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Choy Sum Seeds

Malaysia's favourite stir-fry green, ready in about a month — easy in pots, troughs or hydroponics.

  • Full sun to light shade; shade from harsh afternoon sun helps
  • Sow about 0.5 cm deep, or start in a seedling tray
  • Germination: usually 3–5 days
  • First harvest: about 30–40 days after sowing
  • Suits pots, troughs and hydroponic setups

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Choy sum is grown in countless Malaysian home gardens, and for good reason: it is fast, forgiving and usually harvested before pests have time to settle in.

  1. Sow 2–3 seeds per cell in a seedling tray, about 0.5 cm deep, or sow directly in a trough.
  2. Keep the mix moist, and move the tray into bright light as soon as seeds sprout so seedlings don't stretch.
  3. Transplant or thin to about 15 cm apart when they have 3–4 true leaves.
  4. Harvest when the first flower buds appear on the main stem — that is when the stems are sweetest.

Tip: fine netting over the pot keeps flea beetles and caterpillars off the leaves without any spraying.

How to grow it

Vegetables · 30–40 days How to Grow Choy Sum (Sawi Hijau) at Home in Malaysia Grow choy sum from seed on a balcony or yard. Sowing, transplanting, watering, feeding, flea beetle and caterpillar control, and when to harvest.

What you need for this

Seedling Tray

Tray for raising strong seedlings in a small space before moving them to pots, polybags or beds.

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