Lemongrass care guide
Cymbopogon citratus
Also known as: West Indian lemongrass
Pets and children
Caution advised
Contains essential oils reported to cause vomiting or diarrhea in dogs and cats, and the sharp leaf edges can cut the mouth; keep it out of reach and consult a veterinarian (or a doctor, for a child) if eaten.
How often to water Lemongrass
- Spring–Summer (Mar–Sep)
- Every 2 days
- A thirsty grass: in growth, water thoroughly once the topsoil is dry, as a guide, which in midsummer may mean morning and evening.
- Autumn (Oct–Nov)
- Every 3 days
- Growth slows as it cools, so water once the soil is dry, as a guide.
- Winter (Dec–Feb)
- Every 7 days
- While overwintering indoors, water sparingly a few days after the soil dries, as a guide.
Light and placement for Lemongrass
Generally wants full sun: from spring to fall, a sunny outdoor spot with moving air is the guide, since low light gives thin leaves and a weaker scent.
Overwintering Lemongrass
Overwintering guide: 5°C (41°F) or above
Tender: when nights fall below about 10°C, cut the leaves back to around 10 to 20 cm and bring it to a bright spot indoors, as a guide; above 5°C it overwinters fairly well, or it can be treated as an annual.
Fertilizing and repotting Lemongrass
Fertilizer
From May to September, slow-release fertilizer about monthly or diluted liquid feed about every two weeks, as a guide; none in winter.
When to repot
Spring–Summer (Mar–Sep)
Common problems with Lemongrass
- Left outdoors over winter, the plant dies of cold.
- The clump outgrows its pot, fills it with roots, and dries out constantly.
- Too little sun leaves the blades thin and the scent weak.
Tips for growing Lemongrass
- Dividing the clump in May or June rejuvenates it and eases crowding in the pot.
- Harvest the outer stalks at the base and leave the young center leaves.
- The leaf edges can cut your hands, so wear gloves when working with it.
These are AI-generated general guidelines. They vary with the variety, the placement and the pot size. For effects on pets or children, consult a veterinarian or a doctor.
Keep your plant log going
Greenery is a free app that keeps your plant care going, with watering reminders and photo records. Available on iOS and Android.
