Lobel's Broom
genista lobelii
Also known as: ["Lobel's Genista"]
Overview
A deciduous shrub native to the Mediterranean region, characterized by its yellow flowers and spiny stems.
Benefits & Perks
["fragrant flowers","wildlife attractant (bees, butterflies, birds)","drought tolerant"]
Botanical Classification
| Phylum: | Magnoliophyta |
| Class: | Magnoliopsida |
| Order: | Fabales |
| Family: | Fabaceae |
| Genus: | Genista |
| Botanical Name: | Genista lobelii |
Plant Characteristics
Basic Information
- Category: Shrubs
- Suitable Location: rock garden, sunny border, or container in a sunny spot
- Suitable For:
- Is Weed: No
- Allergenicity: low
Environmental Needs
- Climate: {"temperatureRange":"5–30°C"}
- Hardiness: {"zones":"7–9"}
- Misting: rarely required, only if ambient humidity is very low
- Drainage: Fast-draining to prevent waterlogging.
- Soil Type: Well-draining, slightly alkaline soil; a mix of cactus soil, perlite, and a small amount of compost works well.
Maintenance Level
- Maintenance Level: moderate
- Toughness Level: moderate
- Pruning Frequency: Annually after flowering; light pruning can be done as needed to remove dead or damaged stems.
- Pruning Intensity: Moderate; remove up to one-third of the oldest stems to rejuvenate growth.
Care Details
Ideal Sunlight Coverage:
Full sun (6–8 hours of direct sunlight daily); tolerates partial shade but may become leggy with insufficient light.
Sunlight Tolerance Tips:
Acclimate gradually if moving from shade to sun; protect from intense midday sun in summer; ensure good air circulation to prevent fungal issues.
Care Requirements
Care Difficulty
moderatemoderate
Sunlight
full sun
Rotate plant weekly for even growth; use sheer curtains to filter harsh sunlight; place outdoors in summer for optimal light.
Watering
every 7–10 days during active growth, reduce in winter
Water thoroughly but infrequently; ensure soil dries out between waterings; avoid overwatering to prevent root rot.
Soil
well-drained, sandy or loamy soil
pH: 6.0–7.5 (slightly acidic to slightly alkaline).
Use a well-draining mix; avoid heavy clay soils; ensure pots have drainage holes; top-dress with compost annually.
Temperature
Prefers cool to moderate temperatures (60–75°F / 15–24°C); can tolerate cooler temperatures down to 50°F / 10°C but avoid frost.
Protect from frost; ensure good air circulation in hot weather; avoid placing near heat sources or drafty windows.
Fertilizing
every 4–6 weeks during spring and summer
Apply fertilizer after watering to prevent root burn; flush soil occasionally to prevent salt buildup; reduce feeding in dormant periods.
Propagation
Methods
Stem cuttings taken from semi-hardwood growth; can also be propagated by layering.
Step-by-Step Propagation Guide
- Take 4–6 inch cuttings.
- Remove lower leaves.
- Dip in rooting hormone.
- Plant in medium.
- Keep moist and warm.
Best Time: Late spring to early summer when the plant is actively growing.
Environment
Warm (70–75°F / 21–24°C), humid environment with indirect light; protect from direct sun.
Medium
Well-draining mix of perlite and peat moss or cactus mix.
Hormone
Rooting hormone is recommended to improve success rates.
Timeline
Roots typically form in 4–8 weeks; new growth may appear in 2–3 months.
Tools Needed
Pruning shears, rooting hormone, small pots, well-draining medium, plastic wrap or propagator.
Quick Tips
Use sharp, clean tools to prevent infection; maintain consistent moisture; provide bottom heat if possible.
Pruning & Repotting
Pruning Guide
Method
Use clean, sharp tools; cut just above a leaf node or bud; remove crossing or crowded branches.
Pruning Plan
Prune to maintain shape, encourage bushiness, and remove dead or weak growth; best done after flowering or in late winter.
Tools
Pruning shears, loppers (for larger stems), sterilizing solution.
Checklist
Sterilize tools; prune at the right time; make clean cuts; remove dead or diseased wood; shape the plant.
Repotting Guide
Best Season
Early spring before the active growth period begins.
Pot Size
Increase pot size by 1–2 inches in diameter; ensure the new pot has drainage holes.
Method
Remove the plant gently; trim any dead roots; place in a slightly larger pot with fresh, well-draining soil; water lightly after repotting.
Suggestions
Repot every 2–3 years or when the plant becomes root-bound; necessary to refresh soil and provide space for growth.
Checklist
Choose the right pot size; prepare fresh soil mix; handle roots carefully; water after repotting; place in a shaded area for a few days.
Advanced Care Tips
Watering Mastery
Watering Checklist
Check soil moisture before watering; water deeply at the base; ensure proper drainage; adjust frequency by season.
How to Apply Water Properly
Water directly at the root zone until water drains from the bottom; ensure even moisture without waterlogging; water in the morning to allow foliage to dry.
Watering Schedule Tips
Water deeply once every 7–10 days during active growth in spring and summer; reduce frequency to every 3–4 weeks in fall and winter, allowing soil to dry completely between waterings.
Soil Improvement
Add perlite or coarse sand to improve drainage; incorporate organic matter like compost for fertility; ensure soil is loose and airy.
Temperature Stress Management
Signs of Temperature Issues
Wilting, yellowing leaves, or leaf drop in excessive heat; stunted growth or browning leaf edges in cold stress.
Cold Stress
Low temperatures slow growth and can cause root damage; prolonged exposure to frost may kill the plant.
Solution: Move to a sheltered location or indoors before frost; provide a layer of mulch to insulate roots; avoid overwatering in cold conditions.
Hot Stress
Excessive heat can lead to dehydration, leaf scorch, or wilting; may drop leaves to conserve water.
Solution: Provide shade during peak heat; increase watering frequency; mist foliage lightly in the evening to cool the plant.
Fertilizing Guide
Fertilizing Checklist
Use diluted fertilizer; fertilize during active growth; avoid over-fertilization; stop in winter.
Fertilizing Method
Use a balanced, water-soluble fertilizer diluted to half strength every 4–6 weeks during spring and summer; avoid fertilizing in fall and winter.
Common Problems & Solutions
Toxicity Warning
Cats
ToxicGenista lobelii is toxic to cats due to the presence of cytisine, which can disrupt normal neurological and gastrointestinal functions. Cats are particularly sensitive to such compounds, and ingestion can result in serious health complications.
⚠️ Symptoms:
🌿 Toxic Parts:
⚡ Toxic If:
if eaten
Dogs
ToxicThe toxic principles in Genista lobelii, particularly cytisine, can cause severe poisoning in dogs. The compound interferes with the nervous system, leading to a range of adverse effects from gastrointestinal upset to neurological symptoms.
⚠️ Symptoms:
🌿 Toxic Parts:
⚡ Toxic If:
if eaten
Humans
ToxicGenista lobelii contains toxic compounds, primarily cytisine, which acts as a nicotinic acetylcholine receptor agonist. Ingestion can lead to significant physiological disturbances, including neuromuscular effects and potential systemic toxicity.
⚠️ Symptoms:
🌿 Toxic Parts:
⚡ Toxic If:
if eaten
Frequently Asked Questions
Q: Is Genista lobelii toxic to pets?
A: Yes, it is toxic to both dogs and cats.
Q: Does Genista lobelii attract wildlife?
A: Yes, it attracts bees, butterflies, and birds.
Q: Is Genista lobelii drought tolerant?
A: Yes, it is drought tolerant once established.
Quick Reference
| Family: | Fabaceae |
| Care: | moderate |
| Light: | full sun |
| Water: | every 7–10 days during activ |
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