Dahlia Growing Tips: How to Grow This Bright and Cheerful Flower

Dahlia Growing Tips: How to Grow This Bright and Cheerful Flower

Dahlias are colorful, showy flowers that are relatively easy to grow in the garden or containers. They come in a wide range of sizes, colors, and shapes, from the petite "pompom" varieties to the large dinner plate-size blooms. They are a favorite among flower farmers due to their stunning blooms and easy-to-grow nature. Dahlia plants can be grown from tubers or seeds and can be planted in the ground or in containers.

Dahlia flowers are associated with a range of meanings and symbolism. In general, they are often seen as a symbol of elegance, dignity, and grace. Red dahlias are associated with strong emotions and passion, pink dahlias are a symbol of grace and gentleness, white dahlias represent purity and innocence, yellow dahlias are associated with happiness and positive energy, and purple dahlias represent elegance, refinement, and beauty.


Here's a comprehensive guide on how to grow beautiful dahlia plants

1. Choose the Right Location:

Dahlias need a sunny spot to grow and thrive. They require at least six hours of direct sunlight each day, preferably in the morning and early afternoon. The planting spots should also be sheltered from strong winds, as dahlias can be tall and top-heavy.

2. Prepare the Soil:

Dahlias prefer fertile, well-drained soil. They need plenty of nutrients to produce healthy foliage and gorgeous blooms. Dahlias prefer slightly acidic soil. Before planting, amend the soil with organic matter, such as compost or well-rotted manure. This will improve soil structure, drainage, and fertility.

3. Planting Dahlias:

Dahlias can be planted in the spring or in the autumn. To plant dahlias, dig a hole that is twice as wide and deep as the dahlia tuber. Place the tuber in the planting hole with the eye (or growing point) facing up, and cover it with 1 to 3 inches of soil.

4. Watering:

Dahlias need regular watering to keep the soil moist. However, overwatering can cause root rot. This is the biggest challenge in potted Dahlias. Deep watering once a week when the 1-2 inches of soil on the surface is dry, or more often during hot, dry weather.

5. Fertilizing:

Dahlias are heavy feeders and need regular fertilization to thrive. Use a balanced fertilizer every four to six weeks during the growing season. Alternatively, you can use a slow-release fertilizer at the beginning of the season. Well-rotted manure or homemade compost is also a good option.

6. Staking:

Dahlias are tender perennials with hollow stems, and they can grow quite tall and may require staking to prevent them from toppling over in strong winds. Some dwarf varieties may only grow to be 1-2 feet tall, while others can reach heights of 6 feet or more. Use stout stakes or metal supports to provide support for the plants.

7. Deadheading Dahlias:

To encourage continuous blooming, remove spent dahlia blooms regularly. This will also help to redirect the plant's energy to produce new blooms.

8. Overwintering:

In cold climates, dahlias need to be dug up and stored indoors to prevent them from freezing. Wait until the first frost has killed off the foliage, then carefully dig up the Dahlia bulbs, leaving some soil attached. Brush off any excess soil and let the tubers dry for a few days. Store them in a cool, frost-free place until it's time to plant them again in the spring.

9. Pests and diseases

Dahlias are generally hardy plants, but they can also be susceptible to pests and diseases. Some common pests that can affect Dahlia plants include spider mites, aphids, and thrips. In terms of diseases, powdery mildew, gray mold, and bacterial wilt are some common issues that can affect Dahlia plants. Proper care and maintenance, such as providing adequate air circulation, regular watering, and keeping the area clean, can help prevent these pests and diseases from affecting your Dahlias.

10. Dahlias in pots

Growing dahlias in pots is an excellent option for those with limited garden space or who want to grow them indoors. Choose a pot that is at least 12 inches in diameter. Compact varieties or dwarf types are well suited for container gardens.

Methods of Propagating Dahlia plants

There are several methods of propagating Dahlia plants, including division, stem cuttings, and seeds.

  1. Dahlias from tubers: Dividing Dahlia tubers is the most common method of propagation. This can be done in the spring before planting, or in the fall after the first frost. Simply dig up the Dahlia bulbs and use a sharp knife to cut them into pieces, making sure each piece has at least one eye (or bud). Plant dahlia tubers in well-drained soil and water them. A single tuber can give you many plants.

  2. Stem cuttings: Stem cuttings can be taken in the summer when the plant is actively growing. Select a basal cutting with a few leaves and cut it at an angle just below a node. Remove the lower leaves and dip the cut end in the rooting hormone. Plant the cutting in a well-draining potting mix and keep it moist until roots develop.

  3. Dahlias from Seed: Dahlia seeds can be collected from the plant's flowers after they have faded and the seed heads have dried. Sow the seeds 1/4 inches deep in a well-draining potting mix and keep them moist until they germinate. Once the seedlings have two or three sets of leaves, they can be transplanted into individual pots. Space the plants about 12-18 inches apart to allow for adequate growth.

Types of Dahlias

There are hundreds of varieties of Dahlia, but they are mainly divided into the following types:

  1. Single-flowered Dahlias: These are characterized by a single ring of flat petals and a center disk. They are perfect for attracting bees and butterflies.
  2. Anemone-flowered Dahlias: These have a central disc of tubular flowers surrounded by one or more rings of flat petals.
  3. Decorative Dahlias: These are known for their large, fully double flowers with flat petals. They come in a range of colors and sizes and are often used in floral arrangements.
  4. Cactus Dahlias: These have pointed petals that curve towards the center of the flower, giving them a spiky appearance. They come in a range of colors and sizes and are popular for their unique look.
  5. Pompon Dahlias: These have small, round flowers with tightly packed petals. They come in a range of colors and are often used in borders and containers.
  6. Waterlily Dahlias: These have fully double flowers with broad, slightly curved petals that give them a resemblance to waterlilies.
  7. Orchid-flowered Dahlias: These have fully double flowers with pointed petals that give them a resemblance to orchids.
  8. Collarette Dahlias: These have a single ring of flat petals surrounding a center disk of smaller tubular flowers, giving them a collar-like appearance.
  9. Ball Dahlias: Ball dahlias have fully double, ball-shaped flowers with rounded petals that curve inwards towards the center of the flower. They come in a range of colors and sizes.
  10. Dinnerplate dahlias: Dinner plate dahlias are a type of dahlia known for their large, showy flowers that can measure up to 12 inches in diameter. These dahlias are part of the Decorative group of dahlia cultivars and are popular for their beautiful flowers that come in a huge range of colors

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Extra reading

Winter Indoor Flowering Plants

Sun Loving Flowering Plants

Flowers that Thrive in Poor Soil

12 months flowering plants in India

Types of Dahlia



Happy Gardening!

Dr. Vandana K.