Purple Phacelia
phacelia purshii
Also known as: ["Wild Heliotrope","Scorpion Weed"]
Overview
A herbaceous annual plant native to North America, known for its delicate purple flowers that resemble a scorpion's tail.
Benefits & Perks
["long-flowering","wildlife attractant (bees, butterflies, birds)","drought tolerant"]
Botanical Classification
| Phylum: | Magnoliophyta |
| Class: | Magnoliopsida |
| Order: | Boraginales |
| Family: | Hydrophyllaceae |
| Genus: | Phacelia |
| Botanical Name: | Phacelia purshii |
Plant Characteristics
Basic Information
- Category: Flowers
- Suitable Location: garden bed or container in a location with good air circulation
- Suitable For:
- Is Weed: No
- Allergenicity: low
Environmental Needs
- Climate: {"temperatureRange":"5–30°C"}
- Hardiness: {"zones":"4–8"}
- Misting: rarely required, only if ambient humidity is very low
- Drainage: Well-draining to moderately draining.
- Soil Type: Rich, well-draining loam with ample organic matter.
Maintenance Level
- Maintenance Level: low
- Toughness Level: moderate
- Pruning Frequency: Not typically needed; remove spent flower stalks if desired to encourage additional blooms or prevent self-seeding in unwanted areas.
- Pruning Intensity: Light, only removing dead or spent flowers.
Care Details
Ideal Sunlight Coverage:
Full sun to partial shade; 6–8 hours of direct sunlight daily, 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 seasonal light intensity.
Care Requirements
Care Difficulty
easyeasy
Sunlight
full sun to partial shade
Rotate plants for even light exposure; use shade cloth in extreme heat; monitor for signs of sunburn.
Watering
every 7–10 days during active growth, reduce in dormancy
Water deeply to encourage root growth; avoid overhead watering to reduce fungal issues; adjust frequency based on weather and soil moisture.
Soil
well-draining, loamy soil with moderate organic matter
pH: Slightly acidic to neutral (pH 6.0–7.0).
Ensure good drainage to prevent root rot; amend with organic matter for fertility; avoid compacted soil.
Temperature
Cool to moderate temperatures, ideally 60–75°F (15–24°C). Tolerates cooler spring conditions but may struggle in prolonged heat.
Monitor nighttime temperatures; avoid sudden temperature fluctuations; protect from cold winds.
Fertilizing
every 4–6 weeks during spring and summer
Apply fertilizer to moist soil to prevent root burn; cease fertilizing when flowering slows; use organic options for gentle feeding.
Propagation
Methods
Seed propagation is the most common and reliable method for Phacelia purshii.
Step-by-Step Propagation Guide
- Sow seeds directly into prepared soil.
- Lightly cover seeds with soil.
- Keep moist until germination.
- Thin seedlings as needed.
Best Time: Early spring, as soon as the soil can be worked, or late summer for overwintering seedlings.
Environment
Warm soil (60–70°F or 15–21°C), consistent moisture, and partial shade until seedlings are established.
Medium
Well-draining seed starting mix or garden soil with some compost.
Hormone
Not required for seed propagation.
Timeline
Germination typically occurs within 10–21 days under optimal conditions; plants reach flowering size in one season.
Tools Needed
Seed trays or garden space, watering can, labels, and a light source if starting indoors.
Quick Tips
Sow seeds in groups for easier thinning; keep soil consistently moist but not waterlogged; protect young seedlings from pests.
Pruning & Repotting
Pruning Guide
Method
Snip off faded flower stalks at the base with clean shears or fingers.
Pruning Plan
Minimal pruning is required for Phacelia purshii, as it is a short-lived annual with a natural, self-cleaning habit.
Tools
Hand pruners or fingers for deadheading.
Checklist
Check for spent flowers; snip cleanly at the base; dispose of debris to prevent disease; no further action needed.
Repotting Guide
Best Season
Early spring, at the start of the growing season.
Pot Size
Use a pot one size larger than the current container, ensuring it is not excessively large.
Method
Use a well-draining potting mix; gently tease out roots if pot-bound; ensure adequate drainage holes.
Suggestions
Phacelia purshii is an annual and typically does not require repotting. If grown in containers, repot annually in spring with fresh soil.
Checklist
Choose appropriate pot size; prepare fresh soil mix; handle roots gently; water thoroughly after repotting.
Advanced Care Tips
Watering Mastery
Watering Checklist
Check soil moisture before watering; water deeply at the base; ensure proper drainage; adjust for weather conditions.
How to Apply Water Properly
Water at the base of the plant, ensuring moisture reaches the root zone. Apply until water begins to drain from the bottom, then cease to avoid waterlogging.
Watering Schedule Tips
Water regularly during spring growth, reducing frequency as flowering progresses and ceases. Allow soil to dry slightly between waterings to prevent root rot.
Soil Improvement
Incorporate compost or well-rotted manure to enhance fertility and structure; add sand or perlite if soil is heavy.
Temperature Stress Management
Signs of Temperature Issues
Wilting, yellowing leaves, or stunted growth in excessive heat; delayed flowering or browning edges in cold stress.
Cold Stress
Low temperatures can slow growth and flowering, potentially causing tissue damage if frost occurs.
Solution: Provide frost protection in early spring; avoid planting in areas prone to late frosts; use row covers if necessary.
Hot Stress
Excessive heat can lead to wilting, flower drop, and reduced vigor, especially in dry conditions.
Solution: Provide afternoon shade; increase watering frequency; use mulch to retain soil moisture.
Fertilizing Guide
Fertilizing Checklist
Use diluted fertilizer; apply during active growth; avoid late-season feeding; water after application.
Fertilizing Method
Use a balanced, water-soluble fertilizer diluted to half strength every 4–6 weeks during active growth. Avoid fertilizing late in the season to prevent tender growth susceptible to frost.
Common Problems & Solutions
Toxicity Warning
Cats
Non-toxicPhacelia purshii is not known to be toxic to cats. It does not produce any known compounds that are harmful to felines.
🌿 Toxic Parts:
⚡ Toxic If:
if eaten
Dogs
Non-toxicPhacelia purshii is not known to be toxic to dogs. It does not produce any known compounds that are harmful to canines.
🌿 Toxic Parts:
⚡ Toxic If:
if eaten
Humans
Non-toxicPhacelia purshii is not known to exhibit toxic properties to humans. It is generally considered safe for consumption in moderate quantities.
🌿 Toxic Parts:
⚡ Toxic If:
if eaten
Frequently Asked Questions
Q: Is Phacelia purshii toxic to pets?
A: There is no reliable information available regarding its toxicity to pets.
Q: How often should Phacelia purshii be watered?
A: It is drought tolerant and requires minimal watering, especially once established.
Q: Does Phacelia purshii attract wildlife?
A: Yes, it is known to attract bees, butterflies, and birds due to its nectar-rich flowers.
Quick Reference
| Family: | Hydrophyllaceae |
| Care: | easy |
| Light: | full sun to partial shade |
| Water: | every 7–10 days during activ |
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