Yellow Hibiscus
hibiscus calyphyllus
Also known as: ["Congo Hibiscus","Yellow Hibiscus"]
Overview
A deciduous shrub with bright yellow flowers and palmate leaves, native to tropical and subtropical regions.
Benefits & Perks
["long-flowering","wildlife attractant (bees, butterflies, birds)","fragrant flowers"]
Botanical Classification
| Phylum: | Magnoliophyta |
| Class: | Magnoliopsida |
| Order: | Malvales |
| Family: | Malvaceae |
| Genus: | Hibiscus |
| Botanical Name: | Hibiscus calyphyllus |
Plant Characteristics
Basic Information
- Category: Flowers
- Suitable Location: outdoor garden bed in warm, sheltered spot
- Suitable For:
- Is Weed: No
- Allergenicity: low
Environmental Needs
- Climate: {"temperatureRange":"10–35°C"}
- Hardiness: {"zones":"9–11"}
- Misting: every 2–3 days in dry climates, rarely required in humid environments
- Drainage: Fast-draining to prevent root rot.
- Soil Type: Well-draining, loamy soil with organic matter; can tolerate slightly sandy or clay soils if amended.
Maintenance Level
- Maintenance Level: moderate
- Toughness Level: moderate
- Pruning Frequency: Annually in late winter or early spring; light pruning can be done after flowering.
- Pruning Intensity: Moderate; remove up to one-third of old growth to rejuvenate the plant.
Care Details
Ideal Sunlight Coverage:
Full sun to partial shade (4–6 hours of direct sunlight daily); tolerates light shade in hot climates.
Sunlight Tolerance Tips:
Acclimate gradually to intense sunlight; protect from harsh afternoon sun; adjust placement based on seasonal light intensity.
Care Requirements
Care Difficulty
moderatemoderate
Sunlight
full sun to partial shade
Rotate plant for even growth; use sheer curtains to filter intense light; avoid direct sun during peak heat.
Watering
every 7–10 days during active growth, reduce in winter
Water thoroughly until it drains from the bottom; allow soil to dry slightly between waterings; avoid frequent shallow watering.
Soil
well-draining, loamy soil with organic matter
pH: Slightly acidic to neutral (pH 6.0–7.0).
Avoid heavy clay soils; ensure pots have drainage holes; amend with organic matter for better texture.
Temperature
Prefers warm temperatures (65–85°F or 18–29°C); thrives in tropical to subtropical climates.
Protect from frost; avoid sudden temperature swings; maintain consistent warmth for blooming.
Fertilizing
every 2–4 weeks during growing season, monthly with balanced fertilizer in winter
Dilute fertilizer to half strength; fertilize after watering to prevent root burn; avoid over-fertilizing.
Propagation
Methods
Stem cuttings or layering; stem cuttings are more common for home growers.
Step-by-Step Propagation Guide
- Take 4–6 inch cuttings.
- Remove lower leaves.
- Dip in rooting hormone.
- Plant in medium.
- Keep moist.
Best Time: Spring or early summer when the plant is actively growing.
Environment
Warm (70–75°F or 21–24°C), humid, and bright indirect light.
Medium
Well-draining mix of peat, perlite, and sand; can also root in water.
Hormone
Rooting hormone is recommended to improve success rates.
Timeline
Roots develop in 4–8 weeks; new growth appears in 2–3 months.
Tools Needed
Pruning shears, rooting hormone, small pots, well-draining medium.
Quick Tips
Use healthy, non-flowering stems; maintain high humidity with a plastic bag; keep out of direct sun.
Pruning & Repotting
Pruning Guide
Method
Selective thinning of branches; heading back to encourage branching.
Pruning Plan
Prune to maintain shape, encourage bushiness, and remove dead or weak growth.
Tools
Pruning shears, loppers (for larger branches), gloves.
Checklist
Sterilize tools; prune dead/damaged growth; shape the plant; clean up debris.
Repotting Guide
Best Season
Spring, before the active growing season begins.
Pot Size
One size larger pot (e.g., +2 inches in diameter); ensure good drainage.
Method
Remove plant gently; trim roots if needed; place in a slightly larger pot with fresh soil; water lightly.
Suggestions
Repot every 2–3 years or when roots fill the pot; necessary to refresh soil and provide space.
Checklist
Choose appropriate pot; prepare new soil mix; handle roots carefully; water after repotting.
Advanced Care Tips
Watering Mastery
Watering Checklist
Check soil moisture daily; water deeply; ensure drainage; adjust for season.
How to Apply Water Properly
Water directly at the root zone, ensuring even moisture distribution; water early in the morning to reduce evaporation; ensure excess water drains away to prevent waterlogging.
Watering Schedule Tips
Water deeply once the top inch of soil feels dry; increase frequency during hot, dry periods; reduce in winter to prevent root rot.
Soil Improvement
Add compost or peat moss for fertility; mix in perlite or sand for drainage; ensure aeration with organic matter.
Temperature Stress Management
Signs of Temperature Issues
Chlorosis, leaf drop, or stunted growth in cold; wilting or scorching in excessive heat.
Cold Stress
Stops flowering; leaves may turn yellow or drop; growth becomes stunted or dormant.
Solution: Move to a warmer location; provide frost protection; reduce watering in cool conditions.
Hot Stress
Leaves may wilt, scorch, or drop; flowers may fade quickly; growth slows.
Solution: Provide shade during peak heat; increase humidity; water more frequently but avoid waterlogging.
Fertilizing Guide
Fertilizing Checklist
Check fertilizer type; dilute correctly; apply during active growth; avoid winter feeding.
Fertilizing Method
Use balanced liquid fertilizer (10-10-10) every 4–6 weeks during growing season; reduce or stop in winter.
Common Problems & Solutions
Toxicity Warning
Cats
Non-toxicHibiscus calyphyllus is not considered toxic to cats. There are no documented cases of toxicity in felines after ingestion or contact with this plant.
⚡ Toxic If:
Generally non-toxic
Dogs
Non-toxicHibiscus calyphyllus is not considered toxic to dogs. There are no documented cases of toxicity in canines after ingestion or contact with this plant.
⚡ Toxic If:
Generally non-toxic
Humans
Non-toxicHibiscus calyphyllus is not considered toxic to humans under normal circumstances. It is often used in traditional medicine and as an ornamental plant without reported adverse effects.
⚡ Toxic If:
Generally non-toxic
Frequently Asked Questions
Q: How often should Hibiscus calyphyllus be watered?
A: Water moderately, allowing the soil to dry slightly between waterings.
Q: Does Hibiscus calyphyllus require full sun?
A: Yes, it thrives in full sun to partial shade.
Q: Is Hibiscus calyphyllus pet-friendly?
A: Yes, it is non-toxic to dogs and cats.
Quick Reference
| Family: | Malvaceae |
| Care: | moderate |
| Light: | full sun to partial shade |
| Water: | every 7–10 days during activ |
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