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Hardiness: USDA Zone 5a: to -28.8 °C (-20 °F) USDA Zone 5b: to -26.1 °C (-15 °F) USDA Zone 6a: to -23.3 °C (-10 °F) USDA Zone 6b: to -20.5 °C (-5 °F) USDA Zone 7a: to -17.7 °C (0 °F) USDA Zone 7b: to -14.9 °C (5 °F) USDA Zone 8a: to -12.2 °C (10 °F) USDA Zone 8b: to -9.4 °C (15 °F) USDA Zone 9a: to -6.6 °C (20 °F) USDA Zone 9b: to -3.8 °C (25 °F) USDA Zone 10a: to -1.1 °C (30 °F) USDA Zone 10b: to 1.7 °C (35 °F)
Sun Exposure: Full Sun Sun to Partial Shade
Soil pH requirements: 6.1 to 6.5 (mildly acidic) 6.6 to 7.5 (neutral) 7.6 to 7.8 (mildly alkaline)
Patent Information: Non-patented
Propagation Methods: By dividing the rootball
Bloom Time: Early midseason (EM) Reblooming (Re)
Flower Size: Large (more than 4.5" diameter)
Blooming Habit: Diurnal (diu.) Extended (ext.)
Flower Type: Single
Bloom Color: White/Near White
Color Patterns: Self
Flower Fragrance: No fragrance
Foliage Habit: Evergreen (ev.)
Awards (if applicable): Lenington All-American Award (or runner-up) Award of Merit (or runner-up) Honorable Mention Junior Citation
On Sep 10, 2009, CalamityJeanne from Duluth, MN wrote:
I planted Joan Senior in spring 2008. She didn't do much that first year--I think I got a total of three blooms--but she took hold, overwintered nicely, and bloomed profusely this year. This was a strange summer, weatherwise. It was very cool and many perennials bloomed very late, while others were right on schedule. Three days after Labor Day 2009 Joan Senior still has two or three buds.
On Jan 28, 2009, FrillyLily from springfield area, MO (Zone 5b) wrote:
I gave this a neutral because the blooms do not get quite as big for me as listed. It is a very heavy bloomer for me. There are now many more whites to chose from and JS is not that ruffled or remarkable compared to some of the others now available. The plant increases fast for me.
On Jan 23, 2009, Mainer from Durham, ME (Zone 3a) wrote:
Joan Senior was a very slow starter in my garden but now it is looking like it should. Hardy enough to stay in my wooden raised beds and blooms at the same time as my red Sphinx lilium so the white will be lovely with those double red lilium.
Aparently it needs growing conditions which the south side if my house never provided. It grew rather slowly for me and always flowered but never profusely. Bud count was quite low for a modern daylily and the flower size never reached the reported six inches, three and a half to four was the norm. I bought it from Oakes so I'm reasonably certain I had the correct variety but I babied it for three years and then replaced it with something which should be more productive.
I stuck this one in very heavy clay soil, in a very crowded bed, tucked under a butterfly bush. Geez, is it ever a beautiful surprise when one walks around the bend and discovers it! It's creamy off-white blooms are stunning!
too bad there isn't a choice for "very positive". lots of daylilies are pretty and good in the garden, but this one really stood out for lots of reasons. each double fan put up a single, sturdy scape, one scape had a large proliferation on it. fbo was 7/4 and the total bloom period was 35 days. the blooms are a beautiful light ivory with a hint of pink, sometimes recurved, sometimes not. it set pods like a fiend, and the pods were huge. it doesn't hold up well when watered, but it doesn't completely disintegrate like some, either. the literature says that it is very vulnerable to insect damage, however this year in my garden i didn't notice anything along those lines. popular for many years, and for good reason.
This plant has been said to grow in the following regions:
, Kinsey, Alabama San Jose, California Yorba Linda, California Federal Heights, Colorado Waterbury, Connecticut Bartow, Florida Tallahassee, Florida Richmond Hill, Georgia Tucker, Georgia Eastport, Idaho East Hazel Crest, Illinois Galva, Illinois Jacksonville, Illinois Oak Park, Illinois Peoria Heights, Illinois Elkhart, Indiana Gulivoire Park, Indiana Solsberry, Indiana Cedar Rapids, Iowa Nichols, Iowa Ewing, Kentucky Hebron, Kentucky Salvisa, Kentucky Durham, Maine South China, Maine Adamstown, Maryland Clawson, Michigan Dearborn Heights, Michigan Gladwin, Michigan Royal Oak, Michigan Arnold, Minnesota Excelsior, Minnesota Waynesboro, Mississippi Brunswick, Missouri Evergreen, Missouri Auburn, New Hampshire Endicott, New York Southold, New York Waterville, New York Chapel Hill, North Carolina Oxford, North Carolina Raleigh, North Carolina Ravenna, Ohio Rockbridge, Ohio Uniontown, Ohio Hulbert, Oklahoma Renfrew, Pennsylvania Columbia, South Carolina Conway, South Carolina North Augusta, South Carolina Simpsonville, South Carolina Middle Valley, Tennessee , Texas Houston, Texas Richmond, Texas Henrico, Virginia Linden, Virginia Stuarts Draft, Virginia Allouez, Wisconsin