Sweet alyssum is a delicate, compact flowering plant that transforms small spaces into clouds of tiny, fragrant blooms. Native to the Mediterranean coast, Lobularia maritima thrives in hardiness zones 9-11 and reaches just 8-16 inches tall, making it remarkably efficient in containers, borders, and rock gardens. Flowering begins in just 50-60 days from seed, and this frost-tolerant variety handles light freezes with grace, continuing to bloom through cool seasons in milder climates. Its open-pollinated genetics mean you can save seed year after year, deepening your connection to this heirloom-quality annual.
Partial Shade
Moderate
9-11
16in H x ?in W
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Moderate
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Sweet alyssum does something few flowers do as reliably: it attracts and nourishes beneficial insects while thriving in the tighter quarters where other plants struggle. The compact growth habit combined with moderate water needs makes it genuinely low-maintenance once established. From hanging baskets to window boxes to the edges of beds, this plant fills awkward spaces with color and ecological value without demanding constant attention or fussy conditions.
Sweet alyssum shines as an edging plant along borders and pathways, where its modest height creates clean lines without overwhelming taller plants. Cascading from hanging baskets and window boxes, it softens hard lines and adds movement and fragrance to vertical gardening. In rock gardens, it nestles into crevices and between stones, bringing delicate bloom to mineral-rich, well-drained spots. Its appeal to beneficial insects makes it valuable in pollinator gardens, where it supports the ecological health of your entire growing space.
No timeline data available yet for this variety.
Sow seeds 4-5 weeks before your last frost date. Do not cover the seeds, as they require light to germinate; simply press them lightly into the soil surface. Maintain soil temperatures between 50-70°F for reliable germination. Once seedlings develop their first true leaves, thin crowded seedlings to give each plant room to develop. Harden off by growing seedlings at cool night temperatures around 50-55°F for 7-10 days before transplanting outdoors.
Transplant seedlings outdoors after all danger of frost has passed. Space plants 6 inches apart to allow adequate air circulation as they mature. In warmer climates (zones 9-11), you can also sow midsummer through late winter for continuous blooms that persist until June.
Direct seed as soon as soil can be worked in spring. Press seeds lightly into the soil surface without covering them. Thin seedlings when first true leaves appear, spacing them 6 inches apart.
Harvest flowers once they are fully open for use as edible flowers. Simply snip or pinch blooms from the plant as needed.
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