Rosemary 'Salvia rosmarinus' (seeds by weight)

Key Characteristics

• Origin: Rosemary, now botanically classified as *Salvia rosmarinus* (formerly *Rosmarinus officinalis*), is an evergreen shrub native to the Mediterranean region. It has been valued for centuries for its aromatic, culinary, and medicinal properties and has been introduced and cultivated worldwide.
• Patent Status: As a widely naturalized species and older cultivated forms, *Salvia rosmarinus* is not patented. Specific, more recently developed cultivars for enhanced traits might have plant variety protection in some regions.
• Leaf Production: Rosemary is known for its highly aromatic, needle-like leaves, typically gray-green in color. The leaves are about 0.5 to 1.5 inches long and contain essential oils that give rosemary its distinctive piney, pungent, and slightly peppery flavor and fragrance.
• Growth Habit: It is a generally erect, rounded, and bushy evergreen shrub that can range in height from 2 to 6 feet (0.6 to 1.8 meters) and spread 2 to 4 feet (0.6 to 1.2 meters), depending on the cultivar and growing conditions. Some varieties have a more prostrate or trailing habit.
• Flowering Time: Rosemary typically blooms in spring and summer, producing small, two-lipped flowers in clusters along the stems. The flowers are usually pale blue to white, but can also be pink or purple. The flowers are attractive to bees and other pollinators.
• Hardiness: Rosemary is generally hardy in USDA Zones 8 through 10, tolerating temperatures down to about 20°F (-6°C). Some hardier cultivars, like 'Arp' and 'Madeline Hill', can survive in Zone 7 with protection, and potentially Zone 6 in milder conditions. In colder regions (like much of the United States), it is often grown in containers and brought indoors for the winter. Given your location in the United States, hardiness will depend on your specific zone.
• Pollination: The flowers are primarily pollinated by bees and other insects.
• Growing Conditions:
  • Sunlight: Requires full sun (at least 6-8 hours of direct sunlight daily) for optimal growth, flowering, and fragrance. Insufficient light can lead to leggy and weak growth.
  • Soil: Thrives in light, well-drained soil, including sandy or loamy types. It prefers a slightly acidic to neutral pH (6.0-7.0) but can tolerate alkaline soils. Good drainage is crucial as rosemary is susceptible to root rot in heavy, waterlogged soils. Raised beds or containers are recommended in areas with poor drainage.
  • Watering: Once established, rosemary is quite drought-tolerant. Water sparingly, allowing the top 1-2 inches of soil to dry out between waterings. Overwatering is a common cause of problems, especially root rot. Container-grown rosemary will need more frequent watering than plants in the ground, especially during hot summer months.
  • Fertilizing: Generally does not require heavy fertilization and can thrive in poor soils. Avoid high-nitrogen fertilizers. Container-grown plants can benefit from a balanced liquid fertilizer annually after flowering.
  • Spacing: Space plants 2 to 3 feet (60-90 cm) apart to allow for their mature spread and ensure good air circulation, which helps prevent fungal diseases like powdery mildew, especially in humid conditions.
  • Pruning: Prune lightly after flowering each year to maintain a compact shape, encourage bushier growth, and remove any dead or woody stems. Avoid cutting back into old wood, as it may not regrow. Rosemary can also be pruned into various shapes, including topiary.
  • Propagation: Rosemary is typically propagated by cuttings (semi-ripe cuttings in late summer or heel cuttings in spring are common methods). It can also be grown from seeds, although germination rates can be low and slow. Layering is another propagation method.
• Uses: Rosemary is a versatile plant with numerous applications:
  • Culinary: The leaves, fresh or dried, are widely used to flavor meats (especially lamb, pork, and chicken), poultry, fish, vegetables, soups, stews, sauces, marinades, and baked goods like focaccia and bread. The twigs can be used as skewers for grilling. Even the flowers are edible and can be used in salads or as garnishes.
  • Medicinal: Traditionally used for its potential benefits in improving memory and concentration, relieving muscle pain, boosting the immune and circulatory systems, and promoting hair growth. Research suggests it has antioxidant, anti-inflammatory, antimicrobial, and potential neuroprotective properties. It has been used to alleviate symptoms of indigestion, headaches, and nervous disorders. (Note: Consult a healthcare professional for medicinal use).
  • Aromatic: The fragrant leaves are used in potpourri, sachets, and natural insect repellents. Rosemary essential oil is used in aromatherapy for its stimulating and memory-enhancing properties and in cosmetics for its potential benefits for skin and hair.
  • Ornamental: Its evergreen foliage and attractive flowers make it a popular ornamental plant in gardens, borders, and containers. It is also used in herb gardens and rock gardens. Some varieties have interesting growth habits, like trailing rosemary, which is excellent for hanging baskets and ground cover.
  • Attracting Pollinators: The flowers attract bees, butterflies, and other beneficial insects.
  • Pest Repellent: The strong scent can help repel certain garden pests like carrot flies and Japanese beetles, making it a useful companion plant in vegetable gardens. It is also considered deer and rabbit resistant.
• Wildlife Value: The flowers attract pollinators, supporting garden biodiversity. Rosemary is also deer and rabbit resistant.
• Ornamental Value: Its evergreen, needle-like foliage provides year-round interest, and the flowers add beauty in spring and summer. Different cultivars offer variations in growth habit and flower color.
• Potential Issues: Susceptible to root rot in poorly drained, overly wet soils. Can suffer from powdery mildew, especially in humid conditions with poor air circulation. Pests like aphids and whiteflies can occasionally be a problem, particularly on indoor plants. Rosemary generally does not recover well from heavy pruning.
• Varieties: Numerous cultivars of rosemary exist, offering variations in size, growth habit (upright, prostrate), leaf color, flower color (blue, pink, white), and aroma. Some popular varieties include 'Arp' (cold-hardy), 'Tuscan Blue' (upright with deep blue flowers), 'Prostratus' (trailing), and 'Golden Rain' (variegated foliage).