How to Grow Viola
Viola cornuta
Viola cornuta is a compact, spreading perennial producing masses of small, lightly fragrant flowers in spring and again in autumn. Plant in sun or partial shade in moist, well-drained soil. Deadhead regularly and shear back after the main spring flush to keep plants bushy and trigger a second wave of blooms. Hardy down to around -15°C and ideal for edging, containers, and ground cover.
Yearly Lifecycle
Care Essentials
Feed with a balanced liquid fertiliser every 2-3 weeks during active growth and flowering flushes.
Watch For
- Aphids
- Slugs
- Powdery mildew
- Viola rust
Companions
Primula, Forget-me-not, Aubrieta, Spring bulbs
Care Requirements
Light
Full sun to partial shade
Prefers full sun in cooler climates but tolerates and appreciates afternoon shade in hot summers. At least 4 hours of direct light daily ensures the best flowering.
Watering
Regular moisture, avoid drought
Water regularly to keep soil evenly moist. Violas are not drought-tolerant and will stop flowering and go dormant prematurely if allowed to dry out, especially in containers.
Fertilizing
Balanced liquid feed every 2-3 weeks
Apply a balanced liquid fertiliser every 2-3 weeks during active growth and flowering flushes. Avoid high-nitrogen feeds which promote foliage over flowers.
Pruning
Shear after spring flush, deadhead throughout
Cut back by a third after the main spring flowering to encourage bushiness and a second autumn flush. Deadhead spent blooms regularly throughout the season to maintain tidy appearance and prolong flowering.
Spacing
20-25 cm apart
Space plants 20-25 cm apart to allow for their spreading habit while giving good coverage. Closer spacing creates a denser mat more quickly.
Support
No support needed
Viola cornuta is low-growing and self-supporting. No staking or tying is required.
Growing Tips
Shear for a second flush
Cut plants back by a third after the spring bloom fades. This removes tired stems and triggers a fresh flush of flowers in late summer and autumn.
Water in dry spells
Viola cornuta dislikes drought. Water thoroughly during dry periods, especially in containers, to prevent premature dormancy and extend flowering.
Divide every 2-3 years
Clumps become woody and less floriferous over time. Lift and divide in early autumn or spring to refresh vigour and increase stock.
Popular Varieties
Heartthrob
Compact viola with striking deep-purple and dark violet centre radiating outwards to rosy-pink petals with a distinctive dark face. Free-flowering and ideal for containers and border edging.
Spacing & Planting
| Plant spacing | 20 cm |
| Row spacing | 25 cm |
| Mature height | 20 cm |
| Mature spread | 35 cm |
Space 20-25 cm apart for good coverage. Mass-plant in drifts for the best display in borders and containers.
