How to Grow Water Celery
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Water Celery
Oenanthe javanica
vegetableWater celery is an aquatic or semi-aquatic plant native to Southeast Asia, prized for its tender, crisp leaves and stems that resemble miniature celery. It grows in shallow water or marshy conditions and is commonly used in Asian cuisines for its fresh, slightly peppery flavor.
When should you plant Water Celery in your zone?
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Example Water Celery timeline · Pittsburgh, PA (Zone 6b)
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Plant Water Celery
Around Apr 17Near Pittsburgh's average last spring frost.
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Tend & protect
Late spring–summerWatering, feeding, and pest-watch reminders.
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Harvest Water Celery
Around May 17≈ 30 days after planting
Sample dates for Pittsburgh, PA. Sign up to get exact Water Celery dates for your own zip code.
Growing Conditions
Soil
Growing Zones
Find your zone →Thrives in warm zones 9-12; can be grown year-round in tropical climates or as a summer crop in cooler regions
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Get my Water Celery timeline →Growth Stages
Seedling
2-3 weeksTiny seedlings with 2-4 true leaves emerge from the moist growing medium
Keep soil consistently wet but not waterlogged; provide indirect light; maintain warm temperatures (65-75°F)
Vegetative Growth
2-3 weeksPlants develop multiple stems and increasingly feathery leaves that resemble fine celery foliage
Ensure water level stays at 2-4 inches; provide partial shade to moderate sun; apply diluted aquatic fertilizer every 2-3 weeks
Mature Foliage
Ongoing after 30-50 daysFull, bushy plants with dense clusters of tender, crisp green stems and delicate leaves ready for harvest
Maintain consistent water levels; continue regular fertilizing; begin harvesting outer stems to encourage continued growth
Flowering
Variable; 1-2 monthsSmall white or pale pink flowers appear in umbels (umbrella-shaped clusters) above the foliage
Flowering is optional; pinch off flower buds if you prefer tender leaf growth; allow flowering if saving seeds
Seed Production
3-4 weeks after floweringSmall, oval seeds develop in the flower clusters if flowers are left to mature
Allow flowers to dry on plant; collect seeds when dry and brown; store in cool, dry conditions
Companion Planting
Plan your garden →Plant with:
Avoid planting near:
Common Pests
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Spray with water to dislodge; use insecticidal soap or neem oil in early morning; introduce beneficial insects like ladybugs
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Increase humidity by misting; apply neem oil or sulfur spray; ensure adequate water coverage
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Hand-pick in early morning or evening; use copper barriers; introduce predatory aquatic snails; avoid over-watering adjacent areas
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Use yellow sticky traps; spray with insecticidal soap; maintain proper water and humidity levels
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and
Ensure adequate water circulation; avoid stagnant water; maintain clean planting containers; provide good drainage in non-aquatic growing methods
Uses
Asian Cuisine Staple
CulinaryWater celery is commonly used fresh in Vietnamese, Chinese, and Thai cuisines in salads, stir-fries, spring rolls, and soups. Its tender, crisp texture and mild, slightly peppery flavor make it a delicate alternative to regular celery. [source]
Nutritious Greens
CulinaryHigh in vitamins A and C, minerals including potassium and calcium, and contains beneficial antioxidants. Provides crisp, refreshing texture with minimal calories, making it ideal for fresh eating and light dishes. [source]
Traditional Medicine
MedicinalUsed in traditional Asian medicine to support digestion, reduce inflammation, and promote kidney function. Some herbalists recommend it for its purported diuretic and cooling properties in the body. [source]
Aquatic Gardening & Ornament
HouseholdPopular in water gardens, ornamental ponds, and aquascaping for its delicate, feathery appearance and natural ability to grow in wet conditions. Also used in aquaponics systems as both food and biological filter. [source]
Pollinator Support
WildlifeWhen allowed to flower, water celery's delicate flowers attract beneficial insects including bees and small pollinators, supporting local ecosystems and promoting biodiversity in water gardens. [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 when plants are 4-6 inches tall by pinching off outer stems and leaves from the base. Harvest regularly to encourage bushier growth and prevent flowering. Use scissors or sharp knife to cut stems cleanly. Best harvested in the morning when crisp and hydrated. Can be harvested continuously for 2-3 months before replanting. Both stems and leaves are edible.
Fun Facts
- 🌱 Water celery is sometimes called 'Japanese parsley' or 'Chinese celery' and is so popular in Southeast Asian markets that it's cultivated commercially in flooded paddies similar to rice fields.
- 🌱 The plant can be propagated easily by simply placing stem cuttings in water or wet soil, making it one of the easiest greens to multiply without seeds.
- 🌱 Water celery prefers cooler water temperatures (60-75°F) and may bolt or develop stronger flavors in extremely hot climates, making it an ideal cool-season crop in warmer regions.
Gardening Terms
New to gardening? Learn about terms used in this guide:
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