Ornamental · Violaceae
Viola
Viola cornuta
Plant them while it's cool and violas keep firing out cheerful, edible flowers from fall right through spring.
Full sun
39–70°F · 4–21°C
USDA 6–11
6–10 in · 15–25 cm
Overview
Few plants get a cool garden going like a viola. This low, tufted member of the violet family throws small flowers in nearly every color you could want, and it keeps at it for months. Tuck it along a bed edge, load up a window box, or pack a container, and it rewards the effort with almost no fuss.
There's a whole crew hiding under the name viola. The bedding types pile on masses of small blooms, the larger pansies bring the same genus at a bigger scale, and the wild Johnny-jump-up flings its tricolor faces around and reseeds itself all over. One trait drives the lot: they thrive in cool weather and bow out once summer turns hot.
Beginners take to these fast, and for good reason. Keep the soil moist, hand them sun or a bit of shade, snip the old flowers now and then, and they bloom on and on. Best of all, the flowers are edible, so the same plants filling the beds can jump straight onto a plate.
Care
The short version: give them full sun to part shade, keep the rich, well-drained soil moist, feed lightly once a month, and keep deadheading to push the cool-season flowers on and on.
Light
Violas hit their stride in full sun through the cool months, though they take partial sun or partial shade in stride. Once the heat climbs, an afternoon-shade spot keeps them pushing longer.
Water
Keep the soil consistently moist but never waterlogged and they power right along. Soggy ground fast-tracks crown and root rot, so water steadily and let the excess drain clear.
Soil
Set them in moist, fertile, well-drained soil loaded with organic matter and they take off. Just dodge waterlogged ground, which the roots flat-out refuse.
Temperature
These cool-season growers peak between 39°F to 70°F (4°C to 21°C). They shake off a light frost but stretch and slow once summer heat piles on.
Humidity
Everyday outdoor humidity is all they need, so skip chasing a number. Airflow does the real work, since crowded, damp leaves hand downy mildew an opening.
Feeding
Feed lightly across the growing season, about once a month, with a balanced fertilizer. Ease off the nitrogen, which drives leaves and shortchanges the flowers.
Pruning
Deadhead spent blooms often and the plant keeps cranking out flowers far longer. The Johnny-jump-up types reseed themselves, so leave a few blooms if you want volunteers popping up next year.
Size & spacing
They stay compact, hitting 6 to 10 inches (15 to 25 cm) tall and spreading 8 to 12 inches (20 to 30 cm) wide. That tidy size makes them naturals for edging, window boxes, and pots.
When to plant
Violas run hard in the cool stretches of the year and coast in summer, so timing pays off. Fire up seed indoors in late winter or sow it outdoors in late summer, plant out in early spring or fall while the air stays cool, and the flowers roll through spring and fall, often pushing right over winter in the mild zones 6 through 11.
Northern hemisphere
Southern hemisphere
Typical months for a temperate climate: start earlier in warm zones, later where spring frosts linger.
- Sow: 8 to 10 weeks before transplanting out in cool weather
- Plant: Early spring or fall while temperatures are cool
- Harvest: Spring and fall in cool weather; may persist over winter in mild climates and declines in summer heat
Hardiness
USDA hardiness zones: 6–11
Temperature: down to -23°C
Troubleshooting
Nearly every viola problem points back to one of two things, soggy soil or summer heat. Catch the early signals on the leaves and flowers and you can jump in before a plant gives up. Match your symptom below and move while it still counts.
Plants wilt and collapse with a blackened base
Let the soil stay soggy and crown and root rot moves in, dropping a plant almost overnight. Yank one up and the roots come away mushy and discolored, with rot right at the soil line. There's no rescuing it, so pitch it, fix the drainage before you replant, and back way off the watering.
Fix:
- Remove and discard affected plants
- Improve drainage before replanting
- Reduce watering frequency
Ragged holes in leaves or curling new shoots
Two pests crash the cool, damp weather violas love. Slugs rip ragged holes after dark and leave shiny trails, while aphids swarm the tender shoots and twist the buds. Pick the slugs off or drop some traps, blast the aphids clear with a hard jet of water, and bring in insecticidal soap only when a colony really digs in.
Fix:
- Hand-pick slugs or use traps and barriers
- Knock aphids off with a strong spray of water
- Apply insecticidal soap to heavy aphid infestations
Yellow patches above, gray fuzz beneath
Meet downy mildew, which pounces when the weather turns cool, wet, and humid. Flip a marked leaf and a grayish to purple fuzz shows up under the yellow patches. Pull the infected leaves, open the planting so air rushes through, and water at the base in the morning to keep the foliage dry.
Fix:
- Remove and discard infected foliage
- Improve air circulation and reduce leaf wetness
- Avoid overhead watering
Leggy, sparse plants as summer heat builds
Violas run on the cool season, so summer heat stretches them out and thins the flowers once it warms up. A quick shear plus deadheading can spark one last flush, and afternoon shade with steady moisture stretches the run a bit. In most gardens, though, the smart play is to pull them, drop in summer annuals, and set fresh violas out in fall.
Fix:
- Deadhead and shear lightly to encourage rebloom
- Provide afternoon shade and consistent moisture
- Replace with summer annuals once spent
Toxicity
Here the news is all good: violas are safe top to bottom. The ASPCA marks the plant non-toxic to cats, dogs, and horses, and the flowers are edible for people, so plant them anywhere pets and kids roam and enjoy the show.
Safe for
People · Cats · Dogs · Horses · Rabbits · Livestock · Birds
Cats None
Totally safe around cats. A nibbled leaf or flower won't cause any poisoning.
Dogs None
Dogs are in the clear too. The plant is non-toxic, so a curious chew does zero harm.
Horses None
Marked non-toxic to horses, so grazing near a planting is no problem at all.
Rabbits Safe
Rabbits can chow the leaves and flowers with no trouble whatsoever.
Livestock Safe
Cattle, goats, and sheep can graze around violas at no risk.
Birds Safe
Backyard birds and poultry can peck at the plant safely.
People Safe
The flowers are edible and a favorite garnish, so the whole plant is safe for people, kids included.
Varieties
Hundreds of violas are out there, but a handful of series and old favorites keep earning their spot. Get to know these first.
'Sorbet' series
A compact, free-flowering bedding viola bred to shrug off cold and bloom early across a wide sweep of colors.
'Penny' series
A small-flowered viola that performs evenly and vigorously right through spring and fall.
Johnny-jump-up (Viola tricolor)
A tricolor charmer in purple, yellow, and white that self-sows freely and spreads itself across the garden.
'Etain'
A fragrant, more perennial viola carrying soft creamy-yellow flowers edged in lavender.
How to propagate
Violas multiply with real ease, so go ahead and raise them from a seed packet, split an old clump, or root a few cuttings.
SeedEasy
Sow indoors 8 to 10 weeks before transplanting in cool weather, or direct sow in late summer for fall and spring bloom · 6 to 10 weeks to transplant size
Seed is the go-to, and it's a breeze. Kick it off indoors 8 to 10 weeks before you move plants out into cool weather, count on 6 to 10 weeks to reach transplant size, or direct sow in late summer for fall and spring flowers. The Johnny-jump-up types do the job themselves, self-sowing freely once they settle in.
DivisionEasy
Spring or fall · A few weeks
An established perennial clump splits fast in spring or fall. Lift it, pull it into sections, replant, and the divisions settle in within a few weeks.
Stem cuttingsModerate
Spring or early summer · 3 to 4 weeks to root
Cuttings take a steadier hand but pay off. Snip tip or basal cuttings from non-flowering shoots in spring or early summer, and they root in about 3 to 4 weeks.
Myths
Violas and pansies are the same plant.
They run close as cousins in one genus, but they're not swaps. Violas, the Viola cornuta types, crank out far more small flowers and shrug off a bit more heat, while pansies swap all that for a few much bigger blooms. Grab violas for a longer, tougher show and pansies for size.
Viola flowers aren't safe to eat.
The blooms are fully edible and turn up constantly as a garnish on plates and cakes. The plant sits non-toxic across the board. Both the flowers and the plant are safe, so grow them anywhere people and pets share the space.