- You will get 101+ Seeds of Pontentilla Scarlet Cinquefoil Flower Seeds. - Seller Notes: ?potentilla thurberi. U.S. Grown seed. Tested 1/23-Germination 93%. Packed 1/23.?. - Planting Time: 8 Weeks. - Soil Type: Clay, Loam, Peat, Sand. - Life Cycle: Perennial. - Soil pH: Neutral. - Watering: Medium. - Sunlight: Full Sun, Medium Sun. - Scarlet (Potenilla) Cinquefoil-All good gardeners love the Potentillas, and here's why: they cover themselves with scarlet flowers from early to late summer, while most other perennials bloom just a couple of weeks. What's more, potentillas are short (about 2 ft.) shrub-like relatives of roses, and if you look closely, you'll see that each brilliant 5-petaled flower looks just like a single wild rose. They're great additions to any perennial garden. Easy to grow from seed. Low maintenance. 100+ Seeds per order. - Potentilla thurberi. - Perennial. - Full sun / Part sun. - Spring. Soil temp 70F+. - SOW- Press 2/3 seeds per into soil, 16"apart. Keep moist. - Germination 14-28 days. - Medium water. - Flowers are scarlet. Blooms early summer through fall. - Light fertilizer every 30 days will increase blooms.