Potomac™ Yellow Snapdragon

Potomac™ Yellow is an F1 snapdragon in [PanAmerican Seed](https://www.panamseed.com/Products/057801176006060/snapdragon-potomac-yellow/)’s Potomac cut-flower series, producing upright spikes of lemon-yellow flowers on tall, strong stems. It brings bright seasonal color to cut-flower rows, high tunnels, greenhouses, and sunny borders. ## Landscape Use The breeder identifies this exact cultivar as PAS3515, a Group 3/4 snapdragon for cut-flower production, with 39–60-inch stems. PanAmerican Seed describes Potomac plants as suited to high light, long days, and warm temperatures, with strong stems and long spikes; year-round production is possible in a greenhouse with supplemental high-intensity lighting. [Johnny’s](https://www.johnnyseeds.com/flowers/snapdragon/warm-season-groups-3-4/potomac-yellow-pelleted-f1-snapdragon-seed-1953P.11.html) Selected Seeds describes Potomac Yellow as cheery lemon yellow and suitable for field or greenhouse production. It also lists the F1 as annual and gives a shorter 32–48-inch plant-height range, illustrating how crop conditions and production goals affect finished height. ## Flowering and Siting The breeder lists late spring, summer, and late summer flowering and identifies an upright habit. [Illinois Extension](https://extension.illinois.edu/flowers/snapdragon) recommends full sun to light shade and moist, well-drained soil for snapdragons generally. It notes that the species favors cooler periods, so local garden bloom timing may differ from commercial schedules. ## Maintenance Keep soil moist but well drained during active growth. Remove faded spikes to promote rebloom. Tall plants may need staking where wind or heavy rain could bend the flower stems.