Dahlia
Scientific Name: Dahlia pinnata
Description
Dahlias are a diverse genus of bushy, tuberous perennial plants known for their stunning, colorful blossoms. Flowers can be found in various shapes and sizes, ranging from small pom-pom styles to large, dinner-plate varieties. The foliage is typically dark green and helps to accentuate the vibrant colors of the flowers.
Where it Grows
- Mexico
- Central America
- United States (particularly in the northern regions)
- Europe
Planting
When
Dahlias are typically planted in the spring after the last frost date, allowing them to establish before the heat of summer.
How
- Choose a sunny location with well-draining soil.
- Dig a hole that�s about 6-8 inches deep.
- Place the tuber horizontally in the hole with the "eyes" facing upward.
- Cover with soil and water thoroughly.
Care
Watering
- Water regularly, ensuring the soil remains moist but not waterlogged.
- During dry spells, dahlias may require more frequent watering.
Thinning
- Thin out the seedlings when they are about 4-6 inches tall to ensure adequate spacing (around 12-18 inches apart).
Weeding
- Regularly check for weeds, especially during the early growth stages, and remove them to reduce competition for nutrients.
Mulching
- Apply a layer of mulch to help retain soil moisture and suppress weed growth.
Fertilizing
- Fertilize with a low-nitrogen fertilizer to encourage blooming rather than foliage growth.
- Apply every 4-6 weeks during the growing season.
Pest Management
- Watch for pests such as aphids and spider mites.
- Use insecticidal soap or neem oil as needed to control infestations.
Harvesting
- Dahlias can be cut for fresh arrangements when in full bloom, but it is best to cut in the morning for optimal freshness.
Common Problems
- Powdery mildew
- Slugs and snails
- Botrytis blight
Nutrition
Nutritional Benefits
Dahlia tubers are edible and can be a nutritious addition to your diet, being rich in carbohydrates and a good source of vitamins.
Nutritional Composition (per 100g)
Nutrient | Amount |
---|---|
Calories | 73 kcal |
Carbohydrates | 17.0 g |
Protein | 2.0 g |
Fat | 0.1 g |
Dietary Fiber | 1.3 g |
Vitamin C | 8 mg |
Potassium | 425 mg |
Varieties of Dahlia
- Dahlia 'Bishop of Llandaff'
- Dahlia 'Cafe au Lait'
- Dahlia 'David Howard'
- Dahlia 'Gallery Art Deco'
- Dahlia 'Karma Choc'
Health Benefits
Dahlia tubers are known for being high in inulin, which can support digestive health and may help in blood sugar regulation.
Fun Facts
- The dahlia was named after Swedish botanist Anders Dahl.
- Dahlias are the national flower of Mexico.
- They can grow up to 4 feet tall depending on the variety.
- Dahlias are known to attract pollinators, including bees and butterflies.