Many-headed Whitlow-grass
polycarpon tetraphyllum
Also known as: ["Four-leaved Whitlow-grass","Many-headed Whitlowwort"]
Overview
A small, herbaceous annual plant with a low-growing habit, characterized by its small, white flowers and simple leaves arranged in opposite pairs.
Benefits & Perks
["low maintenance","wildlife attractant (bees, butterflies, birds)"]
Botanical Classification
| Phylum: | Magnoliophyta |
| Class: | Magnoliopsida |
| Order: | Caryophyllales |
| Family: | Caryophyllaceae |
| Genus: | Polycarpon |
| Botanical Name: | Polycarpon tetraphyllum |
Plant Characteristics
Basic Information
- Category: Herbs & Weeds
- Suitable Location: rock gardens, coastal areas, or containers in full sun
- Suitable For:
- Is Weed: No
- Allergenicity: low
Environmental Needs
- Climate: {"temperatureRange":"5–30°C"}
- Hardiness: {"zones":"9–11"}
- Misting: rarely required, only if ambient humidity is very low
- Drainage: Fast-draining to prevent waterlogging.
- Soil Type: Well-draining, sandy loam with some organic matter.
Maintenance Level
- Maintenance Level: very low
- Toughness Level: very low
- Pruning Frequency: As needed, typically every 2–3 months or after flowering.
- Pruning Intensity: Light to moderate; avoid heavy pruning unless necessary to rejuvenate the plant.
Care Details
Ideal Sunlight Coverage:
Bright indirect light for 6–8 hours daily; can tolerate some direct morning sun but avoid harsh afternoon sun.
Sunlight Tolerance Tips:
Acclimate gradually to direct sun; protect from intense midday sun; adjust placement based on indoor/outdoor conditions.
Care Requirements
Care Difficulty
very easyeasy
Sunlight
full sun to partial shade
Rotate plant weekly for even growth; use sheer curtains to filter intense light; move outdoors in spring/summer for brighter light.
Watering
every 7–10 days during active growth, reduce in winter
Water thoroughly but allow soil to dry between waterings; avoid overwatering, especially in winter.
Soil
well-draining, sandy loam with some organic matter
pH: Slightly acidic to neutral (pH 6.0–7.0).
Use a mix of potting soil and sand; avoid heavy clay soils; ensure pots have drainage holes.
Temperature
Prefers 65–75°F (18–24°C); can tolerate mild fluctuations but avoid extreme cold or heat.
Avoid sudden temperature changes; keep away from heating/cooling vents; maintain consistent room temperature.
Fertilizing
every 4–6 weeks during growing season, none in winter
Dilute fertilizer to prevent burn; fertilize only when actively growing; flush soil occasionally to prevent salt buildup.
Propagation
Methods
Stem cuttings; leaf cuttings can also work but are less reliable.
Step-by-Step Propagation Guide
- Take a healthy cutting.
- Let it callus for a day.
- Plant in moist medium.
- Keep humid 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 mix like perlite and peat moss or cactus mix.
Hormone
Optional but can help speed up rooting.
Timeline
Roots typically form in 2–4 weeks; new growth may take 1–2 months.
Tools Needed
Sharp scissors, rooting hormone (optional), small pots, well-draining medium.
Quick Tips
Use healthy, non-flowering stems; keep cuttings out of direct sun; maintain humidity with a plastic bag if needed.
Pruning & Repotting
Pruning Guide
Method
Pinch back tips or cut stems just above a leaf node to promote branching.
Pruning Plan
Prune to maintain shape, encourage bushier growth, and remove dead or leggy stems.
Tools
Clean, sharp scissors or pruning shears.
Checklist
Sanitize tools; prune dead or leggy stems; shape the plant; dispose of clippings.
Repotting Guide
Best Season
Spring, before the active growing season begins.
Pot Size
One size up from current pot; ensure good drainage holes.
Method
Remove plant gently; trim roots if necessary; place in a slightly larger pot with fresh soil; water lightly.
Suggestions
Repot every 1–2 years or when roots fill the pot; beneficial for growth and soil freshness.
Checklist
Choose appropriate pot; prepare fresh soil mix; handle roots carefully; water after repotting.
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 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
Slows growth and can cause root damage or death in temperatures below 50°F (10°C).
Solution: Move to a warmer location; insulate pots; avoid drafty areas; reduce watering in cold conditions.
Hot Stress
Leaves may scorch, wilt, or drop; growth may slow due to excessive transpiration.
Solution: Provide shade; increase humidity; water more frequently but avoid waterlogging; use shade cloth if outdoors.
Fertilizing Guide
Fertilizing Checklist
Check growth phase; dilute fertilizer; apply to moist soil; avoid winter feeding.
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
Non-toxicPolycarpon tetraphyllum is not known to be toxic to cats. There are no reported adverse effects associated with ingestion by felines.
⚡ Toxic If:
if eaten
Dogs
Non-toxicPolycarpon tetraphyllum is not known to be toxic to dogs. There are no reported adverse effects associated with ingestion by canines.
⚡ Toxic If:
if eaten
Humans
Non-toxicPolycarpon tetraphyllum is not known to exhibit toxic properties when ingested by humans. It is generally considered safe for consumption in small quantities.
⚡ Toxic If:
if eaten
Frequently Asked Questions
Q: Is Polycarpon tetraphyllum toxic to pets?
A: No, it is non-toxic to dogs and cats.
Q: What are the care requirements for Polycarpon tetraphyllum?
A: It requires very low maintenance and is suitable for beginners due to its easy care.
Q: Does this plant attract wildlife?
A: Yes, it attracts bees, butterflies, and birds, making it a good choice for wildlife supporters.
Quick Reference
| Family: | Caryophyllaceae |
| Care: | very easy |
| Light: | full sun to partial shade |
| Water: | every 7–10 days during activ |
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