Mature size & growth rate

How big does Tat Soi 'Yukina Savoy' (Brassica rapa var. narinosa 'Yukina Savoy') get?

Also called Yukina Savoy, savoy tatsoi, Japanese savoy mustard.

More about tat soi 'yukina savoy'

About Tat Soi 'Yukina Savoy'

Brassica rapa var. narinosa 'Yukina Savoy' · also called Yukina Savoy, savoy tatsoi · edible

'Yukina Savoy' is an upright, cold-hardy Asian green, a heat-tolerant tatsoi type with thick, blistered (savoyed) dark-green leaves on pale stems. Mild and slightly mustardy, it crops fast in cool weather, resists bolting better than flat tatsoi, and sweetens after light frost. Harvest as cut-and-come-again baby leaf or as full rosettes.

Mature size: 20-30 cm tall and 25-30 cm wide at full size; harvest baby leaf at 10-15 cm.

Indoor size vs how big it gets in the wild

Tat Soi 'Yukina Savoy' 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 20-30 cm tall and 25-30 cm wide at full size. In the ground with no restriction it is a completely different plant — harvest baby leaf at 10-15 cm. — which is why the pot, the light and the pruning matter so much for the size you actually end up with.

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

Tat Soi 'Yukina Savoy' 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: side-dress with a balanced or nitrogen-leaning fertiliser 2-3 weeks after sowing, or feed every 2-3 weeks with diluted liquid feed for cut-and-come-again harvests. avoid excess nitrogen, which can make leaves soft and aphid-prone.

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

How to keep tat soi 'yukina savoy' smaller

You are not stuck with the maximum size. For tat soi 'yukina savoy' specifically, these are the levers, in order of impact:

Choose a compact or dwarf variety of tat soi 'yukina savoy' 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 tat soi 'yukina savoy' bigger or faster

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

When tat soi 'yukina savoy' outgrows the room (or the pot)

"Too big" usually arrives as one of these signs for tat soi 'yukina savoy':

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 tat soi 'yukina savoy' repotting guide. If you want more of this plant instead of a bigger one, the tat soi 'yukina savoy' propagation guide turns prunings into new plants.

Tat Soi 'Yukina Savoy' size — frequently asked questions

How big does tat soi 'yukina savoy' get?

Tat Soi 'Yukina Savoy' reaches 20-30 cm tall and 25-30 cm wide at full size when grown indoors, and far larger where it grows unrestricted (harvest baby leaf at 10-15 cm.). 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 tat soi 'yukina savoy' slow or fast growing?

Tat Soi 'Yukina Savoy' is a fast grower. Expect a single growing season — it reaches full size in one year, then is done. Tat Soi 'Yukina Savoy' 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 tat soi 'yukina savoy' 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 tat soi 'yukina savoy' smaller?

Choose a compact or dwarf variety of tat soi 'yukina savoy' 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 tat soi 'yukina savoy' 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.