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Mum Plant Seeds:
Guide to Storing, Sowing and Germination

Updated: July 21, 2023

Introduction

Mum plants, also known as chrysanthemums, are a popular choice for home gardeners due to their vibrant colors and ability to bloom in late summer and fall. Growing mums from seeds can be a rewarding experience, but it requires proper storage, sowing, and germination techniques. In this article, we will provide a comprehensive guide to help you successfully grow mum plants from seeds.

Storing Mum Seeds

Proper storage of mum seeds is essential to maintain their viability. Here are some steps to follow:

  1. Harvesting: Allow the mum flowers to fully mature on the plant before collecting the seeds. The flowers will produce small, brown seed heads once they have dried out.

  2. Collecting Seeds: Carefully cut the seed heads from the plant using sharp scissors or pruners. Place them in a paper bag or envelope to prevent moisture buildup.

  3. Drying: Store the seed heads in a cool, dry place for about two weeks to allow them to fully dry out. This step helps prevent mold or rot during storage.

  4. Extracting Seeds: Once the seed heads are completely dry, gently rub them between your fingers to separate the seeds from the chaff. Remove any debris or damaged seeds.

  5. Storage Container: Transfer the clean seeds into an airtight container, such as a glass jar or plastic bag. Label the container with the date and variety of mum seeds stored.

  6. Ideal Conditions: Keep the container in a cool and dark location with a consistent temperature of around 40-50°F (4-10°C). Avoid exposing the seeds to direct sunlight or extreme temperature fluctuations.

By following these steps, you can ensure the long-term viability of your mum seeds and increase the chances of successful germination.

Sowing Mum Seeds

Once you are ready to sow the mum seeds, it’s important to choose the right time and location. Here’s what you need to know:

  1. Timing: Start sowing mum seeds indoors 8-10 weeks before the last expected frost date in your area. This will give the plants enough time to develop before transplanting them outdoors.

  2. Soil Preparation: Fill seed trays or pots with a well-draining seed starting mix. Avoid using garden soil, as it can be too heavy and may inhibit proper germination.

  3. Sowing Depth: Mum seeds are tiny and require light for germination. Scatter the seeds evenly on the surface of the soil without covering them. Lightly press them into the soil using your fingertips.

  4. Watering: Moisten the soil by misting it with water or using a spray bottle. Avoid overwatering, as it can lead to seed rot or fungal diseases. Maintain consistent moisture throughout the germination process.

  5. Germination Temperature: Place the seed trays or pots in a warm location with a temperature range of 70-75°F (21-24°C). You can use a seedling heat mat to maintain optimal temperatures if necessary.

  6. Germination Period: Mum seeds typically take 7-14 days to germinate. During this time, ensure that the soil remains moist but not waterlogged.

Germination and Care

Once the mum seeds have germinated, it’s important to provide them with proper care to ensure healthy growth:

  1. Light Requirements: Move the seedlings to a location with bright, indirect light as soon as they emerge. A south-facing window or a grow light placed 6-12 inches above the seedlings works well.

  2. Transplanting: When the seedlings have developed their second set of true leaves, gently transplant them into individual pots filled with well-draining potting soil. This will allow them to grow stronger before being planted outdoors.

  3. Fertilization: Feed the mum seedlings with a balanced liquid fertilizer diluted to half strength every two weeks. This will provide them with essential nutrients for healthy growth.

  4. Hardening Off: About one to two weeks before the last expected frost date, gradually acclimate the seedlings to outdoor conditions by placing them outside for a few hours each day. Start with a shady, sheltered spot and gradually increase their exposure to sunlight and wind.

  5. Planting Outdoors: After the danger of frost has passed, transplant the mum seedlings into well-prepared garden beds or containers. Space them according to the specific variety’s recommendations, usually around 12-18 inches apart.

  6. Maintenance: Provide regular watering to keep the soil evenly moist, but not waterlogged. Mulching around the plants can help retain moisture and suppress weed growth. Deadhead spent flowers to encourage new blooms.

By following these guidelines, you can successfully grow mum plants from seeds and enjoy their beautiful blooms later in the season.

Conclusion

Growing mum plants from seeds can be a rewarding experience for any gardener. By properly storing, sowing, and germinating mum seeds, you can ensure successful growth and vibrant blooms. Remember to provide adequate care throughout the process, from seedling stage to planting outdoors. With patience and dedication, you’ll be able to enjoy a stunning display of mum flowers in your garden.