Marjoram prefers a slightly acidic soil to slightly alkaline soil. Good companions include the vegetables from the cabbage family. These include broccoli and brussels sprouts. Marjoram likes hot weather and does not do well in cold weather specially in frost. To keep the moisture in the soil be sure to cover the soil with mulch.
Marjoram can be harvested when the leaves are 4-6 inches tall. You can either pick out individual leaves or snip the entire stem for drying and storage. Marjoram can also be dried and stored in the jar for later use.