Growing Rosemary From Seed: A Complete Guide

Thyme To Garden Now Growing Rosemary from Seed
Thyme To Garden Now Growing Rosemary from Seed from

Rosemary is a versatile and aromatic herb that not only adds flavor to various dishes but also offers several health benefits. While it is commonly propagated through cuttings, growing rosemary from seed can be a rewarding and economical experience. This guide will provide you with the necessary information and steps to successfully grow rosemary from seed.

Choosing the Right Seeds

When selecting rosemary seeds, it is important to choose a reputable supplier to ensure good germination rates. Look for seeds labeled as “open-pollinated” or “heirloom” to ensure genetic diversity and better adaptability to your local climate. Additionally, consider purchasing organic seeds to avoid any potential chemical contamination.

Preparing the Soil

Rosemary prefers well-draining soil with a pH level between 6.0 and 7.0. Start by loosening the soil in the planting area using a garden fork or tiller. Remove any weeds or debris and amend the soil with organic matter, such as compost or aged manure, to improve its fertility and drainage.

Sowing the Seeds

Rosemary seeds are small and delicate, so it’s important to handle them with care. Follow these steps to sow the seeds:

  • Moisten the soil in the planting area before sowing the seeds to ensure good contact between the seeds and the soil.
  • Scatter the seeds evenly over the soil surface. Alternatively, you can sow them in rows, spacing the seeds about 1 inch apart.
  • Lightly cover the seeds with a thin layer of fine soil or vermiculite. Avoid burying them too deep, as they require light to germinate.
  • Water the soil gently to keep it moist, but not waterlogged.

Providing Optimal Growing Conditions

To ensure successful germination and healthy growth, it is important to provide the following optimal growing conditions for your rosemary plants:

  • Temperature: Rosemary seeds require temperatures between 65°F and 75°F (18°C and 24°C) to germinate. Use a heat mat or place the seed tray in a warm location to maintain the ideal temperature.
  • Light: Rosemary is a sun-loving plant and requires at least 6 to 8 hours of direct sunlight per day. If you are growing rosemary indoors, use grow lights to supplement natural light.
  • Watering: Keep the soil consistently moist, but avoid overwatering, as rosemary is susceptible to root rot. Water the plants when the top inch of soil feels dry.

Transplanting the Seedlings

Once the seedlings have developed their first true leaves and are about 3 to 4 inches tall, it’s time to transplant them into individual pots or a garden bed. Follow these steps to transplant your rosemary seedlings:

  • Prepare the transplanting area by loosening the soil and adding organic matter.
  • Carefully remove the seedlings from the seed tray, being mindful of their delicate roots.
  • Plant each seedling at the same depth as it was in the seed tray, spacing them about 12 to 18 inches apart.
  • Water the transplanted seedlings thoroughly to help them establish their roots.

Caring for Rosemary Plants

Proper care is essential for the health and productivity of your rosemary plants. Here are some tips to keep in mind:

  • Pruning: Regular pruning helps maintain the shape and promote bushier growth. Prune the plants in early spring before new growth begins.
  • Watering: Rosemary is drought-tolerant once established, so avoid overwatering. Water deeply when the top inch of soil feels dry.
  • Fertilizing: Rosemary plants do not require heavy fertilization. A light application of balanced organic fertilizer in early spring is usually sufficient.
  • Protection: In colder climates, protect your rosemary plants from frost by covering them with a frost blanket or bringing them indoors.

Harvesting Rosemary

Once your rosemary plants have reached a mature size, you can start harvesting the leaves. Here’s how to do it:

  • Choose a sunny morning to harvest the leaves, as the essential oils are most concentrated at this time.
  • Use sharp scissors or pruning shears to cut sprigs of rosemary from the plant.
  • Harvest only a small portion of the plant at a time, leaving enough foliage for the plant to continue growing.
  • Store the harvested sprigs in a cool, dry place or freeze them for future use.


Growing rosemary from seed can be a rewarding and enjoyable experience. By choosing the right seeds, preparing the soil, providing optimal growing conditions, and caring for the plants, you can successfully grow healthy and productive rosemary plants. Remember to harvest the leaves properly to enjoy the full flavor and aroma of this versatile herb. Whether you are a beginner or an experienced gardener, growing rosemary from seed is a great way to add beauty and flavor to your garden.

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