called Krimson Princess wax plant, Hoya carnosa 'Rubra', variegated wax plant, porcelain flower.

More about hoya krimson princess

About Hoya Krimson Princess

Hoya carnosa 'Krimson Princess' · also called Krimson Princess wax plant, Hoya carnosa 'Rubra' · houseplant

Hoya Krimson Princess is a trailing wax-plant cultivar prized for waxy leaves with creamy-pink inner variegation and clusters of fragrant, star-shaped flowers. Give it bright indirect light, let the soil dry almost fully between waterings, and warmth above 10C. The ASPCA lists Hoya carnosa as non-toxic to cats and dogs.

Mature size: Trailing or climbing stems reach 90-120 cm (3-4 ft) or more indoors with support; a slow grower that takes a few years to reach full size.

Indoor size vs how big it gets in the wild

Hoya Krimson Princess 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 trailing or climbing stems reach 90-120 cm (3-4 ft) or more indoors with support. In the ground with no restriction it is a completely different plant — a slow grower that takes a few years to reach full size. — 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

Hoya Krimson Princess is a slow grower. Realistically, expect many years — it gains very little each season, so it can hold the same shelf-sized footprint for 5-10+ years. Its feeding profile backs this up: feed monthly during spring and summer with a balanced, diluted (half-strength) liquid houseplant fertiliser. a higher-phosphorus bloom feed can encourage flowering. stop feeding in autumn and winter when growth slows.

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

How to keep hoya krimson princess smaller

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

Trim the longest vines back to the length you want — hoya krimson princess 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 hoya krimson princess 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 hoya krimson princess bigger or faster

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

When hoya krimson princess outgrows the room (or the pot)

"Too big" usually arrives as one of these signs for hoya krimson princess:

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

Hoya Krimson Princess size — frequently asked questions

How big does hoya krimson princess get?

Hoya Krimson Princess reaches trailing or climbing stems reach 90-120 cm (3-4 ft) or more indoors with support when grown indoors, and far larger where it grows unrestricted (a slow grower that takes a few years to reach full size.). 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 hoya krimson princess slow or fast growing?

Hoya Krimson Princess is a slow grower. Expect many years — it gains very little each season, so it can hold the same shelf-sized footprint for 5-10+ years. Hoya Krimson Princess 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 hoya krimson princess take to reach full size?

Roughly many years — it gains very little each season, so it can hold the same shelf-sized footprint for 5-10+ years. Light, pot size and feeding move that timeline more than anything else.

How do I keep hoya krimson princess smaller?

Trim the longest vines back to the length you want — hoya krimson princess 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 hoya krimson princess 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.