Cucumberleaf Sunflower
helianthus debilis
Also known as: ["Cucumberleaf Sunflower","Tropical Sunflower"]
Overview
A herbaceous annual plant native to North America, known for its bright yellow flowers and cucumber-scented leaves.
Benefits & Perks
["long-flowering","wildlife attractant (bees, butterflies, birds)","fast growing","aesthetic foliage"]
Botanical Classification
| Phylum: | Magnoliophyta |
| Class: | Magnoliopsida |
| Order: | Asterales |
| Family: | Asteraceae |
| Genus: | Helianthus |
| Botanical Name: | Helianthus debilis |
Plant Characteristics
Basic Information
- Category: Flowers
- Suitable Location: outdoor garden bed in open, sunny area
- Suitable For:
- Is Weed: No
- Allergenicity: low
Environmental Needs
- Climate: {"temperatureRange":"10–35°C"}
- Hardiness: {"zones":"8–11"}
- Misting: rarely required, only if ambient humidity is very low
- Drainage: Fast-draining to prevent waterlogging.
- Soil Type: Well-draining, loamy soil with added organic matter; cactus or succulent mix can work well.
Maintenance Level
- Maintenance Level: moderate
- Toughness Level: moderate
- Pruning Frequency: Light pruning every 2–3 months; major pruning in late winter or early spring.
- Pruning Intensity: Moderate; remove up to one-third of the plant if overgrown, but avoid heavy pruning during flowering
Care Details
Ideal Sunlight Coverage:
Full sun (6–8 hours of direct sunlight daily); adjust for intense summer heat by providing partial shade.
Sunlight Tolerance Tips:
Acclimate plants gradually to intense sunlight; protect from harsh midday sun in summer; ensure proper ventilation if grown indoors.
Care Requirements
Care Difficulty
easymoderate
Sunlight
full sun
Rotate plant for even growth; use sheer curtains to filter intense light; avoid placing near reflective surfaces.
Watering
every 7–10 days during active growth, reduce in winter
Water thoroughly but infrequently; ensure good drainage; avoid wetting foliage to prevent fungal issues.
Soil
well-draining, sandy loam with moderate organic content
pH: Slightly acidic to neutral (pH 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 or 18–29°C); prefers stable conditions; sensitive to frost.
Avoid sudden temperature changes; protect from drafts; maintain consistent warmth during active growth.
Fertilizing
every 4–6 weeks during growing season with balanced liquid fertilizer
Apply fertilizer after watering to prevent root burn; flush soil occasionally to prevent salt buildup; stop fertilizing before winter dormancy.
Propagation
Methods
Stem cuttings or division; stem cuttings are the most common method for home growers.
Step-by-Step Propagation Guide
- Take a 4–6 inch cutting.
- Remove lower leaves.
- Dip in rooting hormone.
- Plant in moist medium.
- Keep humid and warm.
Best Time: Spring or early summer when the plant is actively growing.
Environment
Warm (70–75°F or 21–24°C), humid, and bright but indirect light; protect from direct sun.
Medium
Well-draining mix of perlite and peat moss or cactus potting mix.
Hormone
Rooting hormone is recommended to speed up root development.
Timeline
Roots typically form in 2–4 weeks; new growth may take 6–8 weeks.
Tools Needed
Pruning shears, rooting hormone, small pots, misting bottle, plastic wrap.
Quick Tips
Use healthy, non-flowering stems; maintain high humidity; avoid overwatering.
Pruning & Repotting
Pruning Guide
Method
Pinch back tips for bushier growth; cut just above a leaf node or lateral branch.
Pruning Plan
Prune to maintain shape, encourage bushier growth, and remove dead or diseased parts.
Tools
Pruning shears, sharp knife, gloves.
Checklist
Sterilize tools; prune dead/damaged parts; shape as needed; clean up debris.
Repotting Guide
Best Season
Early spring before the active growing season begins.
Pot Size
Choose a pot one size larger (1–2 inches wider) than the current one.
Method
Remove plant gently; trim roots if necessary; place in a new pot with fresh soil; water lightly.
Suggestions
Repot every 2–3 years or when roots fill the pot; beneficial for growth and health.
Checklist
Prepare new pot with drainage; gently remove plant; trim roots if needed; add fresh soil; water lightly.
Advanced Care Tips
Watering Mastery
Watering Checklist
Check soil moisture; water deeply; ensure drainage; avoid overhead watering.
How to Apply Water Properly
Water at the base of the plant, focusing on the root zone; water until it drains from the bottom; allow soil to dry between waterings.
Watering Schedule Tips
Water deeply once 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 aeration with organic matter.
Temperature Stress Management
Signs of Temperature Issues
Wilting, yellowing leaves, stunted growth, or bud drop in extreme heat or cold.
Cold Stress
Growth slows or halts; leaves may turn purple or brown; risk of frost damage or death in freezing temperatures.
Solution: Move to a warmer location; cover with a frost cloth; avoid watering before cold nights.
Hot Stress
Leaf scorch, wilting, or drooping; reduced flowering; potential for heat stress in prolonged high temperatures.
Solution: Provide shade during peak heat; increase humidity; water deeply in the morning.
Fertilizing Guide
Fertilizing Checklist
Use diluted fertilizer; fertilize during active growth; avoid winter feeding.
Fertilizing Method
Use a balanced liquid fertilizer diluted to half strength every 4–6 weeks during the growing season (spring to early fall); avoid fertilizing in winter.
Common Problems & Solutions
Toxicity Warning
Cats
Non-toxicHelianthus debilis is not considered toxic to cats. The plant is safe for cats to be around and does not pose a significant risk if ingested in small quantities.
⚡ Toxic If:
Generally non-toxic
Dogs
Non-toxicHelianthus debilis is not considered toxic to dogs. The plant is safe for dogs to be around and does not pose a significant risk if ingested in small quantities.
⚡ Toxic If:
Generally non-toxic
Humans
Non-toxicHelianthus debilis, commonly known as beach sunflower, is not considered toxic to humans. It is often used in landscaping and is generally safe for human contact and consumption.
⚡ Toxic If:
Generally non-toxic
Frequently Asked Questions
Q: Is Helianthus debilis toxic to pets?
A: There is insufficient data on its toxicity to pets.
Q: How often should I water Helianthus debilis?
A: Water moderately, allowing the soil to dry slightly between waterings.
Q: Does Helianthus debilis attract wildlife?
A: Yes, it attracts bees, butterflies, and birds due to its nectar-rich flowers.
Quick Reference
| Family: | Asteraceae |
| Care: | easy |
| Light: | full sun |
| Water: | every 7–10 days during activ |
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