How to Grow Marjoram

Growing guide

Overview

Marjoram is oregano’s sweeter, milder cousin — a tender perennial herb grown as an annual in cold zones. It has a warm, aromatic flavor that’s perfect for Mediterranean cooking, and it’s a low-maintenance plant that pollinators love. Give it full sun, well-drained soil, and only occasional water, and it will thrive.

Soil & planting prep

Marjoram prefers loamy, well-drained soil with a pH between 6.0 and 8.0. Work in compost or aged manure before planting to improve fertility and drainage. Space plants 8 to 12 inches apart, and sow seeds just 1/4 inch deep.

When to plant

Start marjoram indoors 8 weeks before your last frost date. Transplant seedlings outdoors only after the danger of frost has passed and the soil has warmed to at least 60°F. In zones 4–9, it can also be direct-seeded after the last frost, but indoor starts give you a head start on the 70–100 day harvest.

How to plant

1. Start seeds indoors 8 weeks before last frost in seed-starting mix, pressing seeds lightly into the surface (they need light to germinate).
2. Keep soil moist and at 65–70°F; seedlings emerge in 7–14 days.
3. Harden off seedlings over 7–10 days by gradually exposing them to outdoor conditions.
4. Transplant outdoors after last frost, spacing plants 8–12 inches apart in well-drained soil.
5. Water gently after planting and pinch the tips when plants reach 4–6 inches to encourage bushy growth.

5 common mistakes to avoid

• Overwatering: marjoram is drought-tolerant and prone to root rot in soggy soil. Let the top inch of soil dry out between waterings and ensure good drainage.
• Planting too early: marjoram is not frost-tolerant. Setting it out before the last frost can kill seedlings; wait until the soil is reliably warm.
• Poor air circulation: crowded plants invite fungal diseases. Space them properly and avoid overhead watering.
• Letting it flower: once marjoram blooms, leaf flavor turns bitter. Pinch off flower buds regularly to keep the plant productive.
• Growing in heavy clay: marjoram needs well-drained soil. Amend clay with compost or grow in raised beds or containers.

Harvesting & storage

Begin harvesting when plants are 6–8 inches tall, snipping stems just above a leaf node. Harvest regularly, but never take more than one-third of the plant at once. Use fresh, or dry in a cool, dark place and store in an airtight jar.

Companion planting

Marjoram grows well with most vegetables, especially cabbage, broccoli, and beans. Avoid planting it near cucumbers, which can be inhibited by aromatic herbs.

Growing in containers

Marjoram is container-friendly and grows well in a 1-gallon pot. Use a well-draining potting mix and place it in full sun; bring pots indoors before the first frost in cold zones.

Pro tips

Start indoors 6-8 weeks before last frost. Pinch regularly to keep bushy. Harvest before it flowers for best flavor. Bring pots indoors in cold zones.