Will alyssum come back? The answer is yes in most garden zones. Once the tiny flowers are spent, they will release seeds right back in to the ground. The easiest way to assure they reseed themselves is to do nothing when they die back.

Sweet alyssum, Lobularia maritima, is a common annual flower plant. Lobularia maritima is a mat-forming annual or short-lived perennial native to the Mediterranean, Canary Islands and Azores, where it grows along the coast in rocky, sunny areas.

They may not look like much as seedlings, but sweet alyssum plants can really spread. They take about nine to 10 weeks to flower from the time you sow the seeds. Don't be alarmed if plants go dormant in the heat of summer. They'll perk back up again when temperatures cool closer to fall.

Sweet Alyssum is a hardy annual plant which reseeds itself readily and can grow year round in a mild climate. It is one of several types of plant are called “Alyssum”, such as Yellow Alyssum (Aurinia saxatilis) which is a rugged, perennial groundcover.. . . . .364011233491!]0000000000000009783314146137!]