What To Know
- The exact timing varies depending on your location, but generally, you can plant them in the spring when the soil temperature reaches at least 60°F (15°C).
- Brush off excess soil, and allow them to dry in a cool, dark place for a few days.
- Store the tubers in a dry, cool location like a basement or garage.
Dahlias, with their vibrant colors and diverse shapes, are a beloved addition to any garden. Their captivating beauty and long blooming season make them a popular choice for flower enthusiasts. But before you can enjoy their stunning blooms, you need to know how to plant dahlias. This guide will walk you through the process, from choosing the right tubers to caring for your plants throughout the growing season.
Choosing the Right Dahlias
The first step to growing stunning dahlias is selecting the right varieties. With over 50,000 registered varieties, there’s a dahlia for every taste and garden style.
- Consider your climate: Some dahlias are more heat-tolerant than others. If you live in a hot climate, choose varieties known for their heat resistance.
- Think about your space: Dahlias come in various sizes, from compact varieties suitable for containers to tall, majestic types that need ample space.
- Choose colors and shapes: Dahlias offer a wide range of colors and forms, from classic single blooms to intricate, multi-layered pom-poms.
When to Plant Dahlias
Dahlias are frost-sensitive, so it’s crucial to plant them after the last frost has passed. The exact timing varies depending on your location, but generally, you can plant them in the spring when the soil temperature reaches at least 60°F (15°C).
Preparing the Soil
Dahlias thrive in well-drained soil rich in organic matter. Here’s how to prepare your garden bed:
- Amend the soil: Mix in compost or aged manure to improve drainage and fertility.
- Test the pH: Dahlias prefer slightly acidic soil with a pH between 6.0 and 7.0. You can adjust the pH with lime or sulfur if necessary.
- Dig planting holes: Make holes about 12 inches deep and 12 inches wide.
Planting Dahlia Tubers
Planting dahlia tubers is a straightforward process:
- Inspect the tubers: Look for healthy, firm tubers with at least one strong “eye” or bud.
- Place the tubers in the hole: Position the “eye” facing upwards, about 4-6 inches deep.
- Backfill the hole: Cover the tubers with soil, gently firming it around the base.
- Water thoroughly: Ensure the soil is well-moistened.
Caring for Your Dahlias
Once your dahlias are planted, you need to provide them with proper care to ensure healthy growth and abundant blooms.
- Watering: Water your dahlias regularly, especially during dry periods. Aim to keep the soil moist but not soggy.
- Fertilizing: Feed your dahlias with a balanced fertilizer every few weeks. Use a liquid fertilizer diluted in water for best results.
- Staking: Tall dahlia varieties need support to prevent them from flopping over. Use sturdy stakes and tie the plants to them as they grow.
- Deadheading: Regularly remove spent blooms to encourage more flowering.
Harvesting Dahlias
Dahlias will start blooming in mid-summer and continue to produce flowers until the first frost. To enjoy your blooms indoors, cut them in the morning when they are fully open.
- Cut the stems at an angle: This will help them absorb water better.
- Remove any leaves below the waterline: These will rot and contaminate the water.
- Place the stems in a vase with fresh water: Add a flower food tablet for longer-lasting blooms.
Dahlia Care in Fall
As the weather cools down, prepare your dahlias for winter:
- Cut back the stems: Once the first frost arrives, cut back the stems to about 6 inches above the ground.
- Dig up the tubers: Wait until the soil is dry before digging up the tubers.
- Clean and store the tubers: Brush off excess soil, and allow them to dry in a cool, dark place for a few days. Store the tubers in a dry, cool location like a basement or garage.
The End of the Show, But Not the End of the Story
While the blooming season may be over, your dahlia tubers are ready for their winter slumber. By following these steps for planting, caring for, and storing your dahlias, you’ll be rewarded with vibrant blooms year after year.
Quick Answers to Your FAQs
Q: Can I plant dahlia tubers in pots?
A: Absolutely! Dahlias grow well in containers, especially dwarf varieties. Choose a pot with drainage holes and fill it with a high-quality potting mix.
Q: How often should I fertilize my dahlias?
A: Fertilize your dahlias every 2-3 weeks during the growing season with a balanced fertilizer. You can also use a diluted liquid fertilizer for faster absorption.
Q: What are some common dahlia pests and diseases?
A: Common dahlia pests include aphids, slugs, and snails. Diseases like powdery mildew and rust can also affect dahlias. Monitor your plants regularly and take appropriate measures to control any problems.
Q: When is the best time to divide dahlia tubers?
A: You can divide dahlia tubers in the spring before planting or in the fall after digging them up. Dividing the tubers helps to create new plants and maintain their vigor.
Q: What are some tips for getting more blooms on my dahlias?
A: Deadheading, or removing spent blooms, encourages the plant to produce more flowers. You can also pinch back the growing tips to promote bushier growth and more blooms.
