Mature size & growth rate

How big does Korean Angelica (Angelica gigas) get?

Also called Korean Angelica, Giant Purple Angelica, Korean Masterwort.

More about korean angelica

About Korean Angelica

Angelica gigas · also called Korean Angelica, Giant Purple Angelica · flowering

Korean Angelica is a dramatic biennial or short-lived perennial prized for its deep burgundy-purple umbel flowers and bold, architectural foliage. It thrives in moist, humus-rich soil with partial shade and cool conditions. Plants self-seed freely, making them naturalise well in woodland gardens and damp borders.

Mature size: 1.5-2m tall (5-6.5ft), spread 60-90cm (24-36in)

Indoor size vs how big it gets in the wild

Korean Angelica reaches its full size within one growing season — there is no "long-term" size, just how big it gets before you harvest or it dies back. Indoors and in a pot, expect 1.5-2m tall (5-6.5ft), spread 60-90cm (24-36in). A pot, your light levels and a little pruning are what set the final size in a home, far more than the plant's theoretical potential.

It sizes up fast and once, racing from seedling to full size in a single season; after cropping it is finished, so size is a within-season question.

Growth rate and years to mature

Korean Angelica is a moderate grower. Realistically, expect a single growing season — it reaches full size in one year, then is done. Its feeding profile backs this up: apply a balanced slow-release fertiliser (10-10-10) in early spring. a further liquid feed of potassium-rich fertiliser when flower buds form encourages strong bloom. avoid excess nitrogen, which promotes leafy growth at the expense of flowers.

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

How to keep korean angelica smaller

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

Choose a compact or dwarf variety of korean angelica from the start — that is the most reliable size control for an annual.
Grow it in a smaller container to naturally limit how large it gets.
For some crops, pinching or pruning the growing tips keeps the plant shorter and bushier.
Sow a little later or space plants closer if you specifically want smaller individual plants.

How to grow korean angelica bigger or faster

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

Full sun, warm soil and steady water are what drive a crop to full size fastest.
Sow at the right time for your zone so it gets the whole season to size up.
Feed appropriately for the crop and never let it check (stall) from drought or cold.

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

When korean angelica outgrows the room (or the pot)

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

It sprawls beyond its bed or container before harvest — usually a spacing or support issue.
It flops or needs staking once it hits full height.
Once it has fruited or bolted, it is at its final size for good — the next plant is a new sowing.

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

Korean Angelica size — frequently asked questions

How big does korean angelica get?

Korean Angelica reaches 1.5-2m tall (5-6.5ft), spread 60-90cm (24-36in) when grown indoors. It sizes up fast and once, racing from seedling to full size in a single season; after cropping it is finished, so size is a within-season question.

Is korean angelica slow or fast growing?

Korean Angelica is a moderate grower. Expect a single growing season — it reaches full size in one year, then is done. Korean Angelica reaches its full size within one growing season — there is no "long-term" size, just how big it gets before you harvest or it dies back.

How long does korean angelica take to reach full size?

Roughly a single growing season — it reaches full size in one year, then is done. Light, pot size and feeding move that timeline more than anything else.

How do I keep korean angelica smaller?

Choose a compact or dwarf variety of korean angelica from the start — that is the most reliable size control for an annual. Grow it in a smaller container to naturally limit how large it gets. For some crops, pinching or pruning the growing tips keeps the plant shorter and bushier. Sow a little later or space plants closer if you specifically want smaller individual plants.

How can I make korean angelica grow bigger or faster?

Full sun, warm soil and steady water are what drive a crop to full size fastest. Sow at the right time for your zone so it gets the whole season to size up. Feed appropriately for the crop and never let it check (stall) from drought or cold.