Dahlia bloemen aquarel van Bloemoloog.nl

Organic dahlias

Organically grown dahlia tubers

Dahlias come in a variety of sizes, ranging from small flowers to huge flowers. They come in many different colors and some even have multi-colored petals. The herbaceous leaves range from light green to very dark green and die off completely after flowering.

Dahlias produce beautiful flowers and bloom for a very long time from summer until deep into autumn. Dahlias are perennial if they are dug up before the frost and replanted after the frost.

Edible flowers

The dahlia tubers of the Bloemoloog are grown 100% without chemicals or artificial fertilizers. This makes the entire plant edible. Enjoy the colorful flowers in a salad or decorate a carafe of water with them. The tubers taste like carrots, but also radish.

Are they dahlia bulbs or tubers?

We often get the question at the market whether they are dahlia bulbs or tubers. A dahlia plant grows from a tuber. It is a thickened, fleshy rootstock, the shape and size of which can vary depending on the type and age of the dahlia.

What types of dahlias are there?

The most special characteristic of the dahlia is the diversity in species. Below is a list of species that are known to the Floriologist:

  • Anemone Dahlia - resembles an anemone with a clearly visible central disc like the ' Platinum Blonde '
  • Baldahlia - The outer curled petals curl back so far that the flower appears round.
  • Cactus dahlia - The many petals have pointed ends because the petals are completely curled up, making the flower reminiscent of a cactus.
  • Decorative Dahlia - A standard type with medium wide petals, ranging from medium to large flowered
  • Dinnerplate dahlia - LARGE flowered like the well-known ' Cafe au Lait '
  • Dark-leaved dahlia - The leaves and flower stems are dark green, almost red and often pointed. The Dahlia 'Waltzing Mathilda' is one of the 4 dark-leaved dahlias that the Bloemoloog offers.
  • Single-flowered dahlia - A flower formed by a single or multiple circles of petals surrounding an open center.
  • Fimbriata dahlia - Many narrow petals with fine fringe-like incisions, varying from medium-sized to large-flowered.
  • Collared Dahlia - A flower with an open center, surrounded by a collar of narrow upright petals and a ring of plain petals on the outside like the ' Ace of Hearts '
  • Orchid dahlia (star-shaped) - A flower as a star should be, formed by a few single petals.
  • Peony dahlia - Open heart dahlias with one or two rings of petals.
  • Pompon - Small round flowers formed by rolled petals such as the purple ' Rocco ' and the white ' Snowflake '.
  • Semi-cactus dahlia - The many petals have pointed ends because the petals are completely curled up, making the flower reminiscent of a cactus, but the flower is fuller in bloom than the flowers of the cactus type.
  • Waterlily dahlia - A standard type with medium-wide petals, the outer petals of which grow slightly less backwards than the 'decorative' type

How do you plant dahlias?

Indoor favoritism

A dahlia is not winter hardy. This means that the tubers can be forced indoors from March. This gives them a head start in growth and the dahlias will flower earlier. The plants can be put outside after the Ice Saints (15 May), or earlier if the weather is good, but watch out for night frost, then they have to go back inside at night.

Outside in the garden

If you choose to wait to plant the dahlia tubers until after the frost, it is best to do so up to and including May 15. From then on, the tubers can be planted in the ground without any risk of frost and will flower approximately 60-90 days later.

Plant the tuber with its old flower stem from last year facing upwards, just 2 to 3 centimetres below the ground and keep a distance of half a metre from tuber to tuber.

The planting season is until June.

Where do you plant dahlias?

A dahlia prefers a sunny spot in nutrient-rich, water-permeable, preferably calcareous, sandy soil.
For pot planting it is best to use a pot that is at least 40 centimetres wide, so that it does not dry out too quickly in summer.

Dahlia topping

Topping a dahlia is a technique to stimulate growth and make the plant more compact and full. Dahlias are topped when they have reached a certain height, usually when they are in the active growth stage. We recommend allowing at least 2 to 4 pairs of leaves to grow before topping.

A leaf node is where a leaf is attached to the stem. Look at the top pairs of leaves on the stem. Use a sharp, clean pair of pruning shears and cut the stem just above a leaf node. Make sure to make a clean cut so as not to damage the plant. If there are flower buds below the topped spot, you can also remove them. This helps the plant to put more energy into developing side branches. After topping, the dahlia will begin to develop side branches from the leaf axils, resulting in a more floriferous plant.

How do I care for a dahlia?

Always keep the soil of the dahlia moist. Too dry soil can cause problems in growth and flowering. During flowering, the faded flowers are removed for new flowering. The dahlia flowers until the first night frost. Cut the plant back to the ground. Protect the tubers that are planted in the open ground with leaves in the winter against light frost. In severe frost, they should be stored frost-free in a dry place. The advantage of digging out is that the tuber can be divided every year. Feed the plant several times a year for an optimal result. The dahlia is a fast-growing plant that can use a lot of nutrition.

Overwintering dahlias

The dahlias will flower until the first frost in good conditions. Store the tubers in the winter in a frost-free, unheated place that is also well ventilated. It is best to wrap the tubers in paper such as a newspaper or keep the paper or jute bag that was obtained when you bought them. This prevents the tubers from drying out due to air circulation.

Propagation

In the autumn, the tubers continue to grow well. Do not remove the tubers from the ground too early for propagation. Just before the first frost is the best time. The tubers can be split immediately, but this can also be done in the spring. The advantage of splitting in the spring is that small growth points can already be seen in the spring. This makes it easy to recognize where the tuber can best be split.

Want to buy organic dahlias?

Good news! As of this year, due to a recently certified organic dahlia nursery, dark-leaved dahlia tubers can also be ordered at bloemoloog.nl.

Dahlia tubers are available at one of our markets throughout the spring. You can buy dahlias online from January to June at Bloemoloog.nl.

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Summer-flowering bulbs

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  • Organic summer bulbs

    Summer flowering bulbs and tubers are a promising and colourful addition to gardens, bringing them to life during the warmer months. Here you will find a wide range of flowers and plants that are planted in spring and produce beautiful flowers throughout the summer and autumn.

    Planting summer bloomers

    Planting summer flowering bulbs and tubers usually requires some preparation in the spring. They thrive in well-drained soil and generally require full sun or light shade.

    Pre-growing flower bulbs

    You can also choose to grow the frost-sensitive summer bloomers indoors from March, which is called pre-growing. The plant then has a head start and will flower earlier. You then place the pot in a light place in your room and keep the soil slightly moist. As soon as the night frost has gone, the pot can be placed outside or the flower bulb or tuber can be removed and replanted in the open ground. In that case, first keep the pot in a bucket of water for half a day and then plant the tuber in the open ground.

    Caring for summer bloomers

    Regular watering and removing faded flowers can prolong flowering. All summer flowering plants we offer can be cut back to the ground in the fall. For further instructions, we recommend reading the respective product descriptions for correct wintering.

    For organic potting soil, plant food and other soil improvers we recommend Bio Kultura !

    Summer buzzers

    The entire assortment of Bloemoloog is organically grown. This means you don't have to worry about whether it contains harmful substances for beneficial insects such as bees and other summer buzzers.

  • What summer bloomers are there and how do you choose the right one?

    There are many different types of summer bloomers, including annuals and perennials, also called perennials. Annual summer bloomers are plants that only bloom for one season, while perennial summer bloomers grow and bloom for several years. One must be dug up before the cold winter, while the other can, with the right care, remain in the same place for years.

    When choosing summer bloomers, it is important to consider the specific needs of the plants, such as water requirements, soil type and care.

    Below we discuss some popular summer bloomers and provide information on which location is best for them.

    Non-hardy perennial summer bloomers

    - Calla : Calla's also known as Zantedeschia's are summer bloomers with graceful leaves and unique flowers. These can be in the sun and partial shade.
    - Dahlia : Dahlias are a popular choice for summer bloomers and come in many different colors. They do well in full sun.
    - Gladioli : Gladioli are perennial, but not winter hardy. They grow best in full sun.

    Hardy perennial summer bloomers

    - Kniphofia : Kniphofia, also known as fire arrow, loves a lot of sunlight. Place the plant in a location where it gets at least 6 to 8 hours of direct sunlight per day. A sunny location ensures that the plant grows and blooms well.
    - Lily : Lilies are perennial summer bloomers that are often planted. These plants do well in full sun and in partial shade.
    - Peony : Peonies are well-known perennial summer bloomers. They bloom in the sun, but for longer flowering we recommend a semi-shaded spot.

    Want to buy summer bulbs?

    At Bloemoloog.nl you can order summer bloomers from January to June that are grown exclusively by organic growers. We deliver within 3 working days with PostNL!

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