Swamp Cress
rorippa palustris
Also known as: ["Marsh Yellowcress","Swamp Yellowcress"]
Overview
A herbaceous annual or biennial plant typically found in wetland habitats, characterized by its yellow flowers and pinnately divided leaves.
Benefits & Perks
["wildlife attractant (bees, butterflies, birds)","drought tolerant","shade tolerant"]
Botanical Classification
| Phylum: | Magnoliophyta |
| Class: | Magnoliopsida |
| Order: | Brassicales |
| Family: | Brassicaceae |
| Genus: | Rorippa |
| Botanical Name: | Rorippa palustris |
Plant Characteristics
Basic Information
- Category: Herbs & Weeds
- Suitable Location: wetland edges, bog gardens, or containers with constant moisture
- Suitable For:
- Is Weed: No
- Allergenicity: low
Environmental Needs
- Climate: {"temperatureRange":"0–30°C"}
- Hardiness: {"zones":"4–9"}
- Misting: rarely required
- Drainage: Moderate to well-draining; avoid waterlogged soil.
- Soil Type: Moist, fertile, well-draining soil; can tolerate clay or loamy conditions.
Maintenance Level
- Maintenance Level: very low
- Toughness Level: very low
- Pruning Frequency: As needed, typically every 2–3 months or after flowering.
- Pruning Intensity: Light to moderate; avoid heavy pruning unless necessary.
Care Details
Ideal Sunlight Coverage:
Full sun to partial shade (4–6 hours of direct sunlight daily); tolerates some shade in hot climates.
Sunlight Tolerance Tips:
Acclimate gradually to intense sunlight; protect from harsh midday sun; adjust placement based on seasonal light changes.
Care Requirements
Care Difficulty
very easyeasy
Sunlight
partial shade to full sun
Morning sun is ideal; avoid hot afternoon sun; rotate plant for even light exposure.
Watering
every 3–5 days, more frequently in hot weather
Maintain even moisture, avoid waterlogging, and adjust based on season and growth stage.
Soil
moist, fertile, loamy soil
pH: Slightly acidic to neutral (pH 6.0–7.0).
Keep soil consistently moist; improve drainage if needed; avoid compacted soil.
Temperature
Prefers cool to moderate temperatures (60–75°F or 15–24°C); tolerates mild frosts.
Protect from frost; avoid sudden temperature swings; maintain moderate conditions.
Fertilizing
every 4–6 weeks during active growth
Apply fertilizer after watering; flush soil occasionally to prevent salt buildup; reduce frequency in cooler months.
Propagation
Methods
Stem cuttings or division; seeds can also be sown in spring.
Step-by-Step Propagation Guide
- Take cuttings.
- Remove lower leaves.
- Dip in rooting hormone (optional).
- Plant in medium.
- Keep moist and warm.
Best Time: Spring or early summer when the plant is actively growing.
Environment
Warm, humid conditions with indirect light; maintain consistent moisture.
Medium
Moist, well-draining soil mix with perlite or sand.
Hormone
Optional, but rooting hormone can speed up root development.
Timeline
Roots typically form in 2–4 weeks; new growth appears in 6–8 weeks.
Tools Needed
Pruning shears, rooting hormone, small pots, misting spray bottle.
Quick Tips
Use healthy, non-flowering stems; maintain high humidity; avoid direct sunlight.
Pruning & Repotting
Pruning Guide
Method
Pinch back tips or trim stems just above a leaf node; remove yellow or dead leaves.
Pruning Plan
Light pruning to maintain shape and encourage bushier growth; remove dead or damaged foliage.
Tools
Clean pruning shears or scissors, gloves.
Checklist
Use clean tools; prune dead or diseased parts; shape as desired; dispose of clippings.
Repotting Guide
Best Season
Spring, before the active growing season begins.
Pot Size
One size larger pot (e.g., +2 inches in diameter); ensure good drainage.
Method
Remove plant gently; trim roots if crowded; place in a slightly larger pot with fresh soil; water thoroughly.
Suggestions
Repot every 1–2 years or when roots outgrow the container; beneficial for growth and health.
Checklist
Choose appropriate pot size; prepare fresh soil mix; handle roots carefully; water after repotting.
Advanced Care Tips
Watering Mastery
Watering Checklist
Check soil moisture daily; water when top inch is dry; ensure proper drainage; adjust for weather.
How to Apply Water Properly
Water thoroughly at the root zone until it drains from the bottom, ensuring even saturation without pooling.
Watering Schedule Tips
Keep soil consistently moist, especially during active growth; reduce watering in winter dormancy.
Soil Improvement
Add organic matter like compost; incorporate perlite or sand for drainage; ensure consistent moisture.
Temperature Stress Management
Signs of Temperature Issues
Wilting, yellowing leaves, stunted growth, or leaf drop in extreme heat or cold.
Cold Stress
Slows growth and may cause leaf discoloration or dieback in prolonged freezing conditions.
Solution: Provide frost protection in winter; avoid sudden temperature drops; ensure good air circulation.
Hot Stress
Leaves may scorch, wilt, or drop in excessive heat; growth may become stressed.
Solution: Provide shade during peak heat; increase humidity; water more frequently but avoid waterlogging.
Fertilizing Guide
Fertilizing Checklist
Use diluted fertilizer; apply during active growth; avoid winter feeding; flush soil periodically.
Fertilizing Method
Use a balanced liquid fertilizer diluted to half strength every 4–6 weeks during growing season; avoid fertilizing in winter.
Common Problems & Solutions
Toxicity Warning
Cats
Non-toxicRorippa palustris is not considered toxic to cats. The plant lacks compounds that are harmful to felines, though ingestion in large quantities may result in mild gastrointestinal irritation.
⚠️ Symptoms:
🌿 Toxic Parts:
⚡ Toxic If:
if eaten
Dogs
Non-toxicRorippa palustris is not considered toxic to dogs. The plant does not contain known compounds that are harmful to canines, though ingestion in large amounts may cause mild gastrointestinal upset.
⚠️ Symptoms:
🌿 Toxic Parts:
⚡ Toxic If:
if eaten
Humans
Non-toxicRorippa palustris is generally considered non-toxic to humans. However, consuming large quantities may cause mild gastrointestinal discomfort due to its slightly bitter taste and potential irritant properties.
⚠️ Symptoms:
🌿 Toxic Parts:
⚡ Toxic If:
if eaten in large quantities
Frequently Asked Questions
Q: Is Rorippa palustris edible?
A: While some Rorippa species are edible, R. palustris is not commonly consumed and its edibility is not well-documented.
Q: Where does Rorippa palustris grow naturally?
A: It naturally grows in wetland habitats, marshes, and along streams or ponds.
Q: Does Rorippa palustris attract wildlife?
A: Yes, it attracts bees, butterflies, and other pollinators due to its flowering habit.
Quick Reference
| Family: | Brassicaceae |
| Care: | very easy |
| Light: | partial shade to full sun |
| Water: | every 3–5 days, more frequen |
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