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How to Grow Sempervivum 'Mahogany'

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Sempervivum 'Mahogany'

Sempervivum tectorum 'Mahogany'

succulent

Sempervivum 'Mahogany' is a hardy evergreen succulent known for its striking deep reddish-brown foliage that intensifies in color during cooler months. This compact rosette-forming plant produces fleshy leaves and pink to red flowers in summer, making it an attractive addition to rock gardens, containers, and green roofs. It is extremely cold-hardy and drought-tolerant once established.

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Example Sempervivum 'Mahogany' timeline · Pittsburgh, PA (Zone 6b)

  1. Plant Sempervivum 'Mahogany'

    Around Apr 17

    Near Pittsburgh's average last spring frost.

  2. Tend & protect

    Late spring–summer

    Watering, feeding, and pest-watch reminders.

  3. Harvest Sempervivum 'Mahogany'

    Late summer into fall

    Before the first fall frost (≈ Nov 8)

Sample dates for Pittsburgh, PA. Sign up to get exact Sempervivum 'Mahogany' dates for your own zip code.

Growing Conditions

☀️
Sun: Full sun, 6+ hours daily; partial shade tolerated but reduces color intensity
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Water: Drought-tolerant once established. Water sparingly during growing season; reduce significantly in winter. Overwatering is the primary cause of failure. Allow soil to dry completely between waterings.
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Spacing: 6-12 inches
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Days to maturity: Mature rosettes form in 1-2 years; flowering occurs after 3+ years
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Planting depth: Plant at soil level; do not bury the rosette crown

Soil

Type: Well-draining gritty soil, sandy or rocky loam
pH: 6.0-7.5
Amendments:
Coarse sand or perlite Gravel or small rocks Compost (minimal, 10-20% of mix) Pumice

Growing Zones

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Thrives in zones 3-8; exceptionally cold-hardy and can survive harsh winters

3a 3b 4a 4b 5a 5b 6a 6b 7a 7b 8a 8b

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Growth Stages

1

Establishment

2-4 weeks

Young rosettes begin to form with small leaves clustered tightly. Plant is establishing roots in the new location.

Water minimally but consistently for the first 2-3 weeks. Ensure excellent drainage. Protect from excessive moisture.

2

Vegetative Growth

Several months to 1-2 years

Rosette expands gradually, leaves become more vibrant, and the deep mahogany color develops, especially in cooler weather. Plant may produce small offsets around the base.

Maintain sparse watering schedule. Allow full sun exposure for best color. Remove dead or damaged outer leaves. No fertilizer needed.

3

Maturation

1-2 years

Rosette reaches full size (3-4 inches diameter), displaying rich mahogany tones. Plant becomes woody at the base and produces numerous small offset rosettes.

Continue drought conditions. Separate offsets if desired. Prepare for flowering in the following season.

4

Flowering

4-6 weeks

A central flower stalk emerges from the rosette crown, bearing clusters of pink to red star-shaped flowers. This typically occurs in mid to late summer.

Do not disturb the flowering rosette. Allow blooms to develop naturally. The main rosette will die after flowering, but offsets will persist.

5

Post-Flowering & Dormancy

Fall through early spring

Flowering rosette declines and eventually dies back. Offsets continue growing and expand. Plant enters winter dormancy with intensified mahogany coloration.

Remove the dead flowering rosette to improve appearance. Cease watering. Protect young offsets from heavy snow cover if in extremely harsh climates.

Companion Planting

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Plant with:

Sedum (various species) Echeveria Jovibarba Delosperma (ice plant) Armeria (thrift) Festuca glauca (blue fescue) Dianthus Phlox subulata Silene schafta

Avoid planting near:

Water-loving plants (hostas, ferns) High-moisture perennials Tall plants that shade the area Plants requiring frequent fertilization

Common Pests

  • Prevention is key: ensure excellent drainage, reduce watering, repot in fresh gritty soil if infection occurs. Remove and discard severely affected plants.

  • Improve air circulation, reduce overhead watering, remove affected foliage. Fungicide sprays rarely necessary if drainage and air flow are improved.

  • Increase humidity slightly if severe, spray with water, or use insecticidal soap. Usually not a major issue in outdoor cultivation.

  • Remove with a cotton swab dipped in rubbing alcohol, spray with neem oil or insecticidal soap if infestation spreads.

Uses

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Low-Maintenance Ornamental Landscaping

Household

Sempervivum 'Mahogany' is ideal for rock gardens, containers, green roofs, and xeriscaping due to its extreme drought tolerance and minimal care requirements once established. Its striking year-round color makes it a living ornamental accent. [source]

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Container & Living Art

Craft

The compact rosette form and vibrant mahogany hues make this succulent popular for creating living wreaths, shallow containers, alpine troughs, and decorative terrariums. Its long lifespan and color retention provide lasting visual interest. [source]

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Pollinator Support

Wildlife

The summer flowers attract bees, butterflies, and other pollinators, providing a food source during the growing season. This makes it valuable in wildlife gardens and pollinator-friendly landscaping schemes. [source]

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Green Roof & Living Walls

Household

Sempervivum species are industry standard plants for extensive green roofs and living wall systems due to their extreme hardiness, drought tolerance, and shallow root systems. 'Mahogany' adds color contrast to these installations. [source]

💊

Traditional Herbal Use

Medicinal

Historically, Sempervivum has been used in folk medicine for skin ailments and minor wounds; the succulent leaves contain mucilaginous compounds. Modern research is limited, but traditional application includes poulticing. [source]

This is not medical advice. LizPlants is not a medical resource. Always consult a qualified healthcare professional before using plants medicinally.

Harvest Tips

Sempervivum is not harvested for consumption. For propagation, separate offset rosettes in spring or early summer using a clean knife; allow cut ends to dry for 1-2 days before planting in gritty soil. Collect seeds from flower stalks after blooming and sow on well-draining seed mix in spring.

Fun Facts

  • 🌱 The common name 'hens and chicks' comes from the main rosette (hen) and the smaller offset rosettes (chicks) that cluster around it.
  • 🌱 Sempervivum 'Mahogany' intensifies its dramatic reddish-brown coloration in autumn and winter, partly as a natural sunscreen against UV radiation and cold stress.
  • 🌱 The genus name Sempervivum comes from Latin 'semper' (always) and 'vivus' (living), reflecting its evergreen nature and hardy reputation—it was historically planted on thatched roofs for protection against lightning.

Gardening Terms

New to gardening? Learn about terms used in this guide:

Crown Full Sun Partial Shade
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