Container Floral Mix with ‘Bonfire’ Begonia and Petunias

New cultivar ‘Santa Cruz’

Bolivian begonias (Begonia boliviensis) are tuberous rooted types indigenous to the Andes Mountains in Bolivia and Argentina (USDA hardiness zones 9 to 11).  Plants grow rapidly and bloom non-stop from late spring to early fall. No deadheading of spent flowers is necessary. Bright red to orange flowers feature four long curved petals and lush medium-green pointed angel-wing foliage which cascades over the edge of the container. Additional floral color shades are becoming available.

They’re at their best planted in urns, window boxes or hanging basket as “spillers”. Plants arrive at area garden centers and greenhouses in mid- to late-spring. The 2-inch long tubular red-orange flowers form at the end of growing tips. Hummingbirds are attracted to the brightly colored flowers.

Bolivian begonias thrive in brightly lit areas ranging from full to partial sun and light shade. Potting media must be well-drained and monthly feeding and moderate moisture promotes greater flower numbers. Feed regularly with water-soluble fertilizers such as Miracle-Gro™, Daniels™ or Jacks™. Begonias do not tolerate overwatering and poor drainage leads to root rot problems.

In areas with mild winters (zone 7b and further south), plant(s) may be stored in an unheated garage in a semi-dormant state. Cut the plant back to within 2-3 inches of the soil line in late fall. Re-pot older plants into new soilless media. In northern zones, move container(s) into a greenhouse or sunroom over winter. To spur new growth, move plant(s) outside and begin watering and feeding.

Leading cultivars are orange flowering ‘Bonfire’ (vegetatively produced) and red-orange ‘Santa Cruz’ (from seed). Other available B. boliviensis series include Copacabana® and Sparkle®.

In late fall you may opt to start new plants to grow in a heated hobby greenhouse. Vegetative cuttings of Begonia boliviensis root easily.