Eelgrass, Greenland Lousewort
pedicularis groenlandica
Also known as: ["Eelgrass","Greenland Lousewort"]
Overview
A perennial herbaceous plant native to North America, known for its distinctive eel-like flowers.
Benefits & Perks
["wildlife attractant (bees, butterflies, birds)","rare/collector’s item"]
Botanical Classification
| Phylum: | Magnoliophyta |
| Class: | Magnoliopsida |
| Order: | Lamiales |
| Family: | Orobanchaceae |
| Genus: | Pedicularis |
| Botanical Name: | Pedicularis groenlandica |
Plant Characteristics
Basic Information
- Category: Flowers
- Suitable Location: meadow or garden border in cooler climates, prefers moist but well-drained sites
- Suitable For:
- Is Weed: No
- Allergenicity: low
Environmental Needs
- Climate: {"temperatureRange":"0–30°C"}
- Hardiness: {"zones":"4–8"}
- Misting: not required, but occasional misting can benefit in very dry conditions
- Drainage: Fast-draining to prevent root rot.
- Soil Type: Well-draining, sandy loam with organic matter; mimics natural meadow conditions.
Maintenance Level
- Maintenance Level: moderate
- Toughness Level: moderate
- Pruning Frequency: As needed after flowering or when plant becomes overgrown.
- Pruning Intensity: Light to moderate; avoid heavy pruning unless necessary.
Care Details
Ideal Sunlight Coverage:
Full sun (6–8 hours/day); tolerates partial shade in hot climates.
Sunlight Tolerance Tips:
Acclimate gradually to intense sunlight; protect from harsh afternoon sun; adjust placement based on seasonal light changes.
Care Requirements
Care Difficulty
moderatemoderate
Sunlight
full sun to partial shade
Rotate plant for even light exposure; use sheer curtains to filter intense sun; avoid direct sun during peak heat.
Watering
every 7–10 days during active growth, reduce in winter
Water thoroughly but infrequently; ensure soil dries between waterings; avoid overwatering.
Soil
well-draining, sandy loam with moderate organic matter
pH: Slightly acidic to neutral (pH 6.0–7.0).
Use a mix of potting soil and sand; avoid heavy clay soils; ensure pots have drainage holes.
Temperature
Cool to moderate temperatures (50–75°F); prefers cooler nights.
Monitor temperature fluctuations; use shade cloth in summer; protect from frost in winter.
Fertilizing
rarely needed, apply balanced liquid fertilizer monthly during spring and summer if growth is poor
Apply fertilizer after watering; flush soil occasionally to prevent salt buildup; stop fertilizing before dormancy.
Propagation
Methods
Seed or division; stem cuttings can be challenging.
Step-by-Step Propagation Guide
- Collect seeds or divide clumps.
- Sow seeds or plant cuttings in medium.
- Maintain moisture and warmth.
- Transplant once established.
Best Time: Spring or early summer when plant is actively growing.
Environment
Warm (65–75°F), high humidity, and bright indirect light.
Medium
Well-draining seed starting mix or perlite and peat moss blend.
Hormone
Optional for cuttings; not typically needed for seeds or division.
Timeline
Seeds: 2–4 weeks to germinate; cuttings: 4–6 weeks to root.
Tools Needed
Pruners, seed trays, rooting hormone (optional), misting bottle.
Quick Tips
Use fresh seeds for best germination; keep cuttings humid; avoid disturbing roots during transplanting.
Pruning & Repotting
Pruning Guide
Method
Deadhead flowers; trim back stems to just above a leaf node or bud.
Pruning Plan
Remove spent flower stalks to encourage reblooming; trim leggy growth to maintain shape.
Tools
Pruners, gloves, disinfectant for tools.
Checklist
Clean tools; prune dead or spent flowers; cut just above a node; dispose of clippings.
Repotting Guide
Best Season
Early spring before new growth begins.
Pot Size
Increase pot size by 1–2 inches in diameter.
Method
Remove plant gently; trim roots if crowded; repot in fresh soil with good drainage; water lightly after repotting.
Suggestions
Repot every 2–3 years or when roots fill the container; beneficial for container-grown plants.
Checklist
Choose new pot; prepare fresh soil; inspect roots; water after repotting; place in appropriate light.
Advanced Care Tips
Watering Mastery
Watering Checklist
Check soil moisture; water deeply; ensure drainage; avoid wetting leaves.
How to Apply Water Properly
Water at the base of the plant, ensuring moisture reaches the root zone; allow excess water to drain away; water in the morning to reduce evaporation.
Watering Schedule Tips
Water deeply once the top inch of soil is dry; reduce frequency in winter to prevent root rot.
Soil Improvement
Add perlite or coarse sand for drainage; incorporate compost for fertility; ensure good aeration.
Temperature Stress Management
Signs of Temperature Issues
Wilting, leaf drop, or stunted growth in extreme heat or cold.
Cold Stress
Slows growth, may cause leaf discoloration or dieback in prolonged cold.
Solution: Provide frost protection; move to a sheltered location; avoid cold drafts.
Hot Stress
Leaf scorch, wilting, or reduced flowering in excessive heat.
Solution: Increase humidity, provide shade, water more frequently but avoid waterlogging.
Fertilizing Guide
Fertilizing Checklist
Check fertilizer type; dilute properly; apply during active growth; avoid winter feeding.
Fertilizing Method
Use balanced liquid fertilizer diluted to half strength; fertilize monthly during growing season (spring/summer); avoid fertilizing in winter.
Common Problems & Solutions
Toxicity Warning
Cats
Slightly ToxicCats are susceptible to the hepatotoxic effects of pyrrolizidine alkaloids found in Pedicularis groenlandica. Chronic exposure may lead to severe liver damage.
⚠️ Symptoms:
🌿 Toxic Parts:
⚡ Toxic If:
if eaten
Dogs
Slightly ToxicThe pyrrolizidine alkaloids in Pedicularis groenlandica can lead to hepatic veno-occlusive disease in dogs if consumed regularly. Acute toxicity is rare but possible.
⚠️ Symptoms:
🌿 Toxic Parts:
⚡ Toxic If:
if eaten
Humans
Slightly ToxicPedicularis groenlandica contains pyrrolizidine alkaloids, which can cause liver damage upon chronic ingestion. The effects are generally mild in small quantities but can accumulate over time.
⚠️ Symptoms:
🌿 Toxic Parts:
⚡ Toxic If:
if eaten
Frequently Asked Questions
Q: Is Pedicularis groenlandica toxic to pets?
A: There is insufficient data on its toxicity to pets.
Q: How does Pedicularis groenlandica grow?
A: It thrives in moist, shaded environments and is often found in alpine and subalpine regions.
Q: What are the uses of Pedicularis groenlandica?
A: It is primarily valued for its ornamental and ecological significance, attracting pollinators.
Quick Reference
| Family: | Orobanchaceae |
| Care: | moderate |
| Light: | full sun to partial shade |
| Water: | every 7–10 days during activ |
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