Forcing Dahlias, with their breathtaking colours and impressive flower shapes, are one of the most beloved flowers in Dutch gardens. However, these beautiful plants can be a challenge to grow in the cool, sometimes unpredictable Dutch climate. To extend the growing season and bring forward the flowering period, forcing dahlias is an excellent method that every gardening enthusiast should consider. In this blog, we dive deep into the process of forcing dahlias, so that you can still enjoy a lush, colourful garden this year.
Table of contents
What is dahlia favoring?
Forcing is the process of planting and growing Dahlia tubers indoors before planting them outside. By doing this, the plants get a head start on the growing season, causing them to flower earlier than if they were planted directly outside. This is especially beneficial in the Netherlands, where spring can start late and the risk of night frost can last into May.
Why favor dahlias?
The main advantage of forcing dahlias is the extension of the flowering period. Dahlias that are forcing indoors start flowering earlier and continue until the first frost, allowing you to enjoy their beauty longer. In addition, forcing offers the opportunity to inspect and select the tubers, allowing you to plant only the healthiest plants in your garden.
How do you prepare dahlias?
Tuber Selection: Begin by selecting healthy, mold-free Dahlia forcing tubers. Carefully inspect the tubers and choose those that feel firm and have no visible damage.
Preparation: Fill pots with a well-drained potting soil. Make sure the pots are large enough to accommodate the tubers without damaging them.
Planting: Plant each tuber in a separate pot, with the “eyes” or growing points upward. The tubers should be placed approximately 5 cm below the surface of the potting soil.
Watering and placement: Water the tubers moderately, enough to keep the soil moist, but not soggy. Place the pots in a warm, bright place, but avoid direct sunlight.
Care: Keep the soil moist and watch for signs of growth. Once the sprouts appear, make sure the plants get enough light to prevent them from growing tall and gangly.
Planting out: after the Ice Saints, mid-May, when the risk of night frost has passed, the pre-grown Dahlia can be planted outdoors. Acclimatize the plants first by gradually getting them used to the outdoor conditions over a week.
Tips for success
Timing is everything: start forcing Dahlias about 4 to 6 weeks before you plan to plant them outside.
Pay attention to the temperature: dahlias like warmth. Make sure the indoor temperature is between 18°C and 22°C for optimal growth.
Water wisely: avoid overwatering to prevent rotting of the tubers. Allow the soil to dry out slightly between watering.
Closing note
Forcing Dahlias Forcing Dahlias is a fantastic way to extend the flowering season and enjoy their beauty earlier in the year. With a little preparation and care, you can have these beautiful flowers in your Dutch garden well into the fall. Start forcing your Dahlias early this year and prepare for a season full of color and beauty.
