Ram's Horn Cactus
selenicereus anthonyanus
Also known as: ["Anthonyanus","Fishbone Cactus"]
Overview
A unique epiphytic cactus with intricate, fishbone-like stems and nocturnal, fragrant flowers.
Benefits & Perks
["fragrant flowers","aesthetic foliage","wildlife attractant (bees, butterflies, birds)"]
Botanical Classification
| Phylum: | Magnoliophyta |
| Class: | Magnoliopsida |
| Order: | Caryophyllales |
| Family: | Cactaceae |
| Genus: | Selenicereus |
| Botanical Name: | Selenicereus anthonyanus |
Plant Characteristics
Basic Information
- Category: Succulents & Cacti
- Suitable Location: indoor hanging basket or trellis in bright, humid room
- Suitable For:
- Is Weed: No
- Allergenicity: low
Environmental Needs
- Climate: {"temperatureRange":"18–30°C"}
- Hardiness: {"zones":"10–12"}
- Misting: every 2–3 days if ambient humidity is low
- Drainage: Fast-draining to prevent waterlogging.
- Soil Type: Well-draining cactus or succulent mix with added perlite or coarse sand.
Maintenance Level
- Maintenance Level: moderate
- Toughness Level: moderate
- Pruning Frequency: As needed, typically every 1–2 years or after flowering.
- Pruning Intensity: Moderate, removing up to one-third of the stems if necessary.
Care Details
Ideal Sunlight Coverage:
Bright indirect light for 6–8 hours daily. Can tolerate some direct morning sun but avoid harsh afternoon rays, especially in summer.
Sunlight Tolerance Tips:
Acclimate gradually to direct light; protect from intense sun to prevent scorching; place in a spot with filtered light or sheer curtains if outdoors.
Care Requirements
Care Difficulty
moderateeasy
Sunlight
bright indirect light, partial shade
Rotate plant weekly for even growth; provide shade during peak sun hours; adjust light exposure seasonally.
Watering
every 7–10 days during active growth, reduce in winter
Water thoroughly but infrequently; ensure excellent drainage; adjust frequency based on season and growth phase.
Soil
well-draining cactus or succulent mix
pH: Slightly acidic to neutral, pH 6.0–7.0.
Use unglazed clay pots for better drainage; ensure bottom drainage holes are clear; avoid heavy garden soils.
Temperature
Prefers warm temperatures between 65–85°F (18–29°C). Tolerates mild fluctuations but dislikes prolonged exposure to cold or heat extremes.
Avoid drafts; maintain stable temperatures; protect from extreme seasonal changes.
Fertilizing
every 4–6 weeks during growing season with balanced liquid fertilizer
Fertilize only during active growth; avoid over-fertilizing; flush soil occasionally to prevent salt buildup.
Propagation
Methods
Stem cuttings, preferably taken from healthy, mature segments.
Step-by-Step Propagation Guide
- Select a healthy stem segment.
- Let it callus for a few days.
- Plant in moist propagation medium.
- Maintain humidity.
Best Time: Spring or early summer when the plant is actively growing.
Environment
Warm, humid environment with indirect light and consistent moisture.
Medium
Well-draining mix of cactus soil and perlite or sand.
Hormone
Optional but recommended for faster rooting.
Timeline
Roots typically form in 2–4 weeks; new growth may appear in 1–2 months.
Tools Needed
Clean knife or scissors, rooting hormone (optional), small pots, propagation medium.
Quick Tips
Use segments with at least one node; keep soil lightly moist; avoid direct sun until roots establish.
Pruning & Repotting
Pruning Guide
Method
Cut stems cleanly just above a node or junction; avoid tearing the plant.
Pruning Plan
Prune to control size, encourage bushier growth, and remove damaged or overgrown stems.
Tools
Clean, sharp pruning shears or scissors.
Checklist
Sterilize tools; prune during active growth; dispose of cuttings properly; avoid over-pruning.
Repotting Guide
Best Season
Spring, before the active growing season begins.
Pot Size
Increase pot size by 1–2 inches (2.5–5 cm) in diameter.
Method
Remove gently from pot; trim any dead roots; repot in fresh, well-draining soil with a slightly larger pot.
Suggestions
Repot only when the plant becomes root-bound or outgrows its container, typically every 2–3 years.
Checklist
Check root boundness; prepare new pot with drainage; use fresh soil mix; water lightly after repotting.
Advanced Care Tips
Watering Mastery
Watering Checklist
Check soil dryness; water thoroughly; ensure drainage; adjust for season.
How to Apply Water Properly
Water directly at the root zone until water drains from the bottom, ensuring even moisture without waterlogging. Water in the morning to allow foliage to dry before nightfall.
Watering Schedule Tips
Water sparingly during spring and summer, allowing soil to dry completely between waterings. Reduce watering significantly in fall and winter, providing only occasional moisture to prevent root rot.
Soil Improvement
Add perlite, coarse sand, or pumice to commercial potting mixes to enhance drainage and aeration.
Temperature Stress Management
Signs of Temperature Issues
Chlorosis, stunted growth, or bud drop in cold; wilting, scorching, or leaf drop in excessive heat.
Cold Stress
Low temperatures slow growth and can cause root damage or fungal infections due to reduced metabolic activity.
Solution: Move to a warmer location; insulate pots; avoid overwatering during cold periods.
Hot Stress
Excessive heat can lead to dehydration, sunburn, and wilting, especially if combined with low humidity.
Solution: Provide shade; increase humidity with misting or a humidifier; ensure adequate watering.
Fertilizing Guide
Fertilizing Checklist
Check growth phase; use diluted fertilizer; apply during watering; stop in dormant season.
Fertilizing Method
Use a balanced, water-soluble cactus fertilizer diluted to half strength every 4–6 weeks during spring and summer. Cease fertilizing in fall and winter.
Common Problems & Solutions
Toxicity Warning
Cats
Non-toxicSelenicereus anthonyanus is not known to be toxic to cats. It does not pose a significant health risk if ingested.
⚡ Toxic If:
if eaten
Dogs
Non-toxicSelenicereus anthonyanus is not known to be toxic to dogs. It does not pose a significant health risk if ingested.
⚡ Toxic If:
if eaten
Humans
Non-toxicSelenicereus anthonyanus is not known to have any toxic effects on humans. It is generally considered safe for consumption.
⚡ Toxic If:
if eaten
Frequently Asked Questions
Q: How often should I water Selenicereus anthonyanus?
A: Water thoroughly when the top inch of soil is dry, typically every 7-10 days during growing season, reducing frequency in winter.
Q: Does this plant require direct sunlight?
A: It prefers bright, indirect light; direct sunlight can scorch its stems.
Q: Why are the leaves turning yellow?
A: Yellowing may indicate overwatering, poor drainage, or insufficient light.
Quick Reference
| Family: | Cactaceae |
| Care: | moderate |
| Light: | bright indirect light, partial |
| Water: | every 7–10 days during activ |
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