While dahlias are typically grown from tubers, it is possible to grow them from seeds as well. Here's a step-by-step guide on how to grow dahlia flowers from seeds:
- Selecting Dahlia Seeds:
- Purchase dahlia seeds from a reputable supplier or collect seeds from existing dahlia plants if available. Note that growing dahlias from seeds may result in some variation in flower colors and forms compared to the parent plants.
- Starting Seeds Indoors:
- Start dahlia seeds indoors about 6-8 weeks before the last frost date in your area. Fill seed trays or small pots with seed-starting mix, which provides good drainage.
- Moisten the soil before sowing the seeds to ensure they make good contact with the growing medium.
- Plant the seeds about 1/4 inch deep and cover them with a thin layer of soil. Space the seeds according to the recommended distance for the specific variety.
- Place the trays or pots in a warm location with indirect sunlight. Use a plastic cover or plastic wrap to create a greenhouse-like environment that retains moisture.
- Germination and Seedling Care:
- Dahlias typically germinate within 7-14 days. Once the seedlings emerge, remove the plastic cover and place them in a location with bright, indirect light.
- Keep the soil consistently moist but not waterlogged. Water from the bottom to prevent damping-off disease.
- Maintain a temperature of around 65-75°F (18-24°C) for optimal seedling growth.
- Transplanting Seedlings:
- When the seedlings have grown several sets of true leaves and all danger of frost has passed, they can be transplanted into larger containers or into the garden.
- Choose a sunny location with well-drained soil. Prepare the planting area by incorporating organic matter and loosening the soil.
- Gently transplant the seedlings, taking care not to damage the fragile roots. Space them according to the recommended distance for the specific variety.
- Providing Care and Support:
- Water the seedlings regularly, ensuring the soil remains consistently moist but not saturated.
- Once the seedlings have established, apply a balanced fertilizer according to the manufacturer's instructions to promote healthy growth and flowering.
- As the plants grow, provide support such as stakes or a trellis to prevent them from bending or breaking in strong winds.
- Flowering and Maintenance:
- Dahlias grown from seeds may take longer to bloom compared to tubers, typically flowering in their second year.
- Monitor the plants for pests and diseases, and take appropriate measures to control them.
- Deadhead spent flowers regularly to encourage continuous blooming and remove any faded or damaged foliage.
Growing dahlias from seeds requires patience and care, as it takes longer to achieve blooming plants compared to tubers. However, it can be a rewarding process, offering the opportunity to experience the excitement of growing dahlias from scratch and enjoying the unique variations that arise from seed-grown plants.