Crazyweed
senecio integerrimus
Also known as: ["Western Groundsel","Rydberg's Ragwort"]
Overview
A perennial herbaceous plant native to western North America, known for its yellow flower heads and toxic properties.
Benefits & Perks
["wildlife attractant (bees, butterflies, birds)"]
Botanical Classification
| Phylum: | Magnoliophyta |
| Class: | Magnoliopsida |
| Order: | Asterales |
| Family: | Asteraceae |
| Genus: | Senecio |
| Botanical Name: | Senecio integerrimus |
Plant Characteristics
Basic Information
- Category: Flowers
- Suitable Location: rock gardens, open meadows, or containers in full sun
- Suitable For:
- Is Weed: No
- Allergenicity: low
Environmental Needs
- Climate: {"temperatureRange":"–12–30°C"}
- Hardiness: {"zones":"4–9"}
- Misting: rarely required, only if ambient humidity is very low
- Drainage: Fast-draining to prevent waterlogged roots.
- Soil Type: Well-draining succulent or cactus mix with added perlite or coarse sand for improved drainage.
Maintenance Level
- Maintenance Level: moderate
- Toughness Level: moderate
- Pruning Frequency: Annually or every 2–3 years as needed; light pruning can be done anytime.
- Pruning Intensity: Moderate; remove up to one-third of the plant if overgrown, but avoid heavy pruning unless necessary
Care Details
Ideal Sunlight Coverage:
Bright indirect light for 6–8 hours daily; tolerates full sun with gradual acclimation; reduce light slightly in winter.
Sunlight Tolerance Tips:
Acclimate to full sun slowly over 1–2 weeks; protect from intense midday sun; adjust indoor placement to avoid direct scorching.
Care Requirements
Care Difficulty
moderatemoderate
Sunlight
full sun to partial shade
Rotate plant weekly for even light; use sheer curtains to filter intense sun; avoid placing near west-facing windows in summer.
Watering
every 7–10 days during active growth, reduce in winter
Water thoroughly but infrequently; ensure soil dries out between waterings; avoid overwatering to prevent root rot.
Soil
well-draining, sandy loam with moderate organic content
pH: Slightly acidic to neutral (pH 6.0–7.0).
Use pots with drainage holes; avoid heavy garden soil; top-dress with gravel for extra drainage if needed.
Temperature
Prefers 60–75°F (15–24°C); tolerates cooler temperatures down to 50°F (10°C) but avoids frost; thrives in moderate warmth with good air circulation.
Avoid sudden temperature changes; protect from drafts; maintain consistent room temperature for indoor plants.
Fertilizing
every 4–6 weeks during growing season, none in winter
Fertilize only when actively growing; avoid over-fertilizing to prevent salt buildup; flush soil occasionally to remove excess salts.
Propagation
Methods
Stem cuttings; leaf cuttings can also be used but are less reliable.
Step-by-Step Propagation Guide
- Take a healthy cutting.
- Let it callus for 1–2 days.
- Plant in moist medium.
- Keep lightly moist and warm.
Best Time: Spring or early summer when the plant is actively growing.
Environment
Warm, humid environment with indirect light; maintain temperatures around 70°F (21°C).
Medium
Well-draining mix of perlite and peat moss or cactus/succulent soil.
Hormone
Optional but recommended for faster rooting.
Timeline
Roots typically form in 2–4 weeks; new growth may appear in 1–2 months.
Tools Needed
Sharp scissors or knife, rooting hormone (optional), small pots, well-draining medium.
Quick Tips
Use healthy, non-flowering stems; ensure cuttings have at least one node; avoid overwatering new cuttings.
Pruning & Repotting
Pruning Guide
Method
Pinch back tips for bushier growth; cut stems just above a leaf node or junction.
Pruning Plan
Remove dead or leggy growth to maintain shape and encourage bushier growth; prune after flowering or in early spring.
Tools
Clean, sharp pruning shears or scissors, disinfectant for tools.
Checklist
Disinfect tools; prune during dry conditions; remove dead or diseased parts first; shape evenly.
Repotting Guide
Best Season
Spring, before the active growing season begins.
Pot Size
Increase pot size by 1–2 inches (2.5–5 cm) in diameter.
Method
Remove plant gently; trim any circling roots; place in a slightly larger pot with fresh, well-draining soil; water lightly after repotting.
Suggestions
Repot every 2–3 years or when roots fill the pot; necessary to refresh soil and provide space for growth.
Checklist
Choose appropriate pot size; prepare fresh soil mix; handle roots carefully; water sparingly after repotting.
Advanced Care Tips
Watering Mastery
Watering Checklist
Check soil moisture before watering; water deeply; ensure proper drainage; adjust frequency by season.
How to Apply Water Properly
Water directly at the root zone until water drains from the bottom; ensure even moisture without waterlogging; water in the morning to allow foliage to dry.
Watering Schedule Tips
Water deeply once every 7–10 days during active growth in spring and summer; reduce frequency to every 3–4 weeks in fall and winter, allowing soil to dry completely between waterings.
Soil Improvement
Add perlite, coarse sand, or pumice to commercial potting soil; ensure pots have drainage holes.
Temperature Stress Management
Signs of Temperature Issues
Chlorosis or wilting in excessive heat; stunted growth or leaf drop in cold stress; browning leaf edges in temperature fluctuations.
Cold Stress
Slows growth; may cause root damage or leaf drop; increases susceptibility to fungal infections in damp, cold conditions.
Solution: Move to a warmer location above 50°F (10°C); reduce watering; provide gentle bottom heat if necessary.
Hot Stress
Leaves may wilt, curl, or develop brown spots; growth may slow; increased water loss through transpiration.
Solution: Increase humidity with misting or pebble trays; provide shade during peak heat; water more frequently but avoid waterlogging.
Fertilizing Guide
Fertilizing Checklist
Check growth phase before fertilizing; dilute fertilizer properly; apply to moist soil; stop in dormant periods.
Fertilizing Method
Use balanced liquid fertilizer diluted to half strength every 4–6 weeks during spring and summer; cease fertilizing in fall and winter.
Common Problems & Solutions
Toxicity Warning
Cats
ToxicCats are highly sensitive to pyrrolizidine alkaloids found in Senecio integerrimus, which can cause acute or chronic liver toxicity. Even small amounts can be harmful.
⚠️ Symptoms:
🌿 Toxic Parts:
⚡ Toxic If:
if eaten
Dogs
ToxicThe pyrrolizidine alkaloids in Senecio integerrimus are highly toxic to dogs, causing liver damage and potential failure. Chronic exposure can lead to severe health complications.
⚠️ Symptoms:
🌿 Toxic Parts:
⚡ Toxic If:
if eaten
Humans
ToxicSenecio integerrimus contains pyrrolizidine alkaloids, which are hepatotoxic and can cause severe liver damage upon ingestion. These compounds accumulate in the liver over time, leading to chronic liver disease and potential failure.
⚠️ Symptoms:
🌿 Toxic Parts:
⚡ Toxic If:
if eaten
Frequently Asked Questions
Q: Is Senecio integerrimus safe for pets?
A: No, it is highly toxic to dogs and cats.
Q: What are the common uses of this plant?
A: It is primarily valued for its ornamental flowers and wildlife attraction, though it is not commonly used in horticulture due to its toxicity.
Q: How should I care for Senecio integerrimus?
A: It requires moderate care, including well-drained soil and full sun exposure, but avoid ingestion by humans or animals.
Quick Reference
| Family: | Asteraceae |
| Care: | moderate |
| Light: | full sun to partial shade |
| Water: | every 7–10 days during activ |
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