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Snapdragon Plant Seeds:
Guide to Storing, Sowing and Germination

Updated: July 1, 2023

Snapdragon plants, also known as Antirrhinum, are a favorite among gardeners for their beautiful and vibrant blooms. These versatile plants come in a variety of colors and can add a stunning touch to any garden or floral arrangement. If you’re looking to grow snapdragons from seeds, it’s essential to understand the proper methods for storing, sowing, and germinating these seeds. In this guide, we will walk you through the steps to successfully grow snapdragon plants from seed.

Storing Snapdragon Seeds

Storing snapdragon seeds properly is crucial for maintaining their viability. When storing these seeds, it’s important to consider their moisture content and temperature requirements. Follow these steps to ensure your snapdragon seeds stay fresh and viable:

  1. Harvesting the Seeds – Allow the snapdragon flowers to mature fully on the plant before harvesting the seeds. Look for dried seed pods that have turned brown or black. Gently remove the pods from the plant and place them in a paper bag.

  2. Drying the Seeds – Place the paper bag in a cool, dry location away from direct sunlight. Allow the pods to dry completely for about two weeks.

  3. Extracting the Seeds – Once the pods are completely dry, gently shake them to release the seeds. Remove any remaining plant matter or debris from the seeds.

  4. Storage Containers – Transfer the seeds into an airtight container such as a glass jar or a plastic bag with a zip lock seal. Make sure to label the container with the date of harvest and seed variety.

  5. Moisture Control – Add a desiccant packet or a small amount of powdered milk to absorb any moisture inside the container. This step is crucial in preventing mold or fungal growth that can damage the seeds.

  6. Ideal Storage Conditions – Store the container in a cool, dark place with a temperature between 35-41°F (2-5°C). A refrigerator or a cellar is an ideal location for long-term storage.

Following these steps will ensure that your snapdragon seeds remain viable for up to two years.

Sowing Snapdragon Seeds

Once you’re ready to sow your snapdragon seeds, it’s important to prepare the soil and provide the optimal growing conditions for successful germination. Here’s what you need to do:

  1. Soil Preparation – Snapdragons prefer well-drained soil with a pH level between 6.0 and 7.0. Remove any weeds or debris from the planting area and loosen the soil using a garden fork or tiller. Incorporate organic matter such as compost or well-rotted manure to improve soil fertility.

  2. Timing – The best time to sow snapdragon seeds is in late winter or early spring, approximately 8-10 weeks before the last frost date in your area. This will give the plants enough time to develop before transplanting them outdoors.

  3. Sowing Method – Fill seed trays or small pots with a seed-starting mix. Moisten the mix lightly, ensuring it’s not too wet. Scatter the snapdragon seeds evenly over the surface of the mix and press them gently into the soil, without covering them completely.

  4. Germination Requirements – Snapdragon seeds require darkness to germinate successfully. Cover the seed trays or pots with a plastic dome or a clear plastic bag to create a greenhouse-like environment. Place them in a warm location with temperatures around 65-70°F (18-21°C).

  5. Watering – Keep the soil consistently moist but not waterlogged during germination. Use a misting spray bottle to avoid disturbing the seeds.

  6. Germination Time – Snapdragon seeds typically take 10-14 days to germinate, although some varieties may take longer. Once the seedlings emerge, remove the plastic covering and place them in a bright location with indirect sunlight.

Germination and Care

After the snapdragon seedlings have emerged, it’s essential to provide them with the proper care to ensure healthy growth. Follow these tips to nurture your snapdragons:

  1. Light Requirements – Place the seedlings in a location that receives at least six hours of indirect sunlight per day. If growing indoors, use fluorescent grow lights to supplement natural light.

  2. Temperature Control – Maintain a temperature of 60-70°F (15-21°C) during the day and 50-60°F (10-15°C) at night for optimal growth.

  3. Watering – Water the snapdragon plants regularly, keeping the soil consistently moist but not waterlogged. Watering in the morning allows excess moisture on the foliage to dry before evening, reducing the risk of fungal diseases.

  4. Fertilizing – Apply a balanced liquid fertilizer diluted to half strength every two weeks during the growing season to provide essential nutrients for healthy growth.

  5. Transplanting – Once the danger of frost has passed and the seedlings have developed several true leaves, transplant them into well-prepared garden beds or containers, spacing them 8-12 inches apart.

  6. Maintenance – Remove any weeds around the plants regularly and pinch back the growing tips to promote bushier growth and more abundant flowering.

By following these guidelines for storing, sowing, and germinating snapdragon seeds, you can enjoy the beauty of these stunning flowers in your garden or home. Remember to experiment with different varieties and colors to create a vibrant and diverse display that will surely impress. Happy gardening!