Salvia nemerosa 'Ostfriesland'

Overview of Salvia nemorosa 'Ostfriesland'

Salvia nemorosa 'Ostfriesland', commonly known as East Friesland Sage, is a popular perennial prized for its vibrant violet-blue flower spikes and aromatic foliage. This hardy plant is known for its long blooming period, extending from late spring to early autumn, and its ability to attract pollinators such as bees and butterflies. 'Ostfriesland' is a versatile addition to various garden settings, including borders, beds, and containers. It’s also valued for its low maintenance requirements and drought tolerance once established.

Key Characteristics

• Scientific Name: Salvia nemorosa 'Ostfriesland'
• Common Name: East Friesland Sage
• Family: Lamiaceae
• Origin: Europe
• Height: 45-60 cm (18-24 inches)
• Spread: 30-45 cm (12-18 inches)
• Flower Color: Violet-blue
• Foliage Color: Green, aromatic
• Blooming Season: Late spring to early autumn
• Hardiness Zones: USDA zones 4-8

Planting and Growing Conditions

Ideal Soil and Location

• Soil Type: Prefers well-draining soil with a slightly acidic to neutral pH (6.0-7.0). Tolerant of a variety of soil types, including sandy and loamy soils.
• Sun Exposure: Thrives in full sun but can tolerate light shade. For optimal flowering and growth, provide at least 6 hours of direct sunlight daily.
• Planting Location: Suitable for garden beds, borders, rock gardens, and containers. Can also be used in mass plantings for a striking display.

Watering and Feeding

• Watering: Water regularly to keep the soil consistently moist during the first growing season. Once established, 'Ostfriesland' is moderately drought-tolerant and benefits from deep watering during prolonged dry periods.
• Feeding: Apply a balanced, slow-release fertilizer in early spring to support healthy growth and abundant flowering. Avoid over-fertilizing, which can lead to excessive foliage growth at the expense of flowers.

Temperature and Humidity

• Temperature: Hardy to temperatures down to -34°C (-30°F). Prefers temperate climates but can tolerate a wide range of temperatures.
• Humidity: Adaptable to varying humidity levels. Ensure good air circulation around the plant to reduce the risk of fungal diseases.

Maintenance and Care

Pruning and Deadheading

• Pruning: Prune in late winter or early spring to remove dead or damaged stems and encourage new growth. Cutting back the plant after the first flush of blooms can promote a second bloom later in the season.
• Deadheading: Regularly remove spent flower spikes to encourage continuous blooming and maintain a tidy appearance.

Pests and Diseases

• Common Pests: Generally resistant to pests but can occasionally be affected by aphids, spider mites, and whiteflies. Use insecticidal soap or neem oil to manage infestations.
• Diseases: Susceptible to fungal diseases such as powdery mildew and root rot in poorly drained soils. Ensure proper watering practices, good air circulation, and avoid overhead watering to minimize disease risk.

Winter Care

• In-ground Plants: In USDA zones 4-8, 'Ostfriesland' is hardy and requires minimal winter protection. Apply a layer of mulch around the base to protect the roots and conserve moisture.
• Potted Plants: Move containers to a sheltered location or indoors during severe cold spells. Reduce watering during the dormant period and avoid letting the soil dry out completely.

Propagation

• Cuttings: Take softwood cuttings in late spring or early summer. Remove lower leaves and root in a well-draining potting mix under high humidity conditions.
• Seeds: Can be grown from seed, though cuttings are preferred for maintaining the true characteristics of the hybrid. Sow seeds directly in the garden in late fall or early spring, or start indoors 6-8 weeks before the last frost date.
• Division: Can be divided in early spring or fall. Dig up the root ball and separate it into sections with at least one bud or shoot per division.

Companion Planting and Landscaping Uses

Companion Plants

• Ideal Companions: Pairs well with other sun-loving perennials such as lavender, coneflowers (Echinacea), rudbeckia, and ornamental grasses. The violet-blue flowers of 'Ostfriesland' complement plants with contrasting colors and textures.
• Arrangement: Use in mixed borders, rock gardens, or as part of a xeriscape garden. Can also be used as a low hedge or edging plant.

Landscape Uses

• Borders and Edging: Ideal for creating colorful borders and edging along pathways and garden beds.
• Rock Gardens: Suitable for rock gardens due to its tolerance of poor, rocky soils.
• Mass Plantings: Can be used in mass plantings for a bold and dramatic display of color.
• Containers: Suitable for containers on patios, balconies, and decks. Mix with other drought-tolerant plants for a vibrant container display.

Benefits and Uses

• Aesthetic Appeal: Offers vibrant violet-blue flowers and aromatic foliage, adding visual interest and fragrance to the garden.
• Low Maintenance: Easy to care for, with minimal pruning and feeding requirements. Its hardiness and adaptability make it suitable for a range of garden settings.
• Drought Tolerance: Once established, 'Ostfriesland' is moderately drought-tolerant, making it an excellent choice for xeriscaping and low-water gardens.
• Wildlife Friendly: Attracts pollinators such as bees, butterflies, and hummingbirds, supporting garden biodiversity.
• Versatile Garden Use: Suitable for various garden settings, including borders, rock gardens, and containers.

Tips for Success

• Proper Watering: Maintain consistent moisture during establishment but avoid waterlogging. Once established, water deeply and infrequently.
• Regular Feeding: Apply a balanced fertilizer in early spring to support vigorous growth and abundant blooms.
• Pruning and Maintenance: Regularly prune to maintain the plant’s shape and health. Remove any dead or diseased wood and manage pests and diseases promptly.
• Monitor for Pests and Diseases: Inspect regularly for signs of pests or diseases. Treat any issues early to prevent serious problems.

By following these care guidelines, you can enjoy the vibrant beauty and extended blooming season of Salvia nemorosa 'Ostfriesland' in your garden. This versatile and low-maintenance plant brings color and life to various garden settings, making it a valuable addition to any landscape

• Size
  2L

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