How to Grow Horse Herb
Wikimedia Commons
Horse Herb
Alternanthera maritima
herbHorse herb is a low-growing, creeping perennial herb with small, lance-shaped leaves that have a slightly bitter, peppery flavor. Native to tropical and subtropical regions, it is valued in traditional medicine and cooking for its antimicrobial and digestive properties. The plant produces inconspicuous white or greenish flowers and spreads via stolons.
When should you plant Horse Herb in your zone?
Get a personalized planting timeline — when to start seeds, transplant, and harvest — based on your USDA zone and local frost dates. Free to start.
Example Horse Herb timeline · Pittsburgh, PA (Zone 6b)
-
Plant Horse Herb
Around Apr 17Near Pittsburgh's average last spring frost.
-
Tend & protect
Late spring–summerWatering, feeding, and pest-watch reminders.
-
Harvest Horse Herb
Around Jun 1≈ 45 days after planting
Sample dates for Pittsburgh, PA. Sign up to get exact Horse Herb dates for your own zip code.
Growing Conditions
Soil
Growing Zones
Find your zone →Thrives in zones 9b-11; grows as annual or container plant in cooler zones
Sign up free to see if Horse Herb grows in your zone — and get a personalized planting timeline.
Get my Horse Herb timeline →Growth Stages
Seedling
2-3 weeksSmall, delicate seedlings emerge with cotyledons and first true leaves appearing within 10-14 days
Keep soil warm (70-75°F) and consistently moist. Provide bright light to prevent legginess. Thin seedlings to proper spacing.
Vegetative Growth
3-4 weeksPlant develops bushy, low-growing foliage with increasingly dense lance-shaped leaves along creeping stems
Water regularly and feed with balanced liquid fertilizer every 2-3 weeks. Pinch growing tips to encourage bushiness and branching.
Establishment
2-3 weeksCreeping stems root at nodes and spread horizontally; plant becomes fuller and more vigorous
Continue moderate watering. Allow stolons to spread or keep trimmed for compact form. Side-dress with compost if needed.
Flowering
OngoingTiny white or greenish flowers appear along stems; flowering is inconspicuous but indicates plant maturity
Flowers are not the focus; continue harvesting leaves. Reduce nitrogen feeding to avoid excessive vegetative growth at expense of flavor.
Harvest & Maintenance
Throughout growing seasonPlant reaches full size and can sustain regular leaf harvesting; maintains productivity for months in warm climates
Harvest regularly to encourage new growth. In cooler climates, bring container plants indoors before frost. Rejuvenate leggy plants by cutting back and allowing regrowth.
Companion Planting
Plan your garden →Plant with:
Avoid planting near:
Common Pests
-
Spray with neem oil or insecticidal soap; increase humidity and air circulation
-
Use yellow sticky traps; spray with neem oil or reflective mulch to deter
-
Remove by hand; spray with rubbing alcohol solution or insecticidal soap
-
Improve air circulation; remove affected leaves; avoid overhead watering
Uses
Culinary & Salads
CulinaryFresh leaves add a peppery, slightly bitter flavor to salads, soups, stir-fries, and Asian cuisine. The tender shoots can be used fresh or cooked as a pot herb. [source]
Traditional Medicine
MedicinalUsed in traditional Ayurvedic and Southeast Asian medicine to treat digestive complaints, fevers, and inflammation. Known to have antimicrobial properties. [source]
Digestive Support
MedicinalThe plant is traditionally consumed as a tea or fresh herb preparation to aid digestion and improve appetite due to its bitter properties. [source]
Ornamental Groundcover
HouseholdThe low-growing, spreading habit makes it attractive as a groundcover or edging plant in tropical and subtropical herb gardens. [source]
Pollinator Attraction
WildlifeAlthough flowers are inconspicuous, they can attract small pollinators and beneficial insects to the garden. [source]
This is not medical advice. LizPlants is not a medical resource. Always consult a qualified healthcare professional before using plants medicinally.
Harvest Tips
Begin harvesting young leaves 4-6 weeks after planting once the plant is established. Pinch off leaves and tender stem tips regularly to encourage bushiness and continuous growth. Harvest in the morning after dew dries for best flavor. The plant can be harvested repeatedly throughout the growing season; pinching also prevents early flowering.
Fun Facts
- 🌱 Horse herb (also called 'Chicken grass' or 'Water chickpea') is widely used in Southeast Asian countries, particularly in Thai and Vietnamese cuisine, where it is valued for both culinary and medicinal purposes.
- 🌱 The plant spreads via rooting stolons, making it an excellent living mulch or permaculture plant that can stabilize soil while providing a harvestable crop.
- 🌱 In traditional Indian Ayurveda, horse herb is recognized for its cooling properties and is used to balance pitta dosha, making it part of ancient herbal medicine systems.
Gardening Terms
New to gardening? Learn about terms used in this guide:
Join 30,000 gardeners planning their gardens with LizPlants.
Get your personalized Horse Herb planting timeline
Tell us your zip code and we'll calculate exactly when to start Horse Herb seeds, transplant seedlings, and harvest — based on your USDA zone and local frost dates. Includes calendar reminders and printable task lists. Free to start.
Get my Horse Herb timeline →