Route 66 Tickseed

Route 66 is a threadleaf coreopsis cultivar selected for golden-yellow flowers marked with burgundy-red near the center and along the petal tips. It forms an upright clump and flowers through summer, with an established hardiness record in USDA Zone 5. [ItSaul Plants](https://www.itsaulplants.com/plantname/Coreopsis-Route-66) lists a 24-inch height and spread, while the original cultivar patent describes plants about 24–28 inches tall and averaging 24 inches wide. ## Landscape Use Use Route 66 in sunny perennial borders or mass plantings where its fine foliage and changing flower markings can be seen up close. Its mature form is upright and clumping; allow about 24 inches for spread and leave room for neighboring plants. ## Growing Conditions Give it full sun and ordinary, well-drained garden soil. The seller reports average soil moisture needs. The patent describes flowering from June until frost; local timing varies with climate. ## Maintenance Water during establishment and extended dry spells, then adjust to rainfall and soil drainage. Remove spent flowers if you want to tidy the plant or limit seed set; cut back old stems after flowering or in spring. Avoid assuming drought tolerance from the cultivar description alone. [USPP20609](https://patents.google.com/patent/USPP20609P2/en).