Happy Days™ Yellow Dahlia

Happy Days™ Yellow Dahlia (70082954) is the yellow-flowered selection in Syngenta’s mounding Happy Days™ series, known for nearly black, dissected foliage. The product profile lists a 10–14 inch garden height and width, part sun to full sun, flowering from mid-spring through summer, and hardiness zone 10a ([Happy Days Yellow](https://www.syngentaflowers.com/ams/product/flower/70082954)). Use it in a container or sunny border. ## Growing Conditions Grow in fertile, moist but well-drained soil and full sun to partial shade. Keep plants watered through hot, dry periods and mulch the root zone to help retain moisture. The manufacturer also notes the series’ well-branched habit and suitability for landscape plantings and pots. ## Maintenance Deadhead faded flowers to encourage continued bloom. In cold-winter gardens, lift tubers after frost, dry them, and store them in a cool, dry medium; in milder zones, mulch tubers over winter. Dahlias can also be treated as seasonal annuals. See [NC State’s Dahlia growing guidance](https://plants.ces.ncsu.edu/plants/dahlia/common-name/bedding-dahlia/).