Thuja Plant Seeds:
Guide to Storing, Sowing and Germination

Thuja, also known as arborvitae, is a popular evergreen plant that adds beauty and privacy to any garden or landscape. Whether you are a seasoned gardener or a beginner, growing thuja from seeds can be an exciting and rewarding experience. In this article, we will provide you with a comprehensive guide on how to store, sow, and germinate thuja plant seeds.

Storing Thuja Plant Seeds

When it comes to storing thuja plant seeds, proper handling is crucial to maintain their viability. Here are some steps you can follow to ensure the longevity of your seeds:

1. Harvesting: Thuja seeds are typically ready for harvest in the late summer or early fall when the cones turn brown and start to open. Gently shake the cones to release the seeds into a container.

2. Cleaning: Remove any debris or twigs from the seeds by gently rubbing them between your fingers. Avoid using water as it can damage the seeds.

3. Drying: Spread the cleaned seeds in a single layer on a paper towel or newspaper and leave them in a cool, dry place for about two weeks. Make sure they are fully dry before moving on to the next step.

4. Storage Containers: Transfer the dried thuja seeds to an airtight container such as a glass jar or a plastic bag. You can also add some desiccant packets to absorb any excess moisture.

5. Temperature and Humidity: Store the container in a cool and dark place with a temperature between 32-41°F (0-5°C). Avoid exposing the seeds to direct sunlight or fluctuating temperatures, as it can reduce their viability.

By following these steps, you can store thuja plant seeds for up to one year without compromising their germination rate.

Sowing Thuja Plant Seeds

Now that you have properly stored thuja plant seeds, it’s time to sow them and start the germination process. Here’s how you can do it:

1. Seed Trays or Pots: Fill seed trays or small pots with a well-draining seed starting mix. Make sure the containers have drainage holes to prevent waterlogging.

2. Sowing Depth: Sow the thuja seeds on the surface of the soil and gently press them down. Since thuja seeds require light for germination, avoid covering them with soil.

3. Watering: Moisten the soil evenly using a spray bottle or a gentle watering can. Avoid overwatering as excessive moisture can lead to fungal diseases.

4. Location: Place the seed trays or pots in a warm and bright location, but avoid direct sunlight. A temperature range of 65-75°F (18-24°C) is ideal for germination.

5. Misting: To maintain the moisture levels, mist the soil regularly with water. Ensure that the soil remains damp but not soggy throughout the germination period.

6. Germination Time: Thuja plant seeds can take anywhere from 2-4 weeks to germinate, so be patient and keep an eye on them.

Germination of Thuja Plant Seeds

Once your thuja plant seeds have started to germinate, here are some tips to ensure their healthy growth:

1. Thinning: Once the seedlings have developed their first true leaves, thin them out by removing weaker or overcrowded seedlings. This will allow sufficient space for the remaining seedlings to grow.

2. Transplanting: When the thuja seedlings have grown to about 2-3 inches tall, they can be transplanted into individual pots or directly into the garden. Make sure to harden off the seedlings by gradually exposing them to outdoor conditions before transplanting.

3. Soil Requirements: Thuja plants prefer well-draining soil with a slightly acidic to neutral pH range of 6.0-7.0. Amend the soil with organic matter such as compost before planting to improve its fertility and drainage.

4. Watering and Fertilizing: Water the thuja plants regularly, keeping the soil evenly moist but not waterlogged. Apply a balanced slow-release fertilizer in spring to promote healthy growth.

5. Pruning and Shaping: Thuja plants are often grown for their neat and compact appearance. Regular pruning can help maintain their desired shape and size.

By following these guidelines, you can successfully grow thuja plants from seeds and enjoy their beauty in your garden or landscape.

In conclusion, growing thuja from seeds can be a rewarding endeavor for any gardener. By properly storing, sowing, and germinating thuja plant seeds, you can successfully grow these evergreen beauties in your own garden. So go ahead, gather your supplies, and start your journey to create a stunning thuja-filled landscape. Happy gardening!