Live to Plant

Lemon Thyme Plant Seeds:
Guide to Storing, Sowing and Germination

Updated: July 18, 2023

Lemon thyme (Thymus citriodorus) is a delightful herb that adds a citrusy twist to various culinary dishes. Whether you’re a seasoned gardener or a beginner, growing lemon thyme from seeds can be a rewarding experience. In this guide, we will explore the best practices for storing lemon thyme seeds, sowing them, and ensuring successful germination.

Storing Lemon Thyme Seeds

Properly storing lemon thyme seeds is crucial to maintain their viability and ensure successful germination in the future. Here are some essential steps to follow when storing these seeds:

  1. Harvesting Seeds: To gather the seeds, you’ll need to allow your lemon thyme plant to flower and produce seed heads. Once the flowers have dried and turned brown, carefully remove the seed heads from the plant. Place them in a paper bag or envelope to collect the seeds.

  2. Drying Seeds: After collecting the seed heads, it’s important to dry them thoroughly before storing. Spread the seed heads out on a clean, dry surface and allow them to air dry for about two weeks. Make sure they are kept in a well-ventilated area away from direct sunlight.

  3. Removing Chaff: Once the seed heads are completely dry, gently crush them to release the lemon thyme seeds. To separate the seeds from any remaining chaff or debris, use your fingers or a fine mesh sieve.

  4. Storage Containers: Transfer the cleaned lemon thyme seeds into small airtight containers such as glass jars or resealable plastic bags. Make sure to label each container with the date of collection and any other relevant information.

  5. Ideal Storage Conditions: Lemon thyme seeds should be stored in a cool, dark, and dry place to maintain their viability. A temperature around 40-50°F (4-10°C) is ideal for long-term storage. Avoid exposing the seeds to moisture or extreme temperature fluctuations, as this can reduce their germination rate.

By following these steps, you can store your lemon thyme seeds for up to three years while retaining their ability to germinate successfully.

Sowing Lemon Thyme Seeds

Once you’re ready to sow your stored lemon thyme seeds, it’s important to provide them with the best possible conditions for germination. Here’s a step-by-step guide on how to sow lemon thyme seeds successfully:

  1. Timing: Lemon thyme seeds should be sown indoors approximately 6-8 weeks before the last expected frost date in your region. This will give them enough time to establish before transplanting them outdoors.

  2. Seed Trays and Soil: Fill a seed tray or small pots with a well-draining seed starting mix. Lemon thyme prefers slightly alkaline soil, so ensure the pH level is between 6.0 and 7.5.

  3. Moisture and Temperature: Moisten the soil before sowing the seeds to ensure proper hydration. Place the tray or pots in a warm location with temperatures between 70-75°F (21-24°C). Cover the tray with a plastic dome or use a plastic wrap to create a greenhouse-like environment.

  4. Sowing Method: Sprinkle the lemon thyme seeds evenly over the soil surface, ensuring they are not too close together. Lightly press them down into the soil with your fingertips, but avoid burying them too deep.

  5. Covering and Light: Sprinkle a thin layer of vermiculite or fine sand over the seeds to cover them lightly. This will help retain moisture and prevent the seeds from drying out. Lemon thyme seeds require light to germinate, so do not cover them with soil.

  6. Watering: Using a misting bottle or a gentle watering can, moisten the soil thoroughly without causing any waterlogging. It’s crucial to keep the soil consistently moist during the germination period.

  7. Germination: Lemon thyme seeds typically take around 10-14 days to germinate. Once the seedlings emerge, remove the plastic dome or wrap and place the tray or pots in a location with bright, indirect sunlight.

Germination Tips for Lemon Thyme Seeds

To ensure successful germination of your lemon thyme seeds, consider the following tips:

  • Thinning Seedlings: Once the seedlings have grown their first set of true leaves, thin them out by snipping off the weakest ones. This will allow the remaining seedlings to have enough space and resources to grow.

  • Transplanting: When the seedlings are around 2-3 inches tall and all danger of frost has passed, they can be transplanted into larger containers or directly into your outdoor garden. Ensure they are spaced at least 8-12 inches apart to allow for proper growth.

  • Watering and Fertilizing: Lemon thyme plants prefer well-draining soil, so avoid overwatering. Allow the top inch of soil to dry out slightly between waterings. Fertilize the plants every 4-6 weeks using a balanced organic fertilizer to promote healthy growth.

  • Pruning: Regularly prune your lemon thyme plant to encourage bushier growth and maintain its shape. You can harvest fresh leaves as needed for culinary purposes, which will also help keep the plant compact and productive.

Growing lemon thyme from seeds can be a rewarding experience for any herb enthusiast. By following these guidelines for storing, sowing, and germinating lemon thyme seeds, you’ll be well on your way to enjoying this delightful herb in your own garden or kitchen. Happy gardening!