Potomac™ White Snapdragon

Potomac™ White is an F1 snapdragon from [PanAmerican Seed](https://www.panamseed.com/Products/057801176005863/snapdragon-potomac-white/)’s Potomac cut-flower series, producing upright spikes of white flowers on tall, strong stems. The clean flower color works in cutting gardens, high tunnels, greenhouse crops, and mixed borders where a pale vertical accent is useful. ## Landscape Use The breeder identifies the exact cultivar as PAS1237593, a Group 3/4 cut-flower snapdragon with 39–60-inch stems. Potomac is bred for high light, long days, and warm temperatures, and PanAmerican notes that greenhouse production can continue year-round with supplemental high-intensity lighting. [Morning Star Seed Company](https://morningstarseedcompany.com/products/antirrhinum-majus-f1-potomac-white) describes Potomac White as white with a yellow touch, with a 39–60-inch height and full sun to part sun. The height range applies to specialized flowering stems; site and crop conditions affect the finished plant. ## Flowering and Siting PanAmerican Seed lists late spring, summer, and late summer flowering, and describes the habit as upright. For species-level garden care, [Illinois Extension](https://extension.illinois.edu/flowers/snapdragon) recommends full sun to light shade and moist, well-drained soil. Snapdragons generally perform well in cooler parts of the year, and their local bloom calendar varies with climate. ## Maintenance Keep soil moist but well drained during active growth. Remove faded flower spikes to encourage rebloom. Tall cultivars may need staking in exposed places, especially when flower spikes are heavy or weather is windy.