From Seed to Bloom: Propagating the Sweet Pea’s Wild Cousin, Lathyrus clymenum
Lathyrus clymenum, also known as the “Tangier Pea” or “Climbing Sweet Pea,” is a stunning flowering vine that will add a splash of color to your garden. But did you know that this beautiful plant is easily propagated, making it a fun and rewarding project for beginner gardeners?
Growing from seed is the most common and reliable method to propagate Lathyrus clymenum. While you can purchase seeds, saving them from your own plants is a satisfying and economical choice.
Here’s a step-by-step guide to propagating Tangier Peas from seed:
1. Seed Collection:
- Wait until the seed pods of your Lathyrus clymenum are dry and brown.
- Gently twist or snap off the pods, avoiding any premature opening.
- Store the pods in a cool, dry place for several weeks to allow the seeds to fully mature.
- Once dry, carefully extract the seeds from the pods.
2. Sow the Seeds:
- Timing: Lathyrus clymenum seeds prefer cool temperatures for germination, so the best time to sow them is in the fall or early spring.
- Preparation: Choose a well-draining soil mix and fill your seed trays or pots.
- Sowing: Lightly press the seeds into the soil, ensuring they are covered with no more than 1/4 inch of soil.
- Watering: Gently water the seed tray or pots and maintain consistent moisture.
3. Germination:
- Timeframe: Lathyrus clymenum seeds can take several weeks to germinate, so be patient!
- Conditions: Ensure the soil remains consistently moist but not waterlogged.
- Temperature: Ideal germination occurs in temperatures around 65 to 70°F (18 to 21°C).
4. Transplanting:
- Once the seedlings have developed two or three true leaves, they are ready for transplanting.
- Choose a sunny location with well-drained soil.
- Gently remove the seedlings from their containers, taking care not to disturb the roots.
- Plant the seedlings in the ground, spacing them approximately 12-18 inches apart.
Troubleshooting:
- If your seeds fail to germinate, there are a few possibilities. They may be too old, or the soil may be too dry or too compacted.
- Try experimenting with different sowing depths and soil mixes to encourage germination.
Extra Tips for Success:
- Seed Scarification: To speed up germination, try lightly scarifying the seeds with sandpaper. This helps weaken the seed coat and allows water to penetrate more easily.
- Moisture: Lathyrus clymenum prefers moisture, so frequent watering is essential, especially during dry spells.
- Support: As Tangier Peas grow, they need support for their climbing vines. Provide trellises, stakes, or other structures for them to climb.
Beyond Seeds:
While seed propagation is the most common method, Tangier Peas can be also propagated via cuttings. This is ideal for obtaining new plants quickly or preserving specific genetic variations.
Choose the method that best suits your needs and enjoy the beautiful blooms of Lathyrus clymenum in your garden!