If your summer garden needs a pop of solid bright yellow, consider planting 'Aloha Canary Yellow' Million Bells, one of the brightest, cheeriest yellows you can find. This is the most vigorous grower of the Aloha series, growing about a foot tall and 18 to 24 inches wide. A wonderful filler and spiller in hanging baskets and container planters, its countless flowers will attract bees, hummingbirds, and butterflies. Calibrachoas need at least half-day sun, regular watering and fertilizing for the most prolific blooms. No need to deadhead, but a late summer haircut may encourage new growth that will last up until freeze.