Coreopsis x 'Jethro Tull'
Common Name(s):
Jethro Tull Coreopsis
Tickseed
Synonym:
Butter Daisy
Flower:
Yellow
Blooms :
Jul
to:
Sep
Flowers (each to 2" diameter) feature tubular golden-yellow rays that are fluted toward the apex. Rays surround darker yellow center disks.
Botanical Description
Fragrant?
NO
Family:
Asteraceae
Herbaceous Plant, Perennial
Foliage:
Green
Elliptic green leaves (to 3" long).
Fall Color?
YES
Golden blooms stretch into fall
Photo by:
Heading 6
Oregon Native?
NO
West State Native?
NO
Origins:
It is a hybrid cross of Coreopsis auriculata 'Zamfir' (female parent) and Coreopsis lanceolata 'Early Sunrise' (male parent).
Site Selection
Minimum USDA Hardiness Zone:
5
Water Needs:
L
Sun Needs:
Partial Sun
Deer Resistant?
YES
Firewise?
YES
Height:
15-18"
Spread:
18-24"
Growth Rate:
Medium
Native Habitat:
Coreopsis is a genus of between 75-80 species from North America, Mexico, Central and South America.
Soil:
Easily grown in dry to medium moisture, well-drained soils. Tolerant of dry soil, Shallow-Rocky Soil
Care Recommendations
Maintenance Level:
Medium
Fertilizer:
Feed lightly once a year in spring
Mulch:
Shredded bark or light compost
Plants will spread by rhizomes. Clumps may be divided in spring. When grown in borders or other formal garden areas, division may be needed every 2-3 years to maintain robustness.
Long Term:
Winter:
Aooly a 2-3" layer of mulch, make sure soil in well-drained
Spring:
Cut back dead foliage to 2-3" above soil, devide every 2-3 years, ensure well-drained soil, apply balanced slow-release granular fertilizer when new growth appears, give full sun
Summer:
Plants may be sheared in mid to late summer to promote a fall rebloom and to remove any sprawling or unkempt foliage.
Fall:
Cut back plant 2-3" above soil, leave foliage standing, taper off irrigation, can divide
General Care Comments:
Plant in full sun, poor sandy or rocky soil, water deeply but infrequently, snip spent blooms, shear back by 1/2 in mid-summer, divide evey 2-3 years
Common Problems
Plant stems tend to sprawl, particularly in hot and humid climates with periodic heavy summer rainfall.
Diseases:
Uncommon diseases include botrytis, aster yellows, powdery mildew and fungal spots.
Insects:
Aphids, spider mites, spotted cucumber beetles
Environmental Problems:
Crown rot may occur in moist poorly drained soils
Pests:
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