Dahlias: A Guide to Growing from Seeds and Tubers
Introduction
Dahlias are beautiful summertime flowers that are easy to grow and come in a wide variety of sizes, colors, and shapes. They can be grown from either tubers or seeds, but each method has its own advantages and disadvantages.
Growing Dahlias from Tubers
The most common way to grow dahlias is from tubers. Tubers are underground storage organs that contain the plant’s DNA. They are typically planted in the spring after the last frost. To plant dahlia tubers, simply dig a hole about 6 inches deep and 12 inches wide. Place the tuber in the hole with the eyes facing up. Cover the tuber with soil and water well.
Dahlias grown from tubers will typically bloom in mid to late summer. They will continue to bloom until the first frost.
Growing Dahlias from Seeds
Dahlias can also be grown from seeds. However, it is important to note that dahlias grown from seeds will not be true to type. This means that they may not have the same color, size, or shape as the parent plant.
To grow dahlias from seeds, start by sowing the seeds indoors in late winter or early spring. Sow the seeds in a well-draining potting mix and keep them warm and moist. The seeds will germinate in 7 to 12 days.
Once the seedlings have developed their first set of true leaves, transplant them into individual pots. Harden off the seedlings by gradually exposing them to outdoor conditions for a few weeks before planting them in the garden.
Dahlias grown from seeds will typically bloom in late summer or early fall.
Tips for Growing Dahlias
Here are a few tips for growing dahlias successfully:
- Plant dahlias in full sun or partial shade.
- Dahlias need well-drained soil.
- Water dahlias regularly, especially during hot weather.
- Fertilize dahlias every few weeks with a balanced fertilizer.
- Deadhead spent blooms to encourage new growth.
- Protect dahlias from frost by mulching around the plants in the fall.
Saving Dahlia Seeds
Dahlias produce prolific amounts of seeds. To save dahlia seeds, simply wait until the flowers have faded and the seed pods have turned brown. Cut the seed pods off the plant and allow them to dry in a warm, dry place. Once the seed pods are dry, remove the seeds and store them in a cool, dark place.
Troubleshooting
Here are a few common problems that dahlia growers may encounter:
- Aphids: Aphids are small, green insects that can suck the sap from dahlia plants. To control aphids, spray the plants with a strong stream of water or use an insecticidal soap.
- Spider mites: Spider mites are tiny, red insects that can cause the leaves of dahlia plants to turn yellow and drop off. To control spider mites, spray the plants with a horticultural oil or use a miticide.
- Powdery mildew: Powdery mildew is a fungal disease that can cause the leaves of dahlia plants to become covered in a white powder. To control powdery mildew, spray the plants with a fungicide.
Conclusion
Dahlias are beautiful and easy-to-grow flowers that can add a touch of color and beauty to any garden. By following the tips in this article, you can successfully grow dahlias from either tubers or seeds.
