Crimson Bottlebrush
callistemon citrinus
Also known as: ["Bottlebrush","Red Bottlebrush"]
Overview
An evergreen shrub native to Australia, known for its distinctive crimson flower spikes that resemble bottle brushes.
Benefits & Perks
["long-flowering","wildlife attractant (bees, butterflies, birds)","fragrant flowers"]
Botanical Classification
| Phylum: | Magnoliophyta |
| Class: | Magnoliopsida |
| Order: | Myrtales |
| Family: | Myrtaceae |
| Genus: | Callistemon |
| Botanical Name: | Callistemon citrinus |
Plant Characteristics
Basic Information
- Category: Flowers
- Suitable Location: outdoor garden bed in a sunny spot, or large container in a sheltered area
- Suitable For:
- Is Weed: No
- Allergenicity: low
Environmental Needs
- Climate: {"temperatureRange":"7–35°C"}
- Hardiness: {"zones":"9–11"}
- Misting: rarely required, only if ambient humidity is very low
- Drainage: Fast-draining to prevent root rot.
- Soil Type: Well-draining, slightly acidic soil with organic matter; cactus or succulent mix works well.
Maintenance Level
- Maintenance Level: moderate
- Toughness Level: moderate
- Pruning Frequency: Annually after flowering; light pruning can be done as needed to maintain shape.
- Pruning Intensity: Moderate; remove up to one-third of old growth to rejuvenate the plant.
Care Details
Ideal Sunlight Coverage:
Full sun (6–8 hours of direct sunlight daily); tolerates partial shade but blooms best in full sun.
Sunlight Tolerance Tips:
Acclimate plants gradually to intense sunlight; protect from harsh afternoon sun in hot climates; ensure good air circulation to prevent fungal issues.
Care Requirements
Care Difficulty
moderatemoderate
Sunlight
full sun to partial shade
Rotate plant for even light exposure; use sheer curtains to filter intense sun; avoid placing in shaded corners.
Watering
every 7–10 days during active growth, less frequently in winter
Water thoroughly until it drains from the bottom; allow soil to dry between waterings; avoid overwatering.
Soil
well-draining, slightly acidic soil with good organic matter
pH: 5.5–6.5 (slightly acidic).
Use a mix with good aeration; avoid heavy clay soils; ensure pots have drainage holes.
Temperature
Prefers 65–80°F (18–27°C); tolerates mild frosts but thrives in warm, temperate climates.
Avoid sudden temperature changes; protect from drafts; maintain consistent warmth for best growth.
Fertilizing
every 4–6 weeks during spring and summer
Fertilize after pruning; use a fertilizer with higher phosphorus for blooming; flush soil occasionally to prevent salt buildup.
Propagation
Methods
Stem cuttings taken from new growth; can also be propagated by seed, though cuttings are more reliable.
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, humid environment with indirect light; maintain consistent moisture.
Medium
Well-draining mix of perlite and peat moss or cactus mix.
Hormone
Rooting hormone is recommended to improve success rates.
Timeline
Roots develop in 4–8 weeks; establish in new pot after 3–6 months.
Tools Needed
Pruning shears, rooting hormone, small pots, misting spray bottle.
Quick Tips
Use healthy, non-flowering stems; maintain high humidity with a plastic cover; avoid direct sunlight.
Pruning & Repotting
Pruning Guide
Method
Use clean, sharp tools; cut just above a leaf node or bud; avoid cutting into old wood.
Pruning Plan
Prune to shape the plant, encourage bushiness, and remove dead or diseased wood; best done after flowering.
Tools
Pruning shears, loppers, gloves, disinfectant.
Checklist
Disinfect tools; prune after flowering; remove dead/diseased wood; shape evenly.
Repotting Guide
Best Season
Early spring before new growth begins.
Pot Size
Increase pot size by 2–3 inches in diameter; ensure good drainage holes.
Method
Remove plant gently; trim roots if necessary; place in new pot with fresh soil; water thoroughly.
Suggestions
Repot every 2–3 years or when roots fill the pot; beneficial for younger plants to encourage growth.
Checklist
Check root bound status; prepare new pot with drainage; use fresh potting mix; water after repotting.
Advanced Care Tips
Watering Mastery
Watering Checklist
Check soil moisture; water deeply; ensure drainage; adjust for season.
How to Apply Water Properly
Water at the base of the plant, ensuring moisture reaches the root zone; water early in the day to minimize evaporation; ensure excess water drains away to prevent waterlogging.
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 soil is loose and airy.
Temperature Stress Management
Signs of Temperature Issues
Leaf drop, stunted growth, or browning leaf tips in cold; wilting or scorched leaves in excessive heat.
Cold Stress
Slows growth, may cause leaf drop or dieback; susceptible to frost damage in temperatures below 28°F (-2°C).
Solution: Protect with frost cloth in cold spells; plant in a sheltered location; avoid overwatering in cold weather.
Hot Stress
Wilting, leaf scorch, or reduced flowering due to excessive heat and dry conditions.
Solution: Provide shade during peak heat; increase watering frequency; mulch to retain soil moisture.
Fertilizing Guide
Fertilizing Checklist
Check fertilizer type; follow dilution instructions; apply during active growth; avoid winter feeding.
Fertilizing Method
Use a balanced, slow-release fertilizer in spring; dilute liquid fertilizer to half-strength monthly during growing season; avoid fertilizing in winter.
Common Problems & Solutions
Toxicity Warning
Cats
Non-toxicCallistemon citrinus is not toxic to cats. There are no known toxic effects or physiological impacts associated with ingestion or contact.
🌿 Toxic Parts:
⚡ Toxic If:
if eaten
Dogs
Non-toxicCallistemon citrinus is not toxic to dogs. There are no documented adverse effects from ingestion or contact with this plant.
🌿 Toxic Parts:
⚡ Toxic If:
if eaten
Humans
Non-toxicCallistemon citrinus is generally considered non-toxic to humans. There are no known toxic effects or physiological impacts associated with ingestion or contact.
🌿 Toxic Parts:
⚡ Toxic If:
if eaten
Frequently Asked Questions
Q: How often should I water Callistemon citrinus?
A: Water deeply but infrequently, allowing the soil to dry slightly between waterings.
Q: Does Callistemon citrinus attract wildlife?
A: Yes, it is highly attractive to bees, butterflies, and birds due to its nectar-rich flowers.
Q: Is Callistemon citrinus toxic to pets?
A: No, it is non-toxic to dogs and cats.
Quick Reference
| Family: | Myrtaceae |
| Care: | moderate |
| Light: | full sun to partial shade |
| Water: | every 7–10 days during activ |
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