Kerner's Lousewort
pedicularis kerneri
Also known as: ["Kerner's Lousewort"]
Overview
A herbaceous perennial plant native to alpine regions, characterized by its distinctive inflorescence and potential parasitic growth habit on other plants.
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 kerneri |
Plant Characteristics
Basic Information
- Category: Herbs & Weeds
- Suitable Location: shaded rock garden or woodland setting
- Suitable For:
- Is Weed: No
- Allergenicity: low
Environmental Needs
- Climate: {"temperatureRange":"0–30°C"}
- Hardiness: {"zones":"6–8"}
- Misting: rarely required, only if ambient humidity is very low
- Drainage: Fast-draining to prevent waterlogging.
- Soil Type: Well-draining, slightly acidic to neutral potting mix with added organic matter.
Maintenance Level
- Maintenance Level: moderate
- Toughness Level: moderate
- Pruning Frequency: Light pruning can be done as needed; major pruning in 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:
Bright indirect light for 4–6 hours daily; avoid direct sunlight which can scorch leaves.
Sunlight Tolerance Tips:
Acclimate to brighter light gradually; protect from intense midday sun; place in a spot with filtered light or partial shade.
Care Requirements
Care Difficulty
moderatemoderate
Sunlight
partial shade to full shade
Rotate plant weekly for even growth; use sheer curtains to filter direct light; avoid south-facing windows in summer.
Watering
every 7–10 days during active growth, reduce in winter
Water thoroughly but infrequently; ensure proper drainage; avoid waterlogging.
Soil
well-draining, humus-rich soil
pH: 6.0–7.0 (slightly acidic to neutral).
Avoid heavy clay soils; use a mix with good aeration; check drainage by watering before planting.
Temperature
Prefers cool to moderate temperatures (60–70°F / 15–21°C); tolerates cooler nights down to 50°F / 10°C.
Avoid sudden temperature changes; maintain consistent temperatures; protect from heat sources like radiators.
Fertilizing
every 4–6 weeks during growing season, none in winter
Never fertilize dry soil; flush soil occasionally to prevent salt buildup; reduce frequency in dormant periods.
Propagation
Methods
Stem cuttings or division; stem cuttings are more common for home growers.
Step-by-Step Propagation Guide
- Take a 4–6 inch cutting.
- Remove lower leaves.
- Dip in rooting hormone (optional).
- Plant in medium.
- Maintain humidity.
Best Time: Spring or early summer when the plant is actively growing.
Environment
High humidity (70–90%), warm temperatures (65–75°F / 18–24°C), and indirect light.
Medium
Well-draining potting mix with perlite or sand; can also root in water initially.
Hormone
Rooting hormone is optional but recommended for faster rooting.
Timeline
Roots may develop in 3–6 weeks; new growth may take an additional 2–3 months.
Tools Needed
Pruning shears, rooting hormone, small pots, humidity dome or plastic bag.
Quick Tips
Use healthy, non-flowering stems; keep soil consistently moist but not waterlogged; provide bottom heat if possible.
Pruning & Repotting
Pruning Guide
Method
Pinch back tips to encourage branching; trim leggy stems to promote compact growth.
Pruning Plan
Prune to maintain shape, encourage bushier growth, and remove dead or diseased parts.
Tools
Clean, sharp pruning shears or scissors.
Checklist
Sanitize tools; prune in early spring; remove dead/damaged growth; shape as desired.
Repotting Guide
Best Season
Early spring before active growth begins.
Pot Size
Increase pot size by 1–2 inches in diameter; ensure good drainage holes.
Method
Remove plant gently; trim any dead roots; place in a slightly larger pot with fresh soil; water lightly after repotting.
Suggestions
Repot every 2–3 years or when roots fill the pot; may need repotting if growth slows or soil dries out quickly.
Checklist
Choose appropriate pot; prepare new soil mix; handle roots carefully; water after repotting.
Advanced Care Tips
Watering Mastery
Watering Checklist
Check soil moisture before watering; water thoroughly; ensure drainage; adjust frequency seasonally.
How to Apply Water Properly
Water directly at the root zone until water drains from the bottom; ensure even moisture without saturating the soil; water in the morning to allow foliage to dry.
Watering Schedule Tips
Water moderately during active growth (spring/summer), allowing soil to dry slightly between waterings; reduce frequency in winter to prevent root rot.
Soil Improvement
Add perlite or coarse sand for drainage; incorporate compost for fertility; ensure soil is loose and airy.
Temperature Stress Management
Signs of Temperature Issues
Wilting, leaf drop, or stunted growth in excessive heat; yellowing or browning leaves in cold stress.
Cold Stress
Slows metabolic processes; may cause root damage if temperatures drop below 40°F / 4°C.
Solution: Protect from drafts and cold windows; move to a warmer location if temperatures drop below 50°F / 10°C.
Hot Stress
Leaves may scorch, wilt, or drop; growth may become stunted due to excessive heat.
Solution: Provide shade during peak heat; increase humidity; ensure adequate water without overwatering.
Fertilizing Guide
Fertilizing Checklist
Check season; dilute fertilizer; apply to moist soil; avoid contact with leaves.
Fertilizing Method
Use a balanced liquid fertilizer diluted to half strength every 4–6 weeks during spring and summer; avoid fertilizing in fall and winter.
Common Problems & Solutions
Toxicity Warning
Cats
Slightly ToxicCats are susceptible to liver toxicity from the pyrrolizidine alkaloids present in Pedicularis kerneri, which can result in severe liver damage with prolonged exposure.
⚠️ Symptoms:
🌿 Toxic Parts:
⚡ Toxic If:
if eaten
Dogs
Slightly ToxicThe pyrrolizidine alkaloids in Pedicularis kerneri can lead to hepatic veno-occlusive disease in dogs if consumed regularly over time.
⚠️ Symptoms:
🌿 Toxic Parts:
⚡ Toxic If:
if eaten
Humans
Slightly ToxicPedicularis kerneri contains pyrrolizidine alkaloids, which can cause liver damage upon chronic ingestion. The toxic effects are cumulative and may not manifest immediately.
⚠️ Symptoms:
🌿 Toxic Parts:
⚡ Toxic If:
if eaten
Frequently Asked Questions
Q: Is Pedicularis kerneri toxic to humans or pets?
A: The toxicity of Pedicularis kerneri to humans and pets is currently unknown.
Q: How should Pedicularis kerneri be cared for?
A: It requires moderate care, thriving in alpine conditions with well-drained soil and partial sunlight.
Q: Does Pedicularis kerneri attract wildlife?
A: Yes, it is known to attract bees, butterflies, and other pollinators.
Quick Reference
| Family: | Orobanchaceae |
| Care: | moderate |
| Light: | partial shade to full shade |
| Water: | every 7–10 days during activ |
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