Blue porterweed, Snakeweed
stachytarpheta cayennensis
Also known as: ["Brazilian tea","Blue snakeweed"]
Overview
A vibrant flowering shrub native to tropical regions, known for its clusters of blue or purple flowers and slender stems.
Benefits & Perks
["long-flowering","drought tolerant","wildlife attractant (bees, butterflies, birds)"]
Botanical Classification
| Phylum: | Magnoliophyta |
| Class: | Magnoliopsida |
| Order: | Lamiales |
| Family: | Verbenaceae |
| Genus: | Stachytarpheta |
| Botanical Name: | Stachytarpheta cayennensis |
Plant Characteristics
Basic Information
- Category: Flowers
- Suitable Location: outdoor garden bed in warm, sheltered area
- Suitable For:
- Is Weed: No
- Allergenicity: low
Environmental Needs
- Climate: {"temperatureRange":"15–35°C"}
- Hardiness: {"zones":"9–11"}
- Misting: rarely required, only if ambient humidity is very low
- Drainage: Fast-draining
- Soil Type: Well-draining, loamy soil with organic matter
Maintenance Level
- Maintenance Level: moderate
- Toughness Level: high
- Pruning Frequency: Light pruning every 4–6 weeks during growing season; heavy pruning in late winter/early spring.
- Pruning Intensity: Moderate to heavy
Care Details
Ideal Sunlight Coverage:
Full sun (6–8 hours/day); tolerates partial shade but may become leggy.
Sunlight Tolerance Tips:
Acclimate new plants to full sun gradually; protect from intense midday sun in hot climates; ensure good air circulation to prevent mildew.
Care Requirements
Care Difficulty
easyeasy
Sunlight
full sun to partial shade
Rotate plant for even growth; use sheer curtains in intense sun; avoid sudden light changes.
Watering
every 7–10 days during active growth, reduce in winter
Water thoroughly until it drains from the bottom; allow soil to dry between waterings; avoid overhead watering to prevent fungal issues.
Soil
well-draining, sandy loam with moderate organic matter
pH: Slightly acidic to neutral (6.0–7.0)
Use a mix of potting soil and perlite; avoid heavy clay soils; ensure pots have drainage holes.
Temperature
Warm temperatures (65–85°F/18–29°C); sensitive to frost; prefers stable conditions.
Avoid sudden temperature shifts; protect from frost; maintain consistent warmth.
Fertilizing
every 4–6 weeks during growing season with balanced liquid fertilizer
Fertilize after watering to prevent root burn; flush soil occasionally to prevent salt buildup; stop in fall/winter.
Propagation
Methods
Stem cuttings
Step-by-Step Propagation Guide
- Take 4–6 inch cuttings.
- Remove lower leaves.
- Dip in hormone.
- Plant in medium.
- Keep moist and humid.
Best Time: Spring or early summer when growth is active
Environment
High humidity (70–80%), warm (70–75°F/21–24°C), indirect light
Medium
Well-draining mix of perlite and peat moss
Hormone
Optional but recommended for faster rooting
Timeline
Roots in 2–4 weeks; establish in 2–3 months
Tools Needed
Pruning shears, rooting hormone, small pots, misting spray bottle
Quick Tips
Use healthy, non-flowering stems; maintain humidity with a plastic bag; avoid direct sun.
Pruning & Repotting
Pruning Guide
Method
Pinch back tips; cut stems just above a leaf node; remove crossing or crowded branches.
Pruning Plan
Encourage bushier growth and more blooms; remove dead or weak stems to improve air circulation.
Tools
Pruning shears, sharp knife, gloves
Checklist
Sterilize tools; prune during active growth; remove dead/diseased parts; shape as desired.
Repotting Guide
Best Season
Spring, before new growth begins
Pot Size
One size larger pot (1–2 inches wider in diameter)
Method
Remove plant gently; trim roots if needed; place in new pot with fresh soil; water lightly.
Suggestions
Repot every 1–2 years or when roots fill the pot; beneficial for growth and vigor.
Checklist
Check root bound status; prepare new pot with drainage; use fresh soil mix; water after repotting.
Advanced Care Tips
Watering Mastery
Watering Checklist
Check soil moisture; water deeply; ensure drainage; adjust for season.
How to Apply Water Properly
Water directly at the root zone, ensuring even saturation; water early in the morning to minimize evaporation; ensure excess water drains away to prevent waterlogging.
Watering Schedule Tips
Water deeply once the top inch of soil feels dry; reduce frequency in winter to prevent root rot.
Soil Improvement
Add perlite or sand for drainage; incorporate compost for fertility; ensure good aeration.
Temperature Stress Management
Signs of Temperature Issues
Wilting, leaf drop, or stunted growth in cold; scorching or leaf burn in excessive heat.
Cold Stress
Growth halts; leaves may turn yellow or brown; risk of root damage below 50°F/10°C.
Solution: Move to a warmer location; use a heat mat if needed; protect from drafts.
Hot Stress
Wilting, leaf scorch, or flower drop; may cease blooming in extreme heat.
Solution: Provide shade during peak sun; increase humidity; water more frequently but avoid waterlogging.
Fertilizing Guide
Fertilizing Checklist
Check season; dilute fertilizer; apply to moist soil; monitor for signs of overfertilization.
Fertilizing Method
Use balanced liquid fertilizer diluted to half strength every 4–6 weeks during growing season (spring/summer); avoid fertilizing in winter.
Common Problems & Solutions
Toxicity Warning
Cats
Slightly ToxicCats may experience mild gastrointestinal upset if they ingest Stachytarpheta cayennensis. The plant is not highly toxic to cats but can cause discomfort.
⚠️ Symptoms:
🌿 Toxic Parts:
⚡ Toxic If:
if ingested
Dogs
Slightly ToxicIn dogs, ingestion of Stachytarpheta cayennensis may lead to mild gastrointestinal upset. The plant is not considered highly toxic but can cause discomfort if consumed.
⚠️ Symptoms:
🌿 Toxic Parts:
⚡ Toxic If:
if ingested
Humans
Slightly ToxicStachytarpheta cayennensis, commonly known as purple snakeroot, contains compounds that can cause mild gastrointestinal distress when ingested in significant amounts. The plant's effects are generally not severe but can be uncomfortable.
⚠️ Symptoms:
🌿 Toxic Parts:
⚡ Toxic If:
if eaten in large quantities
Frequently Asked Questions
Q: Is Stachytarpheta cayennensis toxic to pets?
A: No, it is non-toxic to dogs and cats.
Q: How often should I water this plant?
A: Water moderately, allowing the soil to dry slightly between waterings.
Q: Does this plant attract pollinators?
A: Yes, it is highly attractive to bees, butterflies, and hummingbirds.
Quick Reference
| Family: | Verbenaceae |
| Care: | easy |
| Light: | full sun to partial shade |
| Water: | every 7–10 days during activ |
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