Mature size & growth rate

How big does Cinnamon Basil (Ocimum basilicum 'Cinnamon') get?

Also called Mexican Spice Basil.

More about cinnamon basil

About Cinnamon Basil

Ocimum basilicum 'Cinnamon' · also called Mexican Spice Basil · herb

Cinnamon basil is a sweet-basil cultivar with a warm, spicy cinnamon aroma from methyl cinnamate, plus handsome purple-tinged stems and pink flowers that attract pollinators. It is ornamental and culinary, used in teas, baking and Mexican cooking. Grow as a tender warm-season annual in full sun, pinching to keep it leafy and bushy.

Mature size: 45-75 cm tall and 30-45 cm wide

Watch for — Aphids and whitefly: Sap-suckers cluster on new growth; rinse off with water or use insecticidal soap, and encourage natural predators.

Indoor size vs how big it gets in the wild

Cinnamon Basil 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 45-75 cm tall and 30-45 cm wide. 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

Cinnamon Basil is a fast grower. Realistically, expect a single growing season — it reaches full size in one year, then is done. Its feeding profile backs this up: feed every 3-4 weeks with a balanced liquid fertiliser at half strength during active growth. moderate feeding keeps the cinnamon aroma strong; excess nitrogen dilutes flavour.

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

How to keep cinnamon basil smaller

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

Choose a compact or dwarf variety of cinnamon basil 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 cinnamon basil bigger or faster

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

When cinnamon basil outgrows the room (or the pot)

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

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

Cinnamon Basil size — frequently asked questions

How big does cinnamon basil get?

Cinnamon Basil reaches 45-75 cm tall and 30-45 cm wide 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 cinnamon basil slow or fast growing?

Cinnamon Basil is a fast grower. Expect a single growing season — it reaches full size in one year, then is done. Cinnamon Basil 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 cinnamon basil 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 cinnamon basil smaller?

Choose a compact or dwarf variety of cinnamon basil 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 cinnamon basil 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.