Does Alyssum Spread

Soil

• Sweet alyssum is native to the southern Mediterranean, which is typically hot, arid and rocky. This plant tolerates all different soil types, provided they are well draining. Amending soil lightly with a couple inches of compost will provide the aeration that sweet alyssum needs to thrive. It will grow on soils that are often dry, but will require supplemental irrigation. Compost will ensure that the soil retains more moisture.

Water

• Texas A&M University classifies this plant as drought resistant and heat resistant, and Floridata suggests that it get supplemental irrigation when the soil or environmental conditions are especially dry. A soaker hose or drip irrigation system that runs throughout the bed will provide moisture directly to the roots. As this plant forms dense mats of foliage and flowers, watering at the roots can be a challenge. Too much water will lead to root rot.

Sun

• Full sun to partial shade will satisfy sweet alyssum's light requirements. It will do well in a rock garden with other heat-loving plants, such as succulents. Too little sun likely will result in a leggier plant with fewer blooms than it can potentially produce. If you live in a very hot climate, someplace with hot, arid summers, or you're closer to the warmest Zone in its range, consider providing morning sun and afternoon shade to avoid stressing the plant.

Uses

• Sweet alyssum's compact height and spread make an ideal choice for a border plant, a groundcover beneath tall trees, or the warm, dry conditions of a rock garden. This plant also does very well in containers or in hanging baskets. Place containers near a patio or walkway where passersby can take in the flowers' sweet scent.