Wax begonia

Sun

Partial shade or morning sun; tolerates full sun in cooler climates if the soil stays moist. Provide afternoon shade in hot regions.

Water

Keep moderately moist, allowing the surface to dry slightly between waterings. Avoid saturated soil and standing water in pot saucers.

Soil

Well-drained, humus-rich soil; use a free-draining potting mix in containers.

Height

1-2 ft (0.3-0.6 m)

Spread

1-2 ft (0.3-0.6 m)

Flowers

Small white or pale pink flowers with yellow centres from late spring until frost; flowering can continue much longer in frost-free conditions.

Foliage

Evergreen. Glossy, fleshy green leaves with an uneven base and softly toothed edges, sometimes flushed red or bronze.

Growth

Moderate to fast during warm weather.

Care needed

Low

• Plant out after the last frost, once nights are consistently mild.
• Water at soil level when the surface begins to dry; keep the root zone moist but not soggy.
• Feed container plants every four weeks during active growth with a balanced liquid fertiliser at the label rate.
• Apply a thin mulch around bedding plants, keeping it clear of the stems.
• To overwinter, move a potted plant into a bright, frost-free position before cold weather and reduce watering.

Pruning. Pinch young shoot tips in spring or early summer to encourage branching, and trim leggy stems just above a leaf joint. Remove damaged or rotting growth promptly; routine deadheading is usually unnecessary.

Late winter

Sow seed indoors on the surface of moist seed compost with warmth and bright, indirect light.

Spring

Pot on young plants and pinch shoot tips if growth is lanky.

Late spring

Harden off plants gradually and plant outdoors after frost danger has passed.

Summer

Check containers frequently for dryness and feed monthly during active growth.

Early autumn

Take stem cuttings or bring selected plants under cover before cold nights.

Winter

Keep overwintering plants bright and frost-free, watering sparingly without letting the root ball dry completely.

• Edge lightly shaded paths with repeated groups for a low, continuous band of flowers.
• Fill pots and window boxes with upright plants alongside trailing ivy or lobelia.
• Plant beneath open-canopied shrubs where there is bright filtered light and little root competition.
• Combine with coleus and ferns for contrasting leaf colours and textures in sheltered summer displays.

Garden styles it suits: Traditional, Formal, Victorian, Modern courtyard, Small-space and Tropical.

Plant it with: Coleus, Impatiens, Lobelia, Maidenhair fern, Torenia and Sweet alyssum.

Wildlife: Open flowers may attract small insects, but this is not a major wildlife food plant. It is not a native host plant in the United States, the United Kingdom, Canada or Australia.

• Root or stem rot: improve drainage, empty pot saucers and let the soil surface dry slightly between waterings; discard badly rotted plants.
• Powdery mildew: improve spacing and airflow, avoid overcrowded sheltered corners and remove badly affected leaves.
• Slugs and snails: protect young plants with hand-picking, traps or an approved bait used according to its label.
• Leaf scorch: move pots out of strong afternoon sun and maintain even moisture during hot weather.

Toxic to cats, dogs and horses if eaten, with the highest concentration of harmful oxalates in underground parts. Ingestion can cause salivation, vomiting and other digestive upset; substantial ingestion can be more serious. It is not a safe edible plant for people and may irritate the mouth or stomach. Seek veterinary or medical advice after significant ingestion.

Where it spreads. Escapes cultivation and can spread in damp, shaded habitats in Florida and Hawaii, and is naturalised in parts of eastern Australia, including Queensland and New South Wales. Avoid planting beside bushland or waterways where it is spreading, and do not dump garden waste.

• Bedding begonia (Begonia Semperflorens Cultorum Group)

  These closely related garden hybrids are often sold under the same common name. Many are shorter and more uniform, with bronze foliage or stronger red flowers, but appearance alone cannot reliably separate every hybrid…

• Tuberous begonia (Begonia Tuberhybrida Group)

  Usually has much larger, showier flowers and grows from a tuber, with a distinct dormant season. Wax begonia has small flowers and fibrous roots.

• Angel-wing begonia (Begonia coccinea)

  Has taller, cane-like stems and elongated, pointed leaves rather than the wax begonia's smaller, rounded leaves and bushy habit.

Begonia honours Michel Bégon, a French administrator and patron of botany; cucullata means hooded, while wax begonia refers to the glossy, wax-like leaves.

Propagation. Take soft stem cuttings in spring or summer and root them in moist, free-draining propagation mix. Seed needs light to germinate, so sow on the surface; seedlings from garden hybrids may differ from their parents.

Accepted botanical name

Begonia cucullata

In the US and Canada

Introduced in Hawaii, the lower 48 states and Puerto Rico.

Native range

Argentina Northeast, Argentina Northwest, Bolivia, Brazil Northeast, Brazil South, Brazil Southeast, Brazil West-Central, Paraguay and Uruguay.

Sources: GBIF (CC BY 4.0), USDA PLANTS and Trefle (CC BY 4.0). The care and design notes are LandscapeGPT's own.