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PlantSnap
Plant Care
Sweet alyssum
(Lobularia maritima)
Also Known As
Sweet alyssum, Alyssum, Royal carpet, Alison
About This Plant
Lobularia maritima is a species of flowering plant in the family Brassicaceae, native to the Mediterranean region. It is an annual or short-lived perennial herbaceous plant that grows up to 20 cm (8 inches) tall and 30 cm (12 inches) wide. The plant produces clusters of small, fragrant, white flowers that bloom from late spring to early fall.
Plant Care Instructions
Outdoor Size Range
6-12 inches (15-30 cm)
Light Requirements
Sweet alyssum prefers full sun to partial shade, and can tolerate a wide range of light conditions.
Humidity Needs
Sweet alyssum prefers moderate humidity levels, but can tolerate low humidity.
Fertilizing Schedule
Fertilize the plant once a month with a balanced fertilizer.
Pruning Guidelines
Deadhead the plant regularly to promote continuous blooming. Cut back the plant after the first flush of flowers to encourage new growth and more blooms.
Common Pests and Diseases
Sweet alyssum is relatively pest and disease-free, but can be susceptible to aphids, spider mites, and whiteflies.
Indoor Size Range
6-8 inches (15-20 cm)
Watering Schedule
Water the plant regularly, keeping the soil moist but not waterlogged. Allow the soil to dry out slightly between watering.
Temperature Range
The plant prefers cool temperatures between 50-75°F (10-24°C), but can tolerate higher temperatures.
Growing Season
Sweet alyssum is a cool season annual that can be grown in the spring and fall in most regions. In warmer regions, it can be grown in the winter.
Growing Difficulty Level
Sweet alyssum is easy to grow and is a great plant for beginners.
USDA Hardiness Zones
Sweet alyssum is hardy in USDA zones 6-9.
Did You Know?
The common name 'Sweet alyssum' is derived from the Greek word 'lyssa', meaning 'rage' or 'madness', because the plant was believed to cure rabies.
