Yellow Bartsia
parentucellia viscosa
Also known as: ["Yellow Bartsia","Viscous Parentucellia"]
Overview
A hemiparasitic annual herb native to Europe and parts of Asia, characterized by its yellow flowers and parasitic habit on other plants.
Benefits & Perks
["wildlife attractant (bees, butterflies, birds)"]
Botanical Classification
| Phylum: | Magnoliophyta |
| Class: | Magnoliopsida |
| Order: | Lamiales |
| Family: | Orobanchaceae |
| Genus: | Parentucellia |
| Botanical Name: | Parentucellia viscosa |
Plant Characteristics
Basic Information
- Category: Herbs & Weeds
- Suitable Location: outdoor garden bed in a sunny to partially shaded area
- Suitable For:
- Is Weed: No
- Allergenicity: low
Environmental Needs
- Climate: {"temperatureRange":"10–30°C"}
- Hardiness: {"zones":"7–10"}
- Misting: rarely required, only if ambient humidity is very low
- Drainage: Fast-draining to prevent waterlogging.
- Soil Type: Well-draining potting mix with added perlite or sand.
Maintenance Level
- Maintenance Level: low
- Toughness Level: low
- Pruning Frequency: As needed, typically every 2–3 months or after flowering.
- Pruning Intensity: Moderate; remove up to one-third of growth if necessary.
Care Details
Ideal Sunlight Coverage:
Bright indirect light for 6–8 hours daily; can tolerate partial shade but may become leggy.
Sunlight Tolerance Tips:
Acclimate gradually to intense light to prevent scorching; place in a spot with filtered sunlight if outdoors.
Care Requirements
Care Difficulty
moderatemoderate
Sunlight
full sun to partial shade
Rotate plant weekly for even growth; avoid direct midday sun.
Watering
every 7–10 days during active growth, reduce in winter
Water thoroughly but allow soil to dry between waterings; avoid overwatering, especially in cooler months.
Soil
well-draining, sandy loam with moderate organic content
pH: Slightly acidic to neutral (pH 6.0–7.0).
Ensure soil is not compacted; avoid heavy clay soils.
Temperature
Prefers moderate temperatures (65–75°F); can tolerate cooler conditions but avoid frost.
Avoid sudden temperature changes; maintain consistent warmth during active growth.
Fertilizing
every 4–6 weeks during growing season, none in winter
Fertilize only when actively growing; flush soil occasionally to prevent salt buildup.
Propagation
Methods
Stem cuttings or seed; stem cuttings are more reliable for home growers.
Step-by-Step Propagation Guide
- Take a healthy cutting.
- Apply rooting hormone if using.
- Plant in medium.
- Keep moist and warm.
Best Time: Spring or early summer when the plant is actively growing.
Environment
Warm, humid environment with indirect light; maintain consistent moisture.
Medium
Well-draining potting mix with perlite or sand.
Hormone
Rooting hormone is optional but can improve success rates.
Timeline
Roots may develop in 2–4 weeks; establish in new pot after 6–8 weeks.
Tools Needed
Pruning shears, rooting hormone, small pots, well-draining mix.
Quick Tips
Use a clear plastic bag to maintain humidity; ensure cuttings are taken from healthy stems.
Pruning & Repotting
Pruning Guide
Method
Pinch back tips or cut stems just above a leaf node.
Pruning Plan
Prune to maintain shape and encourage bushier growth; remove dead or leggy stems.
Tools
Clean pruning shears or scissors.
Checklist
Sterilize tools; prune during active growth; remove dead or diseased parts.
Repotting Guide
Best Season
Spring, before the active growing season begins.
Pot Size
Increase pot size by 1–2 inches in diameter.
Method
Remove plant gently; trim roots if crowded; repot in fresh, well-draining soil.
Suggestions
Repot every 2–3 years or when roots outgrow the pot; beneficial for growth.
Checklist
Check root bound status; prepare new pot with drainage; use fresh soil.
Advanced Care Tips
Watering Mastery
Watering Checklist
Check soil moisture; water thoroughly; ensure proper drainage; adjust frequency seasonally.
How to Apply Water Properly
Water deeply at the root zone until water drains from the bottom; ensure excess water is removed to prevent waterlogging.
Watering Schedule Tips
Water when the top inch of soil is dry; reduce frequency in winter to prevent root rot.
Soil Improvement
Add perlite or coarse sand to improve drainage; incorporate organic matter for fertility.
Temperature Stress Management
Signs of Temperature Issues
Wilting, yellowing leaves, or stunted growth in extreme heat or cold.
Cold Stress
Slows growth and may cause leaf drop; prolonged cold can lead to root damage.
Solution: Move to a warmer location; protect from drafts; use a heat mat if necessary.
Hot Stress
Leaves may wilt or scorch; growth may slow in excessive heat.
Solution: Provide shade during peak heat; increase humidity; ensure adequate water.
Fertilizing Guide
Fertilizing Checklist
Check growth phase; 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 growing season; avoid fertilizing in winter.
Common Problems & Solutions
Toxicity Warning
Cats
Slightly ToxicCats that ingest Parentucellia viscosa may experience mild gastrointestinal irritation. The plant's compounds can cause digestive upset, though severe toxicity is rare.
⚠️ Symptoms:
🌿 Toxic Parts:
⚡ Toxic If:
if eaten
Dogs
Slightly ToxicIn dogs, ingestion of Parentucellia viscosa may lead to mild gastrointestinal upset. The plant's compounds can irritate the stomach lining, causing discomfort and potential vomiting.
⚠️ Symptoms:
🌿 Toxic Parts:
⚡ Toxic If:
if eaten
Humans
Slightly ToxicParentucellia viscosa, commonly known as yellow broomrape, is a parasitic plant that can cause mild gastrointestinal distress if ingested. The plant contains compounds that may irritate the digestive tract, leading to discomfort.
⚠️ Symptoms:
🌿 Toxic Parts:
⚡ Toxic If:
if eaten
Frequently Asked Questions
Q: Is Parentucellia viscosa toxic to pets?
A: There is insufficient data on its toxicity to pets.
Q: How does Parentucellia viscosa grow?
A: It is a hemiparasitic plant that relies partially on host plants for nutrients.
Q: Is Parentucellia viscosa suitable for beginners?
A: It is not recommended for beginners due to its parasitic nature and specific growth requirements.
Quick Reference
| Family: | Orobanchaceae |
| Care: | moderate |
| Light: | full sun to partial shade |
| Water: | every 7–10 days during activ |
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