How to grow Tulip 'Karel Doorman'
Keep in mind when planting that Karel Doorman is thought of as hardy, so this plant will survive close to or on freezing temperatures.
Growing Karel Doorman from seed
Try to aim for a seed spacing of at least 3.9 inches (10.0 cm) and sow at a depth of around 3.9 inches (10.0 cm).
Transplanting Karel Doorman
Ensure that temperatures are mild and all chance of frost has passed before planting out, as Karel Doorman is a hardy plant.
Harvesting Karel Doorman