Mustard greens
Brassica juncea
Also called Brown mustard and Indian mustard
Garden plant · Herbs, veg & fruitTHE HEAT COMES FROM STRESS. Grown fast in cool damp weather it is a mild salad leaf; checked by drought or heat it turns fierce enough to hurt.
Care at a glance
- Ease
- Easy
- Water
- Every 3 daysWater the ground — water at the base, in the morning, not over the leaves.
- Light
- Partial shade in summer, full sun in autumn
- Feed
- Every 21 days
- Humidity
- Average
- Hardiness
- Hardy — an average winter RHS H4, to -10°C
- Size
- 0.5 m tall · 0.3 m across
- Lifecycle
- Annual
- Origin
- Asia
Is it safe for pets and people?
PetsToxic to pets
Affects horses. Signs: stomach and gut irritation, with belly pain (colic).
PeopleIrritates skin
HandlingTake care handling it
RHS category C — a skin irritant and allergen.
Checked against ASPCA and RHS on 2026-08-04.
A guide, not veterinary or medical advice. If a pet or a person has eaten a plant and you are worried, call your vet or doctor now — don’t wait for signs to appear. Spotted a mistake? Tell us.