Cosmic Solar Yellow™ Chrysanthemum

Cosmic Solar Yellow is a very late-season garden mum in Ball’s Cosmic family, with bright yellow decorative flowers and a medium-vigor European habit. The [Ball plant profile](https://info.ballseed.com/PlantInfo/?phid=043100001052028) lists it for sunny fall and late-summer displays, with dimensions of 14–24 inches tall and 20–36 inches wide. ## Landscape Use and Seasonal Interest Use Cosmic Solar Yellow in a sunny fall container, hanging basket, or border for a bright late-season accent. Ball describes the Cosmic family as closely timed and habit-matched, with good color retention for coordinated seasonal displays. ## Size and Siting Allow 14–24 inches of height and 20–36 inches of spread for the rounded mound. Place it in full sun; the Ball profile also identifies this selection as heat tolerant and attractive to butterflies. ## Soil and Water Choose fertile soil that drains well and retains even moisture. Water regularly during active growth and flowering, especially in containers, while allowing excess water to drain. Ball rates the plant for medium water needs. ## Maintenance Keep the root zone evenly moist during flowering and remove spent blooms as desired to tidy the display. [NC State Extension](https://plants.ces.ncsu.edu/plants/chrysanthemum-x-morifolium/common-name/mum/) recommends pinching garden mums in spring and early summer to encourage branching; stop pinching by mid-summer so flower buds can form. In colder regions, fall-purchased florist mums may be less reliable as long-lived perennials than plants established in spring.