These cheery bloomers light up cool days with happy colors. See some of our favorite varieties
• Give them regular water and full to partial sun (partial shade in warmer areas).
• They thrive where winters are rainy and cold, growing well in all zones except the low and intermediate desert.
• Find Penny series viola seedlings at most garden centers.
Companies such as Park Seed (parkseed.com or 800/845-3369) and Thompson & Morgan (tmseeds.com or 800/274-7333) sell seeds of other varieties.