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Sweet Pea Plant Seeds:
Guide to Storing, Sowing and Germination

Updated: July 12, 2023

Sweet peas are beautiful and fragrant flowers that are a favorite among gardeners. Their vibrant colors and delightful scent make them a popular choice for adding beauty and charm to any garden or landscape. If you are interested in growing sweet peas, it is essential to understand the process of storing, sowing, and germinating the seeds properly. In this article, we will provide you with a comprehensive guide on how to ensure successful sweet pea seed cultivation.

Storing Sweet Pea Seeds

Storing sweet pea seeds correctly is crucial to maintain their viability and ensure successful germination. Here are some essential tips for storing your sweet pea seeds:

  1. Harvesting Seeds: To save seeds from your existing sweet pea plants, allow the pods to dry naturally on the plant until they turn brown and start to split open. Once the pods have split, remove them from the plant and allow them to dry further indoors for about two weeks.

  2. Cleaning Seeds: After drying, gently crush the pods to release the seeds. Separate the seeds from any remaining debris or chaff by using a sieve or fine mesh screen.

  3. Drying Seeds: Spread out the seeds in a single layer on a paper towel or newspaper and let them air dry for an additional week. Ensure that they are fully dry before storing them.

  4. Storage Containers: Place the dried seeds in an airtight container such as a glass jar or airtight plastic bag. Make sure to label the container with the date and variety of the seeds.

  5. Ideal Storage Conditions: Store your sweet pea seeds in a cool, dry place away from direct sunlight. A temperature range of 40-50°F (4-10°C) is ideal for maintaining seed viability.

By following these steps, you can store your sweet pea seeds for several years while retaining their germination potential.

Sowing Sweet Pea Seeds

Once the winter frost has passed and the soil has warmed up, it is time to sow your sweet pea seeds. Here’s how to sow them effectively:

  1. Soil Preparation: Sweet peas thrive in well-draining soil with a pH level between 6.0 and 7.5. Prepare the soil by removing any weeds or debris and loosen it with a garden fork or tiller.

  2. Seed Scarification: Soaking or scarifying sweet pea seeds can help increase germination rates. To scarify the seeds, rub them gently with a nail file or sandpaper to break through their hard outer coat. Alternatively, you can soak the seeds in warm water overnight.

  3. Planting Depth: Sweet pea seeds should be sown about an inch deep into the soil. Space the seeds about two inches apart to allow proper airflow and growth.

  4. Support Structures: Sweet pea plants are climbers and require support structures such as trellises, fences, or stakes to grow properly. Install these structures before sowing the seeds to avoid damaging the delicate roots later on.

  5. Watering: After sowing, water the soil thoroughly but gently to provide enough moisture for germination. Avoid overwatering, as excessive moisture can lead to seed rot.

  6. Location: Choose a sunny spot in your garden that receives at least six hours of direct sunlight per day.

  7. Companion Planting: Planting sweet peas alongside other flowers like marigolds or lavender can help deter pests and attract beneficial insects.

Germinating Sweet Pea Seeds

Germination is an essential stage in the growth of sweet pea plants. Here are some tips to ensure successful germination:

  1. Temperature: Sweet pea seeds germinate best in temperatures between 55-65°F (13-18°C). Keep the soil consistently moist but not waterlogged to provide the ideal environment for germination.

  2. Germination Time: Sweet pea seeds usually take around 10-14 days to germinate. However, some varieties may take longer, so be patient and continue to provide the necessary care.

  3. Thinning Seedlings: Once the seedlings have emerged, thin them out to ensure proper spacing and airflow. Leave the strongest and healthiest plants, removing any weak or overcrowded ones.

  4. Transplanting: When the seedlings have developed several sets of true leaves and are about 4-6 inches tall, they are ready to be transplanted into their final growing location. Handle the seedlings carefully to avoid damaging their delicate roots.

  5. Mulching: Applying a layer of organic mulch around the base of your sweet pea plants can help retain moisture, suppress weeds, and regulate soil temperature.

By following these guidelines for sowing and germinating sweet pea seeds, you can enjoy a bountiful display of vibrant and fragrant flowers in your garden.

In conclusion, growing sweet peas from seeds can be a rewarding experience for any gardener. By properly storing your seeds, sowing them correctly, and providing the optimal conditions for germination, you can enjoy the beauty and fragrance of these delightful flowers throughout the growing season. So go ahead and get started on your sweet pea seed cultivation journey – you won’t be disappointed!