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Dahlias – growing new varieties from seeds

When dahlias are grown from seed, completely new varieties emerge, no two alike. From small to large, double, decorative or single, single-colored or multi-colored – dahlia seeds can make little floral miracles come true.

Ein blühendes Meer aus Dahlien.
© Garden Magic

Sowing and cultivation

The sun is getting stronger, the days are getting longer, the temperatures are getting milder, and March is the start of the growing season. In addition to vegetables, annual flowers, and perennials, dahlias can now also be started from seed.

There are three different ways to propagate dahlias: Tuber division and propagation from cuttings allow for pure breeding, while propagation from seed allows for the creation of entirely new varieties. The exciting thing about this is that until the flowers open, it's completely unclear what color and shape each variety will bring. A colorful grab-bag.

Rough coneflower - Rudbeckia hirta 'Sahara'
€4,50
Garden Strawflower - Helichrysum bracteatum 'Silvery Rose'
€3,50
Levkoje - Matthiola incana 'Iron Cherry Blossom'
€4,50
Summer phlox - Phlox drummondii 'Cherry Caramel'
€3,90

For sowing you will need potting soil, seed trays or plates, a ball shower or watering can and of course your seeds.

Scatter the seeds in potting soil and cover them lightly with soil. Dahlias like warm temperatures and prefer temperatures around 18-20°C. A warm windowsill, a mini greenhouse, or a heat mat are good options for maintaining a constant temperature.

© Garden Magic

Dahlia nursery

It's important not to let the soil dry out to prevent the germination process from being interrupted. Light is also essential for successful cultivation. A south-facing window or special propagation lamps prevent the seedlings from becoming "leggy," meaning they continue to grow vigorously and robustly, without having to invest energy in searching for light.

Once the seeds germinate after 7-14 days, the seed tray can be moved to a cooler location. Once the seedlings have formed their second pair of leaves, they can be pricked out into potting soil. This is important to ensure the plant has enough space and nutrients to grow into a strong young plant. To do this, use a dibber and carefully pry the plant out of the soil. Hold the plant by the leaves to avoid crushing the stem.

© Garden Magic

It will be out soon

Once the seedlings have grown well and are 10-15 cm tall, they can be pinched. To do this, use sharp, clean scissors or a knife and cut off the main stem above the second leaf axis. This branching will produce side shoots, making the dahlia more compact, bushy, and flower-rich.

At the end of April, the plants can be hardened off during the day at a temperature of 12 degrees Celsius so that they have a good start to the season.
Dahlias are not frost-hardy and should only be planted outdoors after the Ice Saints.

We wish you a successful start to your sowing and a wonderful, colorful dahlia season with many surprises!

>>You can get dahlia seeds from our dahlia field in our online shop <<

→ nächster Post: 10 tips for a bountiful tomato harvest
← vorheriger Post: Gardening tips in February: How to get started in the vegetable garden

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