Rosemary Herb Seeds, Salvia rosmarinus Herb Seeds
Salvia rosmarinus • Lamiaceae • Native to Mediterranean region
Grow Rosemary Herb Seeds, Salvia rosmarinus for quality plants from seed. Ideal for kitchen herb gardens, containers, fragrant borders, seasoning herbs, and Mediterranean planting, with fresh seed packs for reliable.
Plant Name: Rosemary Seeds
Quantity: 100 Seeds
Selected: Rosemary Seeds / 100 Seeds
Germination depends on soil, temperature, moisture, and care. See our return policy for details.
At a glance
Rosemary is highly sensitive to overwatering and poorly drained soil, which causes root rot far more often than drought does, so err firmly on the side of dry rather than wet at every stage from germination onward.
Botanical profile
Meet the Rosemary Herb
Step-by-step planting
Growing rosemary from seed is a slow and rewarding process that benefits from understanding what this sun-loving Mediterranean herb actually needs at each stage.
-
1
Start Seeds Indoors Early
Begin rosemary seeds indoors 10 to 12 weeks before your last expected frost date, pressing seeds lightly onto the surface of a well-draining seed-starting mix without burying them, as they need light to germinate.
-
2
Dial In Soil Temperature
Rosemary seed germination is most reliable when soil temperature stays consistently between 65 and 75 degrees Fahrenheit, so a seedling heat mat placed under the tray makes a meaningful difference in colder months.
-
3
Water with Restraint
Mist the surface gently to keep it barely moist but never soggy, allowing the top layer to approach dryness between waterings so the seeds are not sitting in prolonged dampness.
-
4
Be Patient with Germination
Rosemary seeds can take anywhere from 14 to 28 days or longer to sprout depending on your specific climate, seed freshness, and care conditions, so do not abandon a tray that looks slow.
-
5
Provide Plenty of Light
Once seedlings emerge, move them immediately under a grow light or into your sunniest south-facing window, giving them 14 to 16 hours of bright light daily to prevent weak, leggy growth.
-
6
Transplant and Space Properly
When seedlings reach 3 to 4 inches tall and after hardening off outdoors for 7 to 10 days, transplant into the garden spacing plants 18 to 24 inches apart to allow for mature spread and good air circulation.
-
7
Plan for Your USDA Zone
Rosemary is a perennial in USDA zones 7 through 11, where it can grow into a sizeable shrub year after year, while gardeners in zones 6 and colder should plan to overwinter plants indoors or grow them as annuals.
Year-round care
Spring
- Sow after last frost
- prepare soil with compost
Summer
- Water regularly
- feed monthly
Fall
- Harvest before frost
- store well
Winter
- Rest
- store seeds cool and dry
Full specifications
Shipping
- Orders are delivered within 8 to 16 business days.
- All orders include tracking.
- Free shipping on all orders.
- Seeds are packed in moisture-resistant, resealable foil packets.
Germination
Germination rates vary depending on climate, soil conditions, and care. Seeds perform best when planted in the right season at the correct temperature, with consistent moisture and adequate light. We take quality seriously and each batch is tested before packaging. If you have concerns about your seeds, reach out and we will do our best to help.
Frequently asked
Questions about Rosemary Herb Seeds
How long do rosemary seeds take to germinate?
Rosemary seed germination typically takes 14 to 28 days under good conditions, but it is not unusual for some seeds to take 30 days or more. Germination depends heavily on soil temperature, moisture consistency, and seed freshness, so results vary from one gardener to the next. Keeping soil temperature steady between 65 and 75 degrees Fahrenheit gives you the most favorable conditions.
What temperature is best for germinating rosemary seeds?
A soil temperature between 65 and 75 degrees Fahrenheit is the sweet spot for rosemary seed germination. Air temperature in the room matters less than the actual temperature at the soil surface, which is why a seedling heat mat is a practical tool during winter seed starting. Once seedlings are established, rosemary thrives in warmer conditions and full sun.
Can rosemary be grown in containers?
Rosemary container gardening works well as long as you choose a pot with excellent drainage holes and use a fast-draining mix such as a cactus blend or a standard potting mix cut with perlite. Containers are especially useful for gardeners in colder climates who need to bring plants inside before frost. Make sure the container gets at least 6 to 8 hours of direct sun daily and avoid letting the pot sit in a saucer of standing water.
When should I start rosemary seeds indoors?
Start rosemary seeds indoors 10 to 12 weeks before your last average frost date to give seedlings enough time to develop before transplanting. Because rosemary grows slowly from seed compared to many herbs, starting early gives you a meaningful head start on the season. In most parts of the United States, this means starting seeds in late January or February.
How far apart should rosemary plants be spaced?
Space rosemary plants 18 to 24 inches apart in the garden to accommodate their mature spread, which can reach 2 to 4 feet wide depending on the variety and climate. Good spacing also promotes airflow around the foliage, which helps prevent fungal issues in humid conditions. In containers, one plant per pot of at least 12 inches in diameter works well.
Is rosemary a perennial or annual?
Rosemary is a perennial in USDA zones 7 through 11, where it can survive winters outdoors and grow into a woody shrub that lives for many years. In zones 6 and colder, the plant will not survive a hard freeze in the ground, so most gardeners in those regions grow it in containers that can be moved indoors, or treat it as a seasonal annual. Even as an annual, rosemary produces generously through the growing season.
Why are my rosemary seeds not germinating?
The most common reasons rosemary seeds fail to germinate are soil that is too cold, too wet, or seeds that are past their viable window. Rosemary seeds have a relatively short shelf life compared to many vegetables, and germination drops off noticeably with older seeds. Try using fresh seeds, adding a heat mat to bring soil temperature up to at least 65 degrees Fahrenheit, and making sure the mix is moist but not waterlogged.