How to grow Tulip 'Professor Röntgen'
Keep in mind when planting that Professor Röntgen is thought of as hardy, so this plant will survive close to or on freezing temperatures.
Growing Professor Röntgen 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 Professor Röntgen
Ensure that temperatures are mild and all chance of frost has passed before planting out, as Professor Röntgen is a hardy plant.
Harvesting Professor Röntgen