Skip to content

Fall bulb pre-ordering started! Free shipping on orders over $100,-.

    How to grow Dahlias? - The ultimate growing guide for Dahlias

    Dahlias are beautiful flowers that are also easy to grow, making them a great addition to any garden. In this ultimate guide, we will cover everything you need to know about growing Dahlias, from planting to maintenance.

    How do I keep dahlias blooming?

    Dahlias are one of the most beautiful and popular garden flowers, known for their wide variety of colors, shapes, and sizes. These flowers are easy to grow and care for, and they can bloom all summer long, adding a splash of color to any garden or landscape.

    However, keeping dahlias blooming can be a challenge for some. Here are some tips on how to keep dahlias blooming:

    1. Adequate watering: dahlias need regular watering to thrive, especially during hot and dry weather. Water deeply once or twice a week, depending on the weather conditions, to keep the soil moist.
    2. Fertilizing: dahlias need regular feeding to promote healthy growth and blooming. Use a balanced fertilizer once a month throughout the growing season.
    3. Deadheading: remove spent blooms regularly to encourage the plant to produce more flowers. Deadheading also prevents the plant from wasting energy on seed production.
    4. Mulching: mulching around the dahlias will help retain moisture in the soil, regulate soil temperature, and suppress weeds.
    5. Staking: tall dahlias require staking to prevent them from falling over and breaking. Use bamboo stakes or a plant support system to keep the plant upright.
    6. Pest and disease control: keep an eye out for pests and diseases that can damage the dahlias. Use organic pest and disease control methods to prevent damage.

    By following these simple tips, you can enjoy a continuous display of beautiful dahlias in your garden all season long.


    Growing dahlias


    Should you deadhead Dahlias?

    If you're growing dahlias in your garden, you may be wondering whether or not to deadhead them. Deadheading is the process of removing spent blooms from a plant, and it can have benefits for both the appearance and health of the plant.

    So, should you deadhead Dahlias? The answer is yes! Deadheading dahlias not only keep the plant looking neat and tidy, but also encourages more blooms to grow. When you remove spent blooms, you're redirecting the plant's energy from producing seeds to producing new flowers.

    To deadhead dahlias, simply cut the stem of the spent bloom just above the first set of leaves. If you're looking to extend the blooming season even further, you can also pinch off the top of the stem above the third or fourth set of leaves. This will encourage the plant to produce even more blooms.

    Deadheading dahlias is a simple task that can make a big difference in the health and appearance of your plants. So if you want to keep your dahlias looking their best and blooming all season long, be sure to deadhead regularly!

    How long do Dahlias last once they bloom?

    The lifespan of dahlias from tubers can vary depending on several factors, such as weather conditions and care. Generally, once dahlias bloom, their flowers will last for about three to four months. Dahlias can produce blooms throughout the growing season, which typically lasts from mid-summer to the first frost in autumn. 

    With proper care, including regular watering, fertilization, and deadheading (removing spent blooms), dahlias can continue to produce flowers for several months. If you live in an area with a milder climate, they might be able to last a few weeks longer. 


    Do dahlias multiply?

    One question that many gardeners ask is whether these tubers can multiply, or if new tubers need to be purchased each year. The answer is yes, dahlias from tubers can multiply, and in fact, this is one of the benefits of growing dahlias from tubers.

    As the dahlia plant grows, it will develop new tubers, which can then be dug up and divided to create new plants. This is called dividing, and it is an easy way to propagate your dahlias without having to purchase new tubers each year. Dividing should be done in the fall after the first frost when the foliage has died back.

    To divide your dahlias, simply dig up the tubers and separate them by gently pulling them apart. Each tuber should have a section of the stem attached, as this is where new growth will occur. Once divided, the tubers can be replanted in a new location or stored for the winter.

    Beautiful dahlias

    What is the best way to grow dahlias?

    They are easy to grow and can add a pop of color to any garden or landscape. If you're interested in growing dahlias, here are some tips to help you get started.

    1. Choose the right location: Dahlias thrive in full sun, so choose a location that receives at least six hours of direct sunlight each day. They also prefer well-draining soil.
    2. Prepare the soil: before planting, prepare the soil by adding compost or aged manure to improve its fertility and drainage.
    3. Plant the tubers: plant the tubers in the spring after the last frost has passed. Dig a hole that is deep enough to accommodate the tuber and cover it with soil. Space the tubers 12-18 inches apart.
    4. Water regularly: Dahlias require regular watering, especially during hot and dry weather. Water deeply once a week, or more often if the soil is dry.
    5. Fertilize regularly: apply a balanced fertilizer every 4-6 weeks to encourage healthy growth and blooming.
    6. Pinch back: pinch back the growing tips of young dahlias to encourage bushier growth and more blooms.
    7. Stake tall varieties: tall dahlia varieties may require staking to keep them from falling over.

    What is the best potting soil?

    To ensure they thrive, it's important to choose the right potting soil. So, what is the best potting soil for dahlias?

    First and foremost, dahlias prefer well-draining soil that is rich in organic matter. This means that a good potting soil for dahlias should have a mixture of materials such as peat moss, perlite, and vermiculite. These materials allow for proper drainage while retaining moisture and nutrients.

    Additionally, dahlias require slightly acidic soil with a pH level between 6.0 and 7.5. To achieve this, you can add some lime to the potting mix if the pH is too low, or sulfur if it is too high.

    Another important factor to consider is the nutrient content of the potting soil. Dahlias require a balanced mix of nitrogen, phosphorus, and potassium. Look for potting soil that contains these essential nutrients in the right proportion.

    Lastly, it's always a good idea to choose potting soil that is free of harmful chemicals and pathogens. This will ensure that your dahlias remain healthy and disease-free.

    How can I make dahlias grow faster?

    Here are some tips to help your dahlias thrive and bloom as quickly as possible. Before you’re planning on planting your dahlia tubers, soak them for approximately 2 hours in lukewarm water. This is to make sure the dahlia tuber is hydrated already.

    First, ensure your dahlias are planted in fertile, well-drained soil. Dahlias require a lot of nutrients, so you may want to consider adding compost or fertilizer to the soil. Water your dahlias regularly, but be careful not to overwater them as this can cause root rot. To speed things up, you could fertilize your dahlias every 4-6 weeks.

    To encourage faster growth, pinch off the top of the main stem once it has reached a height of 12 inches. This will encourage the plant to produce more branches, resulting in more blooms. Additionally, deadhead your dahlias regularly to promote continuous blooming.

    Another way to make your dahlias grow faster is to provide them with plenty of sunlight. Dahlias thrive in full sun, so ensure they are planted in an area that receives at least six hours of direct sunlight per day.

    Multiple dahlias


    How do you grow bushier dahlias?

    If you want your dahlias to grow bushier, there are a few simple steps you can take to encourage this growth.

    Firstly, pruning is an essential part of growing bushier dahlias. Pinch off the top inch of each stem when your dahlias are about 12 inches tall. This will encourage branching and promote bushier growth. Repeat this process every few weeks, making sure to remove any dead or damaged foliage.

    Secondly, fertilization is crucial to the growth and health of dahlias. Use a balanced fertilizer that is rich in nitrogen, phosphorus, and potassium, and apply it every two weeks during the growing season. This will provide your dahlias with the nutrients they need to grow strong and healthy.

    Finally, watering is also critical to the growth of dahlias. Make sure to water your dahlias deeply and regularly, especially during hot and dry weather. Avoid overwatering, as this can lead to root rot and other problems.


    How long does it take for dahlias to start growing?

    The answer to this question depends on a few factors such as the climate, soil quality, and the planting method. Generally, dahlias take approximately 8 weeks to start growing after they are planted. However, this can vary depending on the specific conditions in your garden.

    To ensure that your dahlias start growing as soon as possible, it's important to plant them in well-draining soil that is rich in organic matter. It's also important to plant them in a location that receives plenty of sunlight.

    If you live in a cooler climate, you may want to start your dahlias indoors before transplanting them to your garden. This can help to give them a head start and ensure that they start growing as soon as possible


    How many dahlias can you grow from one tuber?

    This depends on the quality of the tuber and the number of eyes. Healthier tubers will of course produce more growth than damaged ones. Then it is important to check how many eyes (tiny buds) your dahlia tuber has because this is where the plant grows from. 1 eye gives 1 dahlia plant. Most tubers have multiple ‘eyes’, but it is common that dahlia tubers only have one eye. We check the tubers carefully that they have at least 1 eye.

    1 dahlia plant gives several blooms. Keep in mind that the smaller the dahlia variety, the more blooms it will give. For example, Dinnerplate dahlias have huge blooms, but there will be less than for example, the border dahlia. 

    Growing beautiful dahlias


    Will dahlias bloom in the first year from tubers?

    The short answer is yes, dahlias can bloom in the first year from tubers, but it depends on several factors. Firstly, the quality of the tuber is essential. You need firm and healthy tubers to ensure successful growth and blooming.

    Secondly, the timing of planting also affects the blooming. Dahlias need warm soil to grow, so it's recommended to plant them after the last frost in the spring. Dahlias are absolutely not hardy. 

    Thirdly, the growing conditions and care provided to the dahlias play a significant role in their blooming. Dahlias require full sunlight (at least 6 hours of direct sunlight), well-draining soil, and regular watering and fertilizing.

    Lastly, the dahlia variety can also affect blooming. Some varieties bloom earlier than others and may produce flowers sooner in the growing season.

    Do Dahlia tubers get bigger every year?

    As dahlia plants mature, they will typically produce larger tubers each year. This is because the plant stores energy in its tubers during the growing season, and this energy is used to produce new growth the following year. With each passing year, the plant will have more energy to store and use, leading to larger and more robust tubers.

    However, some factors can affect the size of dahlia tubers. For example, if the plant is not given proper care or is grown in unfavorable conditions, the tubers may not grow as large. Additionally, some varieties of dahlias naturally produce smaller tubers than others.

    To ensure that your dahlia tubers continue to grow and thrive, it's important to give them the proper care and attention. This includes planting them in well-draining soil, providing adequate water and nutrients, and protecting them from pests and disease.

    Premium Dutch Quality

    Safe Shipping

    Value for Money

    #1 Customer Service