Narrow-leaved Willowherb
epilobium lanceolatum
Also known as: ["Willowherb","Fireweed"]
Overview
A herbaceous perennial plant with narrow, lance-shaped leaves and tall spikes of pinkish-purple flowers, often found in disturbed areas and along roadsides.
Benefits & Perks
["wildlife attractant (bees, butterflies, birds)","drought tolerant","aesthetic foliage"]
Botanical Classification
| Phylum: | Magnoliophyta |
| Class: | Magnoliopsida |
| Order: | Myrtales |
| Family: | Onagraceae |
| Genus: | Epilobium |
| Botanical Name: | Epilobium lanceolatum |
Plant Characteristics
Basic Information
- Category: Herbs & Weeds
- Suitable Location: border plantings or rock gardens in temperate regions
- Suitable For:
- Is Weed: No
- Allergenicity: low
Environmental Needs
- Climate: {"temperatureRange":"5–30°C"}
- Hardiness: {"zones":"6–9"}
- Misting: rarely required, only if ambient humidity is very low
- Drainage: Fast-draining to prevent waterlogging.
- Soil Type: Well-draining, loamy soil with added organic matter; can tolerate poor soils but thrives with enrichment.
Maintenance Level
- Maintenance Level: low
- Toughness Level: moderate
- Pruning Frequency: Light pruning can be done anytime; major pruning is best done in late winter or early spring before new growth begins.
- Pruning Intensity: Light to moderate; avoid heavy pruning unless necessary to control size or shape.
Care Details
Ideal Sunlight Coverage:
Full sun to partial shade; 6–8 hours of direct sunlight per day, with some afternoon shade in hot climates.
Sunlight Tolerance Tips:
Acclimate plants gradually to intense sunlight; protect from harsh afternoon sun to prevent scorching; adjust placement based on indoor/outdoor conditions.
Care Requirements
Care Difficulty
easymoderate
Sunlight
full sun to partial shade
Rotate plant for even light exposure; use sheer curtains to filter intense sun; monitor for signs of sunburn.
Watering
every 7–10 days during active growth, reduce in winter
Water thoroughly but allow soil to dry between waterings; avoid overwatering, especially in winter.
Soil
well-draining, sandy loam with moderate organic content
pH: Slightly acidic to neutral, pH 6.0–7.0.
Ensure soil is not compacted; use a mix that retains moisture but drains well; avoid heavy clay soils.
Temperature
Prefers cool to moderate temperatures, 50–75°F (10–24°C); tolerates cooler nights but avoids extreme heat.
Avoid sudden temperature changes; protect from drafts; maintain consistent temperatures for optimal growth.
Fertilizing
every 4–6 weeks during growing season, none in winter
Apply fertilizer to moist soil to prevent root burn; flush soil occasionally to prevent salt buildup; reduce feeding in dormant periods.
Propagation
Methods
Stem cuttings or division; stem cuttings are the most common method for home growers.
Step-by-Step Propagation Guide
- Take a 4–6 inch cutting.
- Remove lower leaves.
- Dip in rooting hormone (optional).
- Plant in moist medium.
- Keep humid and warm.
Best Time: Spring or early summer when the plant is actively growing.
Environment
Warm, humid environment with indirect light; maintain temperatures around 65–75°F (18–24°C).
Medium
Well-draining potting mix, such as a mix of peat and perlite or cactus mix.
Hormone
Rooting hormone is optional but recommended for faster root development.
Timeline
Roots typically develop in 3–6 weeks; new growth may appear in 2–3 months.
Tools Needed
Pruning shears, rooting hormone, small pots, well-draining soil mix, plastic wrap or propagator.
Quick Tips
Use sharp, sterile tools to prevent infection; maintain high humidity for successful rooting; avoid overwatering cuttings.
Pruning & Repotting
Pruning Guide
Method
Use clean, sharp tools; make cuts just above a leaf node or bud; remove dead or crossing branches.
Pruning Plan
Prune to maintain shape, encourage bushier growth, and remove dead or diseased parts.
Tools
Pruning shears, sterilizing solution, gloves.
Checklist
Sterilize tools; prune dead or damaged growth; shape the plant; clean up debris after pruning.
Repotting Guide
Best Season
Early spring, before the active growing season begins.
Pot Size
Choose a pot one size larger than the current one, with a diameter 1–2 inches wider.
Method
Remove the plant gently; trim any circling roots; place in a new pot with fresh, well-draining soil; water lightly after repotting.
Suggestions
Repot every 2–3 years or when the plant becomes root-bound; provides fresh soil and room for growth.
Checklist
Select appropriate pot; prepare new soil mix; handle roots carefully; water after repotting; place in appropriate light.
Advanced Care Tips
Watering Mastery
Watering Checklist
Check soil moisture; water deeply; ensure drainage; adjust for season.
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 feels dry; reduce frequency in winter to prevent root rot.
Soil Improvement
Add compost or well-rotted manure to improve fertility and structure; incorporate perlite or sand for better drainage.
Temperature Stress Management
Signs of Temperature Issues
Wilting, leaf drop, or chlorosis in excessive heat; stunted growth or browning edges in cold stress.
Cold Stress
Slows growth, may cause leaf discoloration, and increases susceptibility to pests and diseases.
Solution: Provide protection from frost; move potted plants indoors; use mulch to insulate roots.
Hot Stress
Leaves may scorch, wilt, or drop; growth may become stunted due to excessive heat.
Solution: Provide shade during peak sun hours; increase humidity; 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 a balanced, water-soluble fertilizer diluted to half strength; fertilize every 4–6 weeks during the growing season (spring to early fall); avoid fertilizing in winter.
Common Problems & Solutions
Toxicity Warning
Cats
Non-toxicEpilobium lanceolatum is not known to be toxic to cats. It does not pose a significant risk if ingested in small quantities.
⚠️ Symptoms:
🌿 Toxic Parts:
⚡ Toxic If:
if eaten
Dogs
Non-toxicEpilobium lanceolatum is not known to be toxic to dogs. It does not pose a significant risk if ingested in small quantities.
⚠️ Symptoms:
🌿 Toxic Parts:
⚡ Toxic If:
if eaten
Humans
Non-toxicEpilobium lanceolatum is not known to have toxic effects on humans. It is generally considered safe for consumption in moderate amounts.
⚠️ Symptoms:
🌿 Toxic Parts:
⚡ Toxic If:
if eaten
Frequently Asked Questions
Q: Is Epilobium lanceolatum toxic to pets?
A: No, it is non-toxic to dogs and cats.
Q: Does this plant attract wildlife?
A: Yes, it attracts bees, butterflies, and birds.
Q: How easy is it to care for?
A: It is easy to care for with low maintenance needs.
Quick Reference
| Family: | Onagraceae |
| Care: | easy |
| Light: | full sun to partial shade |
| Water: | every 7–10 days during activ |
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