About
An evergreen, tender perennial often grown as an annual, to 40cm tall and wide, with lobed leaves. The blue, star-shaped flowers are up to 3cm in diameter and borne from late spring into summer.
About the genus
Isotoma can be annuals or perennials, with pinnately lobed leaves and long-tubed, salver-shaped flowers
Growing conditions
SunlightFull sun
Soil typeChalk, Clay, Loam, Sand
Soil pHAcid, Alkaline, Neutral
Soil moistureMoist but well-drained, Well-drained
AspectSouth-facing, West-facing
ExposureExposed, Sheltered
UK hardinessH3
Plant details
Plant typeAnnual Biennial, Conservatory Greenhouse
HabitBushy
FoliageEvergreen
Height0.1-0.5 metres
Spread0.1-0.5 metres
Time to full height1-2 years
Suggested usesCity and courtyard gardens, Cottage and informal garden, Patio and container plants
Native toAustralia
ToxicitySkin irritant. Wear gloves and other protective equipment when handling
Care notes
CultivationGrow in any moist, free-draining soil in full sun
PruningDeadhead and trim as required
PropagationPropagate by seed or from softwood cuttings
Pest resistanceGenerally pest-free
Disease resistanceGenerally disease-free