Daylily
Hemerocallis 'String Theory'

Family: Hemerocallidaceae (hem-er-oh-kal-id-AY-see-ee) (Info)
Genus: Hemerocallis (hem-er-oh-KAL-iss) (Info)
Cultivar: String Theory
Hybridized by J. Trimmer
Registered or introduced: 2005
» View all varieties of Daylilies

Height:

36-48 in. (90-120 cm)

Spacing:

18-24 in. (45-60 cm)

24-36 in. (60-90 cm)

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:

Unknown - Tell us

Propagation Methods:

By dividing the rootball

By dividing rhizomes, tubers, corms or bulbs (including offsets)

Bloom Time:

Early midseason (EM)

Reblooming (Re)

Flower Size:

Large (more than 4.5" diameter)

Blooming Habit:

Diurnal (diu.)

Flower Type:

Crispate (pinched, twisted or quilled floral segments)

Unusual Form

Bloom Color:

Violet/Lavender

Dark Purple/Black

Color Patterns:

Self

Eyezone

Flower Fragrance:

No fragrance

Foliage Habit:

Evergreen (ev.)

Ploidy:

Tetraploid

Awards (if applicable):

Unknown - Tell us

Foliage Color:

Unknown - Tell us

Bloom Characteristics:

Unknown - Tell us

Water Requirements:

Unknown - Tell us

Where to Grow:

Unknown - Tell us

Regional

This plant has been said to grow in the following regions:

Stanford, California

Elizabeth City, North Carolina (2 reports)

Fremont, Ohio

Tomah, Wisconsin

Gardeners' Notes:

1
positive
1
neutral
0
negatives
RatingContent
Neutral

On Nov 19, 2014, DaylilySLP from Dearborn Heights, MI (Zone 6a) wrote:

Lavender with dark purple eye above green throat.
(sdlg Speedo)

Positive

On Jun 29, 2006, doss from Stanford, CA (Zone 9b) wrote:

String Theory (SpeedoXseedling) is 38" tall and has a 9" flower. Scapes are strong and because String Theory is hard to photograph, the plant is more beautiful than the photos. Highly recommended.