Although marjoram plants are tender perennials, they are typically treated as annuals as freezing temperatures will cause serious injury or death to the plants.
When growing marjoram plants,
it’s generally best to start the seeds indoors during late winter or early spring.
Push seeds just below the soil surface. Seedlings can be transplanted outdoors once all threat of frost has passed.
There’s no need for fertilizer either when growing marjoram herbs.
It’s hardy enough to basically care for itself.
During mild weather, marjoram plants grown indoors can be taken outside and placed in a sunny area.
However, container-grown plants should always be moved indoors or to another sheltered location once cold temperatures or frost is imminent.