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This article was co-written by Lauren Kurtz. Lauren Kurtz is an expert in nature and horticulture. Lauren has worked for Aurora, Cporado, managing the Water-Wise Garden at Aurora City Center for the Department of Water Conservation. She earned her bachelor’s degree in Environmental and Sustainability Studies from Western Michigan University in 2014.
There are 9 references cited in this article that you can view at the bottom of the page.
This article has been viewed 2,657 times.
Dahlias are beautiful flowers with a variety of colors. Many gardeners are skeptical about growing dahlias in pots because they are quite tall and heavy, but actually dahlias can grow well in large planters and have support poles for large varieties. With the right growing conditions and a little care, you will be able to see the beautiful flowers all summer long.
Steps
Create the right environment for plants
- Small and medium-sized dahlia varieties include Bednall Beauty, which grows to 60 cm, and Bishop of Llandaff, which grows to 90 cm. Larger varieties include Hadrian’s Sunlight and Twyning’s After Eight, which can grow to 1.2 meters or more. [2] X Trusted Source Royal Horticultural Society Go to Source
- A dahlia tuber requires 30-60 cm of space, so you’ll probably need to plant one pot each. [3] X Research Sources
- For the largest varieties, choose a 60x60cm pot, which usually holds about 95 liters of soil.
- You should use sturdy ceramic or terracotta pots because plastic pots are usually very light.
- Remember that unglazed terracotta and ceramic pots have the property of absorbing water, so they can freeze and crack if left outdoors during winter. [6] X Research Sources
- Dahlias grow best in well-drained environments. Although dahlias are water-intensive plants, their delicate roots are susceptible to rotting if the soil becomes soggy.
- Spread a layer of gravel about 5cm thick on the bottom of the pot to improve drainage.
- Be sure to rinse thoroughly to rinse off the soap.
- This step is especially important if you are using a pot that has previously grown other plants.
- Note that garden soil is not suitable for potted plants. You need to buy potting soil labeled for potted plants.
Plant a tree
- If you live in an area that often experiences spring frosts and want to plant them right away, you can plant them indoors first, and then move them outside.
- Finally, you will bury the flower bulbs at a depth of about 10-15cm, then cover with soil up to about 2.5cm from the mouth of the pot.
- To plant the flower bulbs at the right depth, you should initially pour the soil about 13-18 cm from the mouth of the pot.
- Any fertilizer recommended for flowering plants is suitable for dahlias.
- You can find fertilizers sold in stores with NPK numbers, representing nitrogen, phosphorus and potassium. Fertilizers suitable for dahlias include 5-10-15, 5-10-10, and 10-20-20.
- Use a fertilizer with a higher nitrogen content early in the season, then use another fertilizer with a lower nitrogen content.
- Read and use according to the instructions on the product packaging.
- Insert the stake into the soil next to where you plan to place the flower bulbs. You should choose a stake with a height of at least 90 cm above the ground after it reaches the bottom of the pot.
- For a 30 cm pot, you need to use a 1.2 meter high stake.
- Loosely tie the stem to the stake as the plant grows.
- The tuber looks like a bud and is located opposite the roots on the tuber.
- Don’t let the soil dry out completely, but soggy soil will rot the flower bulbs.
- You probably don’t need to water until the buds are in the ground and the first leaves appear, unless you live in a hot climate. [18] X Research Sources
- As the stem grows taller, continue to cover the remaining space in the pot with a little more soil until it is about 2.5cm from the top of the pot.
- Dahlias grow very quickly, and you should see full leaves within 2 weeks. The flowers usually appear 8 weeks after planting.
Take care of plant
- If you grow plants indoors, you need to supplement the sun with fluorescent grow lights.
- You’ll also need to provide extra light if you’re starting to grow houseplants in early spring. Install the light above about 15 cm from the mouth of the pot when the bulbs are first planted and gradually raise them as the plants grow.
- High levels of phosphorus promote flowering, while potassium stimulates root growth.
- Use fertilizer according to the instructions on the product packaging.
- When the plant grows to about 40cm tall, cut off the tops of the plants before the flower buds form to stimulate the plant to grow more luxuriant.
- Removing the bottom leaves will help better air circulation, thereby reducing the risk of mold infection.
- Find insecticides and mite repellents specifically designed for flowering plants at a gardening center and use them as directed.
- Use organic insecticides, such as horticultural soap or neem oil if you prefer natural remedies.
- Store the bulbs in a dry and dark place with a temperature of 4-10 degrees Celsius during the winter and replant in the spring.
Advice
- When cutting dahlias, dip the cut end of the flower stalk in hot water. This will keep the moisture inside and help the flowers stay fresh longer.
Things you need
- Dahlia tubers
- Large and heavy planter pot
- Tree shovel
- Planting soil mix
- Fertilizer
- Wooden or metal stakes
- Rope
- Tree pruning scissors
This article was co-written by Lauren Kurtz. Lauren Kurtz is an expert in nature and horticulture. Lauren has worked for Aurora, Cporado, managing the Water-Wise Garden at Aurora City Center for the Department of Water Conservation. She earned her bachelor’s degree in Environmental and Sustainability Studies from Western Michigan University in 2014.
There are 9 references cited in this article that you can view at the bottom of the page.
This article has been viewed 2,657 times.
Dahlias are beautiful flowers with a variety of colors. Many gardeners are skeptical about growing dahlias in pots because they are quite tall and heavy, but actually dahlias can grow well in large planters and have support poles for large varieties. With the right growing conditions and a little care, you will be able to see the beautiful flowers all summer long.
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