On Top® Pink Halo Tuberous Begonia

On Top® Pink Halo is a compact, mounded tuberous begonia with white petals edged in deep pink. PanAmerican Seed’s On Top® Series F1 is listed at 10–12 inches high and wide; Penn State’s 2019 shade-container trial recorded good flowering from July into early September. ## Flowers and form The [Penn State trial record](https://agsci.psu.edu/flower-trials/trial-year/2019/plant-name/begonia-on-top-pink-halo) identifies On Top® Pink Halo and reports 9 inches in height, 17 inches in width, and pink flowers in that trial. A [2020 Esbenshade grower catalog](https://www.esbenshades.com/content/Esbenshade_2020_Online_Liner_Catalog.pdf) identifies the PanAmerican selection as white with a deep pink edge. The dimensions on the trial and breeder’s series listing reflect different growing contexts, so this description keeps the separate measurements clear. ## Siting Tuberous begonias prefer partial or dappled shade and organically rich, moist soil with good drainage. They do not tolerate drought; protect foliage from strong wind and avoid waterlogged conditions that can rot tubers. On Top begonias tolerate more heat and sunlight than many tuberous types, but partial shade remains a dependable setting. ## Seasonal growing Tuberous begonias usually flower from early summer until frost. In cold-winter climates, move containers to a frost-free place or lift and store tubers dry before the first frost. ## Maintenance Check pots regularly, remove spent flowers and damaged leaves, and maintain air movement around foliage. Taper watering as leaves yellow in autumn. See [NC State Extension’s tuberous begonia guidance](https://plants.ces.ncsu.edu/plants/begonia-tuberous-types/) for general growing and storage advice.