'Joan Senior' is a nearly white daylily, growing about 25 inches tall. It is a early-mid bloomer, and repeat bloomer. All daylilies have grass-like, green foliage that grows in clumps; fall color is yellow. Use at the front of shrub or foundation borders, in perennial gardens, or along paths. They are also great for those areas that get little care, such as the sides of garages, along the alley or driveway.
Grow in well drained soil in full sun to a little shade. The ideal soil is a loam-sand or clay-loam soil, though daylilies are very adaptive. Avoid overhead watering, as that can cause spots on the flowers, or cause them to wilt. As flowers along the scape are spent, you can break them off to keep a tidier appearance, or simply remove the entire scape after flowering is completed. Remove old foliage and any remaining scapes in late winter to early spring, as new foliage emerges. Very heat tolerant. Though moderately drought tolerant, adequate watering during the spring when buds are forming is essential to vigorous summer flowering. Daylilies are discribed as being early-, mid-, or late bloomers and refers to when they bloom compared to other daylilies. Generally, daylily season is June through August, so early is usually around June, mid is July, and late is August. 'Rebloomers' usually have a primery bloom, followed by intermittant blooming the remainder of the season.