leafy green
EdibleTatsoi
Brassica rapa subsp. narinosa
Considered non-toxic to cats and dogs (source: ASPCA (not listed; brassica)).
Some direct sun — an east or west window, or a few hours of direct light.
Keep evenly moist — water when the top inch of soil is dry.
Forgiving and beginner-friendly.
Tatsoi is a quick-growing Asian green forming a low rosette of dark, spoon-shaped leaves with a mild mustardy flavor. It thrives in cool conditions and is one of the faster greens to harvest indoors.
About Tatsoi
Tatsoi (Brassica rapa subsp. narinosa) is a quick-growing Asian green from East Asia that forms a low rosette of dark, spoon-shaped leaves with a mild mustardy bite. It is one of the faster greens to reach the plate indoors and stays compact, so several plants spaced across a 4-litre pot give a useful patch on a windowsill that gets medium light.
Like most Asian greens it prefers cool conditions. You can harvest the outer leaves as a cut-and-come-again crop or cut the whole young rosette at once. Thin the seedlings so each plant has room to spread into its flat shape. Keep it cool, because heat brings on bolting and a sharper flavour. It takes medium light and moderate water, and baby leaves are ready in as little as 30 days, with full rosettes by around 50.
What it’s like to grow
An easy, fast green that's friendly to beginners. The main thing that derails it is warmth: in hot rooms or long days it bolts to flower and the flavour turns harsher. Small shotholes peppering the leaves are flea beetles, most likely if it sees outdoor air. It is happy in medium light with moderate water, so it doesn't need a blazing window. A good choice for someone with a cool spot who wants a quick salad green, and it is non-toxic to cats and dogs.
What to expect
First harvest in about 30–50 days. It’s forgiving, so it’s a good one to learn on. No sunny window? It also does fine under a clip-on grow light.
See what you’ll need to get started ↓Companions
Tips
- Harvest outer leaves as cut-and-come-again, or cut the whole rosette young.
- Keep it cool; heat triggers bolting and a sharper flavor.
- Thin seedlings so each rosette has room to spread.
Common problems
- Bolting to flower in warm conditions or long days.
- Flea beetles pepper the leaves with small holes.
Common questions
Is Tatsoi toxic to cats and dogs?
Tatsoi is non-toxic to cats and dogs, which makes it a safe pick if you have pets. Source: ASPCA (not listed; brassica).
How much light does Tatsoi need?
Tatsoi does best in medium, indirect light: near an east or west window, or a little back from a bright one. Direct midday sun can scorch it.
How often should I water Tatsoi?
Water Tatsoi when the top inch of soil feels dry, then let it drain. Aim for evenly moist, not soggy.
What temperature does Tatsoi need?
Tatsoi is happiest around 10–21 °C. It tolerates brief dips to about -5 °C, but cold drafts and sudden chills set it back.
How long does Tatsoi take to grow?
Expect a first harvest about 30–50 days from sowing under good conditions. A fast cool-season green that forms a low rosette of spoon-shaped leaves; cut-and-come-again for several harvests.
Can I grow Tatsoi without a sunny window?
Yes. Tatsoi does well under an affordable clip-on grow light, so a bright window isn't essential.
How big does Tatsoi get?
A flat spoon-leaved rosette ~0.1–0.2 m tall; space several across a pot.
How do I propagate Tatsoi?
Sow seed directly and thin the seedlings; succession-sow for a steady cut-and-come-again supply.
What pests affect Tatsoi?
Watch for flea beetles, aphids, slugs and cabbage loopers. Check new growth and the undersides of leaves often, and treat early with a rinse or insecticidal soap before they spread.
Is Tatsoi easy to grow?
Yes. Tatsoi is forgiving and one of the better plants to learn on.
Gear for Tatsoi
Gear suggestions to get you started — general picks, not paid placements.
Pet-toxicity from the ASPCA. Care details are general guidance, not professional or veterinary advice; only eat plants you can positively identify as the edible plant and part described. Photo: Idéalités, CC BY-SA 4.0, via Wikimedia Commons (CC-BY-SA). Care info last updated 2026-06-02.