Mature size & growth rate

How big does Tartarian Sea Kale (Crambe tataria) get?

Also called Tartarian sea kale, Tartar bread plant, Steppe kale, Katran.

More about tartarian sea kale

About Tartarian Sea Kale

Crambe tataria · also called Tartarian sea kale, Tartar bread plant · edible

Crambe tataria (also written C. tatarica) is a deeply taprooted herbaceous perennial native to the dry steppes of central and eastern Europe, from Hungary eastward into Ukraine and central Asia. Unlike coastal sea kale (C. maritima), it grows inland on alkaline, well-drained steppe soils and produces fleshy, starch-rich roots that have been used as a radish and bread-flour substitute in Eastern European folk food traditions. It emerges early in spring, produces clouds of white flowers, then dies back completely by mid-summer. No toxicity is recorded; treat as mildly toxic in the absence of an ASPCA confirmed non-toxic listing.

Mature size: 70–100 cm tall in flower by 60–100 cm wide (28–40 in × 24–40 in)

Indoor size vs how big it gets in the wild

Tartarian Sea Kale stays fairly low but widens over time — it spreads into a bigger clump by offsets, runners or rhizomes rather than shooting upward. Indoors and in a pot, expect 70–100 cm tall in flower by 60–100 cm wide (28–40 in × 24–40 in). 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.

Size here is about width, not height: the plant builds an ever-wider clump or sends out plantlets and runners while staying relatively short.

Growth rate and years to mature

Tartarian Sea Kale is a fast grower. Realistically, expect two to four years from a young plant to a room-filling specimen in good light. Its feeding profile backs this up: little fertiliser is needed on average soils; an optional light balanced feed in spring is sufficient. avoid high-nitrogen inputs, which favour leafy top-growth at the expense of the edible root.

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

How to keep tartarian sea kale smaller

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

Divide the clump every year or two — splitting tartarian sea kale is the main way to control its spread and refresh it.
Remove runners, plantlets or offsets as they appear if you want it to stay a single tight clump.
Keep it slightly pot-bound; a snug pot naturally limits how wide the clump can get.

The keep-it-smaller method, step by step

Lift the whole plant. Slide tartarian sea kale out of its pot in spring when the clump has filled it.
Split the clump. Tease or cut the rootball into two or more sections, each with healthy roots and growth.
Repot one division. Put a single division back in the original pot to reset it to a smaller size; pot or give away the rest.
Remove offsets as they form. Through the year, detach new runners or pups to stop it spreading again.

How to grow tartarian sea kale bigger or faster

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

Give it a wider pot and let the clump fill it — width is exactly how this plant gets bigger.
Good light plus regular feeding maximises offset and runner production.
Leave plantlets and offsets attached and feed through the growing season for the fastest spread.

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

When tartarian sea kale outgrows the room (or the pot)

"Too big" usually arrives as one of these signs for tartarian sea kale:

The clump bulging over the pot rim or splitting the pot — the cue to divide, not to find a bigger room.
A dense centre that goes bare or tired while the edges keep spreading.
Runners or offsets escaping across the shelf or into neighbouring pots.

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

Tartarian Sea Kale size — frequently asked questions

How big does tartarian sea kale get?

Tartarian Sea Kale reaches 70–100 cm tall in flower by 60–100 cm wide (28–40 in × 24–40 in) when grown indoors. Size here is about width, not height: the plant builds an ever-wider clump or sends out plantlets and runners while staying relatively short.

Is tartarian sea kale slow or fast growing?

Tartarian Sea Kale is a fast grower. Expect two to four years from a young plant to a room-filling specimen in good light. Tartarian Sea Kale stays fairly low but widens over time — it spreads into a bigger clump by offsets, runners or rhizomes rather than shooting upward.

How long does tartarian sea kale take to reach full size?

Roughly two to four years from a young plant to a room-filling specimen in good light. Light, pot size and feeding move that timeline more than anything else.

How do I keep tartarian sea kale smaller?

Divide the clump every year or two — splitting tartarian sea kale is the main way to control its spread and refresh it. Remove runners, plantlets or offsets as they appear if you want it to stay a single tight clump. Keep it slightly pot-bound; a snug pot naturally limits how wide the clump can get.

How can I make tartarian sea kale grow bigger or faster?

Give it a wider pot and let the clump fill it — width is exactly how this plant gets bigger. Good light plus regular feeding maximises offset and runner production. Leave plantlets and offsets attached and feed through the growing season for the fastest spread.