Garden Scheme
Plant library · Annual Flowers
Begonia x semperflorens-cultorum
Wax begonia is a compact annual for bringing steady flower and foliage presence to partly shaded beds, borders, and containers. Growing about 1 foot tall and wide, it makes a low, mounded layer that can fill the front of a planting without blocking views into the bed. Its waxy leaves keep the planting visually defined between flowering flushes, while blooms continue from late spring into fall.
Space Wax Begonia 9 inches apart, measured center to center (23 cm).
The mature spread is about 12 inches (30 cm), so plants set at that distance grow together into a closed canopy over the bed.
Treat 9 inches as a planning baseline — cultivar and local growing conditions shift the final footprint.
Use wax begonia along the front edge of a shaded border, beside a path, or in broad drifts where a continuous low planting is wanted. Its compact form also suits window boxes, patio containers, and the outer ring of larger container arrangements. Keep the planting inside the bed line rather than letting it crowd a narrow path, and reserve a reachable edge for watering and removing tired annuals later in the season.[1][2]
Plant on 9-inch centers for a closely knit display. Each plant can reach about 1 foot wide, so this spacing allows neighboring plants to meet and form a continuous cover as they fill out. Lay out rows in a staggered pattern rather than a rigid grid for more even coverage. In a border, allow the outer plants to sit back from the path edge so the mature mound stays within the bed.
Place wax begonia in partial shade, especially where taller shrubs, structures, or tree canopy soften direct afternoon light. Maintain moderate, even moisture rather than allowing the root zone to swing repeatedly from wet to dry. A moist but well-drained planting area helps keep the compact foliage planting clean; avoid low pockets where water lingers after rain or irrigation.[1][2]
Wax begonia occupies its full planting space for one growing season, flowering from late spring through fall. Use it to bridge the long middle of the garden year beneath taller summer plantings or around shrubs that leave open ground at their base. Plan for replacement or bed refresh after the season, rather than assigning the same space to a permanent plant.
Avoid packing wax begonias into enclosed, poorly drained corners or crowding them beneath dense plants that make watering difficult. Their low stature can disappear behind rapidly expanding neighbors, so give them an open front-of-bed position and keep taller annuals or perennials behind them. In exposed sites, locate containers and bed edges where the fleshy stems and leaves are sheltered from strong wind.[1][2]