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