Sweet, or knotted, marjoram is a warmth-loving herb with a sweeter, milder flavour than oregano. In Britain it is usually grown as a tender annual. Its soft leaves are useful in salads, meat dishes and Mediterranean cooking, and neat plants thrive on a sunny patio.

When and how to sow

Sow marjoram indoors from March in module trays of seed compost, keeping the young plants on a bright windowsill or in a greenhouse. Pot on if necessary, then plant outside after the last spring frost, usually later in cooler northern areas. Alternatively, buy a young plant from a garden centre. Choose a warm, sunny, sheltered place with free-draining soil, or grow it in a pot.

Care

Water young plants until rooted, then let the compost or soil partly dry before watering again. Cold, wet conditions are more harmful than a short dry spell. Pinch out shoot tips regularly to make compact, leafy plants. Keep pots raised above standing water and move them under cover if an early autumn frost threatens.

Common problems

Overwatering and poor drainage can cause plants to collapse, particularly in cool weather. Use free-draining compost and avoid planting out too early. Aphids may gather on tender tips, while overcrowded, damp plants can develop mildew. Remove damaged leaves, improve spacing and water around the roots in the morning.

Harvest

Pick sprigs once plants are bushy, taking the tender tips for salads, meat dishes and Mediterranean recipes. Regular harvesting encourages branching. For the best flavour, gather stems just before flowers open. Cut on a dry morning and use fresh, or dry small bunches in an airy indoor place for later cooking.

Growing Marjoram: frequently asked questions

When should I sow marjoram in the UK?

Sow marjoram indoors from March in module trays of seed compost, keeping the young plants on a bright windowsill or in a greenhouse.

What are common problems when growing marjoram?

Overwatering and poor drainage can cause plants to collapse, particularly in cool weather.

When is marjoram ready to harvest?

Pick sprigs once plants are bushy, taking the tender tips for salads, meat dishes and Mediterranean recipes.

General guidance for UK home gardens and allotments. Reference figures are typical values; your exact timing depends on your region, last-frost date and variety. Page updated 19 Sep 2026.