Mature size & growth rate

How big does Anise (Pimpinella anisum) get?

Also called Anise, Aniseed, Sweet Cumin.

More about anise

About Anise

Pimpinella anisum · also called Anise, Aniseed · herb

Anise is a slender annual herb in the carrot family, grown for its sweet, liquorice-flavoured seeds and feathery, aromatic foliage. It produces flat umbels of tiny white flowers that ripen to ribbed seeds used in baking, drinks and confectionery. A warm-season Mediterranean crop, it needs a long, sunny, frost-free season and light, well-drained soil to ripen seed.

Mature size: 45-60 cm tall, spreading 20-30 cm

Watch for — Poor germination: Seed can be slow and erratic; sow fresh seed in warm soil, keep evenly moist, and sow direct as anise resents transplanting its taproot.

Indoor size vs how big it gets in the wild

Anise 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 45-60 cm tall, spreading 20-30 cm. 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

Anise 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: a moderate feeder; enrich soil with compost before sowing and, on poor ground, apply a light balanced feed early in growth. avoid heavy nitrogen, which favours leafy growth and delays the seed ripening that anise is grown for.

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

How to keep anise smaller

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

Choose a compact or dwarf variety of anise 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 anise bigger or faster

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

When anise outgrows the room (or the pot)

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

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

Anise size — frequently asked questions

How big does anise get?

Anise reaches 45-60 cm tall, spreading 20-30 cm 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 anise slow or fast growing?

Anise is a moderate grower. Expect a single growing season — it reaches full size in one year, then is done. Anise 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 anise 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 anise smaller?

Choose a compact or dwarf variety of anise 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 anise 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.