Alpine Willowherb
epilobium anagallidifolium
Also known as: ["Alpine Fireweed","Willow-Leaved Willowherb"]
Overview
A small, delicate herbaceous plant native to alpine and arctic regions, known for its pinkish-purple flowers and willow-like leaves.
Benefits & Perks
["wildlife attractant (bees, butterflies, birds)","cold hardy","rare/collector’s item"]
Botanical Classification
| Phylum: | Magnoliophyta |
| Class: | Magnoliopsida |
| Order: | Myrtales |
| Family: | Onagraceae |
| Genus: | Epilobium |
| Botanical Name: | Epilobium anagallidifolium |
Plant Characteristics
Basic Information
- Category: Herbs & Weeds
- Suitable Location: moist, shaded rock gardens or woodland settings
- Suitable For:
- Is Weed: No
- Allergenicity: low
Environmental Needs
- Climate: {"temperatureRange":"0–25°C"}
- Hardiness: {"zones":"5–8"}
- Misting: rarely required, only if ambient humidity is very low
- Drainage: Fast-draining.
- Soil Type: Well-draining, acidic to neutral soil mix with organic matter.
Maintenance Level
- Maintenance Level: low
- Toughness Level: high
- Pruning Frequency: Annually in early spring or after flowering.
- Pruning Intensity: Light to moderate.
Care Details
Ideal Sunlight Coverage:
Bright indirect light for 4–6 hours per day. Adjust to partial shade during intense summer sun.
Sunlight Tolerance Tips:
Acclimate gradually to direct sunlight to prevent scorching. Place in a spot with filtered light, especially in hot climates.
Care Requirements
Care Difficulty
moderatemoderate
Sunlight
partial shade to full shade
Avoid harsh midday sun; provide dappled light in summer; rotate plant for even growth.
Watering
every 7–10 days during active growth, reduce in winter
Water sparingly to avoid waterlogging; ensure good drainage; water early in the day to reduce fungal risk.
Soil
moist, acidic, peaty soil
pH: 5.5–6.5 (slightly acidic to neutral).
Ensure soil does not compact; avoid heavy clay mixes; maintain consistent moisture levels.
Temperature
Cool to moderate temperatures, ideally 50–65°F (10–18°C). Tolerates cooler conditions but avoids extreme heat.
Avoid sudden temperature changes; protect from drafts; maintain consistent cool conditions.
Fertilizing
every 4–6 weeks during growing season, none in winter
Dilute fertilizer to half strength; fertilize only when actively growing; stop in late summer.
Propagation
Methods
Stem cuttings or division of clumps.
Step-by-Step Propagation Guide
- Take cuttings.
- Apply rooting hormone if used.
- Plant in medium.
- Maintain humidity.
- Transplant once rooted.
Best Time: Early spring or late summer when the plant is not in full bloom.
Environment
Warm, humid environment with indirect light and consistent moisture.
Medium
Well-draining soil mix with perlite or sand.
Hormone
Optional, but rooting hormone can improve success rates.
Timeline
Roots may develop in 3–6 weeks; establish in new pots within a few months.
Tools Needed
Pruning shears, rooting hormone, small pots, well-draining soil mix.
Quick Tips
Use healthy, non-flowering stems; maintain high humidity; avoid overwatering.
Pruning & Repotting
Pruning Guide
Method
Pinch back tips or cut stems just above a leaf node.
Pruning Plan
Light pruning to maintain shape and encourage bushier growth; remove dead or weak stems.
Tools
Clean, sharp pruning shears or scissors.
Checklist
Sterilize tools; prune dead or damaged growth; shape as needed; dispose of clippings.
Repotting Guide
Best Season
Early spring before new growth begins.
Pot Size
One size up from the current pot; ensure good drainage.
Method
Gently remove the plant; trim any circling roots; place in a new pot with fresh soil; water lightly.
Suggestions
Repot every 2–3 years or when the plant becomes root-bound.
Checklist
Choose appropriate pot size; use fresh soil mix; handle roots carefully; water after repotting.
Advanced Care Tips
Watering Mastery
Watering Checklist
Check soil moisture before watering; water at the base; ensure proper drainage; reduce frequency in winter.
How to Apply Water Properly
Water directly at the root zone, ensuring even moisture without saturating the soil. Water until it drains from the bottom but avoid leaving the plant in standing water.
Watering Schedule Tips
Water lightly and infrequently, allowing the soil to dry out between waterings. Reduce watering during dormancy in winter.
Soil Improvement
Add perlite or sand for drainage; incorporate peat moss for acidity; ensure organic matter for fertility.
Temperature Stress Management
Signs of Temperature Issues
Wilting, yellowing leaves, or stunted growth in excessive heat; leaf drop or browning in cold stress.
Cold Stress
Low temperatures can cause leaf discoloration and slow growth, potentially leading to root damage if frozen.
Solution: Protect from frost; move to a sheltered location; use a layer of mulch to insulate roots.
Hot Stress
Excessive heat can lead to dehydration, leaf scorch, and reduced flowering.
Solution: Provide shade during peak heat; increase humidity; water more frequently but carefully.
Fertilizing Guide
Fertilizing Checklist
Use diluted fertilizer; apply during active growth; avoid winter feeding; flush soil occasionally.
Fertilizing Method
Use a balanced, diluted liquid fertilizer every 4–6 weeks during the growing season (spring to early summer). Avoid fertilizing in winter.
Common Problems & Solutions
Toxicity Warning
Cats
Non-toxicEpilobium anagallidifolium is not known to be toxic to cats. There are no documented cases of toxicity in felines after ingestion.
🌿 Toxic Parts:
⚡ Toxic If:
if eaten
Dogs
Non-toxicEpilobium anagallidifolium is not known to be toxic to dogs. There are no reported cases of adverse effects following ingestion by canines.
🌿 Toxic Parts:
⚡ Toxic If:
if eaten
Humans
Non-toxicEpilobium anagallidifolium is not known to exhibit toxic properties to humans. It has not been documented to cause adverse physiological effects upon ingestion.
🌿 Toxic Parts:
⚡ Toxic If:
if eaten
Frequently Asked Questions
Q: Is Epilobium anagallidifolium toxic to pets?
A: No, it is non-toxic to dogs and cats.
Q: Where does this plant typically grow?
A: It is native to alpine and arctic regions, thriving in cold, high-altitude environments.
Q: Does this plant attract wildlife?
A: Yes, it attracts bees, butterflies, and birds, making it a good choice for wildlife gardens.
Quick Reference
| Family: | Onagraceae |
| Care: | moderate |
| Light: | partial shade to full shade |
| Water: | every 7–10 days during activ |
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