Snapdragon Potomac Early Rose Seedling Tray

You should maintain a media pH between 5.5 and 6.0 and provide a constant feed program of 150 to 200 ppm Nitrogen using a low-ammonium fertilizer . These plants require high light levels and long days to reach their full potential, performing best with daytime temperatures between 75 and 85 degrees Fahrenheit.

Pinching is not needed for this variety. Letting the plant develop on its own helps preserve its upright growth habit and encourages the long, straight flower spikes that make the Potomac series ideal for cut-flower production.

For best results, space Potomac snapdragons at 10 to 12 plants per square foot. This helps create a balanced crop canopy while still allowing air movement and sunlight to reach the lower portions of the plants. 

Regularly scout for common pests including aphids, thrips, spider mites, mealybugs, and whiteflies.

Be on the lookout for Botrytis, rust, powdery mildew, downy mildew, and various root or stem rots such as Pythium and Phytophthora. Avoid burying the stem below the soil surface to prevent stem rot . Maintaining good airflow and allowing plants to dry before nightfall will significantly reduce disease pressure.