- You will get 50+ Seeds of Utah Northern Sweetvetch Flower Seeds. - Seller Notes: “Hedysarum boreale. U.S. grown seed. Tested 1/23-Germination 93%. Packed 1/23.”. - Planting Time: Perennial. - Soil Type: Poor soils, Chalk, Clay, Loam, Peat, Sand. - Life Cycle: Perennial. - Soil pH: Neutral. - Watering: Light. - Sunlight: Full Sun, Medium Sun. - Utah Sweetvetch-Aka Northern Sweetvetch. This long-lived perennial wildflower, native to the Intermountain West, can be found throughout the western United States. First described by botanist Thomas Nuttall back in 1818. This legume wildflower has a deep tap root system making it heat /drought / flood / fire tolerant. It rarely gets over 3 ft tall and has a low, spreading growth habit. Utah Sweetvetch produces bright pink pea-like flowers which bloom from spring to autumn. It prefers full sun but can handle partial shade. Rocky, well-drained soils are also the preferred conditions for this wildflower. Use in rock gardens, wildflower mixes, and groundcover. 50+ seeds per order. - Hedysarum boreale. - Perennial. - Full sun / Part sun. - Spring. - Soil Temp 70F+. - Pour Hot Water on Seeds and Let Soak 24Hrs. - SOW- 2/3 seeds per, 1/4" deep, 18" apart. Keep moist. - Germination 30+ Days. - Light water. - Height 24" - 36" x 18" wide. - Flowers are pink. Blooms summer through fall. - This is slow growing, long lived perennial. The first 2 yrs. are spent developing an extensive tap root system. These may not bloom until years 2 or 3.