Here are the White Cultivars that had
20 or more days of flowers (as of 06-14-25).

Beautiful Edgings - 25 days
Diana Culbertson - 35 days
Early Snow - 21 days
Joan Senior - 26 days
Sunday Gloves - 32 days

Beautiful Edgings - 2 plants, (11 fans), 7 inch flowers, 30 inches tall, midseason, semi-evergreen, first bloom May 13, 25 days with flowers so far in 2025, still blooming, 26 days with flowers in 2024, 13 days with flowers in 2023, 77 days with flowers in 2022, planted 03-09-21, Oakes

Joan Senior - 1 plant (9 fans), 6.5 inch flowers, 26 inches tall, midseason, semi-evergreen, first bloom May 7, 35 days with flowers so far in 2025, still blooming, 30 days with flowers in 2024, 11 days with flowers in 2023, 1 day with flowers in 2022, produces new fans each year, planted 05-22-22, Smokey's

Early Snow - 6 plants (14 fans), large 7 inch flowers, 29 inches tall, early, dormant, bloomed May 10 to May 31, 21 days with flowers in 2025, 38 days with flowers in 2024, 31 days with flowers in 2023, 54 days with flowers in 2022, planted 2016 - Spring Hill, 10-11-20 - Breck's

Joan Senior - 4 plants (27 fans), 6 inch flowers, 25 inches tall, early midseason, evergreen, first bloom May 20, 26 days with flowers in 2025, still blooming, 87 days with flowers in 2024, 66 days with flowers in 2023, 98 days with flowers in 2022, planted 11-10-17, Spring Hill

Sunday Gloves - 4 plants (29 fans), 5.25 inch flowers, 27 inches tall, early midseason, dormant, first bloom May 18, 32 days with flowers in 2025, still blooming, 26 days with flowers in 2024, 36 days with flowers in 2023, 28 days with flowers in 2022, good fan divider, planted 11-09-19, Breck's