Yellow bell bush (Tecoma stans) dresses up the landscape with the large, tropical-looking flowers. This broad-leaf evergreen looks most striking in late summer and early fall when the yellow flowers bloom in abundance, hanging in thick clusters. Though mostly well behaved, yellow bell bush can be invasive in some tropical and subtropical climates. This shrub makes a great specimen shrub, or use it to create an evergreen, flowering hedge. As long as yellow bell bush gets at least six hours of sun per day, more is better, this shrub will thrive with minimal care.
Water yellow bell bush during the growing season, from spring through late fall, every seven to 10 days. Soak the soil slowly with each watering, until it is damp at least 12 inches deep. When you water, you can test the depth of moisture penetration by digging a small hole next to the plant using a trowel. Just be careful not to disturb the roots.
Fertilize with a general purpose plant food every four to six weeks to get the best growth and flowering. Mix 1 tablespoon of fertilizer in a gallon of water, and pour it on the soil at the base of the plant out to the drip line. Coordinate fertilizer application with regular watering to improve the absorption of nutrients. Fertilizers vary from product to product so if the package label indicates a specific dilution amount, follow those directions.
Prune yellow bell bush in the spring using pruning shears for small branches or a pruning saw for larger branches. Cut out all dead or frost-damaged growth. Prune the canopy to the shape and size you want. This shrub can tolerate heavy pruning. In frost-prone areas, wait until after the last anticipated frost date to prune.
Clip off the seedpods to prolong flowering. The seedpods hang in clusters as the flowers fade. By removing them, you stimulate new flowers.