Alpine Stonecrop
sedum atratum
Also known as: ["Alpine Sedum","Red Stonecrop"]
Overview
A low-growing succulent with fleshy, reddish leaves and star-shaped yellow flowers, native to alpine regions.
Benefits & Perks
["drought tolerant","deer resistant","wildlife attractant (bees, butterflies, birds)","low maintenance","aesthetic foliage"]
Botanical Classification
| Phylum: | Magnoliophyta |
| Class: | Magnoliopsida |
| Order: | Saxifragales |
| Family: | Crassulaceae |
| Genus: | Sedum |
| Botanical Name: | Sedum atratum |
Plant Characteristics
Basic Information
- Category: Succulents & Cacti
- Suitable Location: rock gardens, alpine troughs, or sunny borders
- Suitable For:
- Is Weed: No
- Allergenicity: low
Environmental Needs
- Climate: {"temperatureRange":"–12–30°C"}
- Hardiness: {"zones":"4–8"}
- Misting: rarely required, only if ambient humidity is very low
- Drainage: Fast-draining to prevent waterlogging.
- Soil Type: Well-draining, sandy soil with some organic matter; cactus or succulent mix is ideal.
Maintenance Level
- Maintenance Level: very low
- Toughness Level: high
- Pruning Frequency: As needed, typically every 2–3 months or after flowering.
- Pruning Intensity: Light to moderate; avoid heavy pruning unless necessary to control size.
Care Details
Ideal Sunlight Coverage:
Bright indirect light for 4–6 hours daily; can tolerate full sun but may need acclimation to avoid scorching.
Sunlight Tolerance Tips:
Acclimate gradually to intense sunlight; protect from harsh midday sun; adjust placement based on seasonal light changes.
Care Requirements
Care Difficulty
easyeasy
Sunlight
full sun to partial shade
Rotate plant weekly for even growth; provide shade during peak summer hours; avoid direct afternoon sun in hot climates.
Watering
every 7–10 days during active growth, less frequently in winter
Water deeply but infrequently; ensure soil dries out fully between waterings; avoid overwatering to prevent root rot.
Soil
well-draining, sandy or rocky soil
pH: Slightly acidic to neutral (pH 6.0–7.0).
Use a mix of cactus soil and perlite; avoid heavy garden soil; ensure pots drain well.
Temperature
Prefers 60–75°F (15–24°C); tolerates cooler temperatures but avoid prolonged exposure below 50°F (10°C).
Avoid sudden temperature fluctuations; protect from frost; ensure good air circulation in warm conditions.
Fertilizing
every 4–6 weeks during spring and summer, none in fall and winter
Dilute fertilizer to half strength; apply to moist soil to prevent root burn; stop fertilizing in winter.
Propagation
Methods
Stem cuttings or leaf cuttings; both methods are effective and straightforward.
Step-by-Step Propagation Guide
- Take a healthy cutting.
- Let it callus for a day or two.
- Plant in moist propagation medium.
- Keep warm and humid.
Best Time: Spring or early summer when the plant is actively growing.
Environment
Warm, humid environment with indirect light; maintain consistent moisture in the medium.
Medium
Well-draining mix like cactus soil or perlite and peat moss.
Hormone
Optional but can speed up rooting; rooting hormone powder is recommended for faster results.
Timeline
Roots typically form in 2–4 weeks; new growth appears in 4–8 weeks.
Tools Needed
Sharp scissors or knife, rooting hormone (optional), small pots, well-draining soil mix.
Quick Tips
Allow cuttings to callus before planting; maintain high humidity with a plastic cover; use bright but indirect light.
Pruning & Repotting
Pruning Guide
Method
Trim back leggy stems to encourage branching; remove dead or yellowing leaves.
Pruning Plan
Prune to maintain shape, encourage bushier growth, and remove any dead or damaged stems.
Tools
Clean, sharp scissors or pruning shears.
Checklist
Use clean tools; prune during active growth; remove only dead or overgrown parts; avoid cutting into old wood.
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
Gently remove the plant; 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; beneficial for growth and health.
Checklist
Choose a pot with drainage holes; use fresh soil mix; handle roots gently; water sparingly after repotting.
Advanced Care Tips
Watering Mastery
Watering Checklist
Check soil moisture with a finger; water when dry to the touch; ensure excess water drains away; reduce winter watering.
How to Apply Water Properly
Water directly at the root zone until water drains from the bottom; ensure thorough saturation without pooling; water in the morning to allow foliage to dry.
Watering Schedule Tips
Water sparingly, allowing soil to dry completely between waterings. Reduce frequency in winter to once every 4–6 weeks.
Soil Improvement
Add perlite or coarse sand to improve drainage; incorporate compost for organic matter; ensure pots have drainage holes.
Temperature Stress Management
Signs of Temperature Issues
Wilting, leaf drop, or discoloration (yellowing or browning) due to extreme heat or cold.
Cold Stress
Slows growth and can cause leaf damage or dieback if exposed to freezing temperatures.
Solution: Move to a warmer location; protect from drafts; use a heat mat if necessary during winter.
Hot Stress
Leaves may wilt, curl, or develop sunburn spots if exposed to excessive heat without adequate water.
Solution: Provide shade during peak heat; increase humidity; water more frequently but still allow soil to dry between waterings.
Fertilizing Guide
Fertilizing Checklist
Use balanced fertilizer; dilute properly; apply during active growth; avoid winter feeding.
Fertilizing Method
Use a balanced, diluted liquid fertilizer every 4–6 weeks during growing season (spring/summer); avoid fertilizing in fall/winter.
Common Problems & Solutions
Toxicity Warning
Cats
Non-toxicSedum atratum is not known to be toxic to cats. It does not pose a significant risk if ingested.
⚠️ Symptoms:
🌿 Toxic Parts:
⚡ Toxic If:
if eaten
Dogs
Non-toxicSedum atratum is not known to be toxic to dogs. It does not pose a significant risk if ingested.
⚠️ Symptoms:
🌿 Toxic Parts:
⚡ Toxic If:
if eaten
Humans
Non-toxicSedum atratum is not known to have toxic effects on humans. It is generally considered safe for consumption in small quantities.
⚠️ Symptoms:
🌿 Toxic Parts:
⚡ Toxic If:
if eaten
Frequently Asked Questions
Q: How often should I water Sedum atratum?
A: Water sparingly, allowing the soil to dry completely between waterings, as it is drought-tolerant.
Q: Does Sedum atratum attract wildlife?
A: Yes, it attracts bees and butterflies with its flowers.
Q: Can Sedum atratum be grown indoors?
A: While possible, it thrives best in outdoor, sunny, well-drained locations.
Quick Reference
| Family: | Crassulaceae |
| Care: | easy |
| Light: | full sun to partial shade |
| Water: | every 7–10 days during activ |
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