How to Grow Begonia
Begonia
Perennial begonias thrive in partial shade with moist, well-drained soil, flowering prolifically from late spring through autumn in mild climates. In frost-free zones they are essentially evergreen and flower almost year-round. Water at soil level to avoid mildew, feed fortnightly during active growth, and deadhead spent blooms to keep them flowering. In areas with light frosts, mulch crowns heavily before winter and they will re-emerge in spring. Where hard frosts occur, lift tuberous types and store dry.
Yearly Lifecycle
Care Essentials
Balanced or high-potash liquid feed fortnightly from bud break through flowering. Reduce in late summer; stop when dormant.
Watch For
- Vine weevil
- Powdery mildew
- Grey mould (Botrytis)
- Slugs and snails
Pet Safety
Care Requirements
Light
Partial to full shade
Thrives in partial to full shade. Morning sun is fine but hot afternoon sun scorches foliage. Ideal under deciduous trees or on north-facing borders.
Watering
Evenly moist, water at base
Keep soil evenly moist but never waterlogged. Always water at soil level to avoid wetting leaves, which encourages powdery mildew and botrytis.
Fertilizing
Fortnightly liquid feed during growth
Feed every two weeks with a balanced or high-potash liquid fertiliser from bud break through flowering. Stop as growth slows in autumn.
Pruning
Deadhead regularly, cut back in autumn
Remove spent flowers throughout the season to encourage continuous blooming. Cut back untidy stems in late autumn. In warm climates a light trim after flowering encourages a second flush.
Growing Tips
Water at the base
Always water at soil level and avoid wetting leaves. Wet foliage encourages powdery mildew and botrytis, especially in humid conditions.
Deadhead to extend blooming
Remove spent flowers as soon as they fade. Regular deadheading keeps perennial begonias flowering for months rather than weeks.
Mulch for winter protection
In zones with occasional light frost, apply a thick layer of bark or straw over the crown in late autumn. Remove the mulch as new shoots appear in spring.
Feed during active growth
Apply a balanced or high-potash liquid feed every two weeks from bud break through flowering. Stop feeding as growth slows in autumn.
Spacing & Planting
| Plant spacing | 30 cm |
| Row spacing | 30 cm |
| Mature height | 35 cm |
| Mature spread | 30 cm |
Perennial begonias left in the ground in mild or frost-free climates. Tuberous types go dormant in winter; in warm zones they remain semi-evergreen and flower nearly year-round. Mulch crowns in autumn where light frosts occur.
