About
A bushy perennial to 30cm, with coarsely toothed or lobed leaves and star-shaped, sky blue flowers 4cm across, from late spring to autumn.
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, Patio and container plants
ToxicitySkin irritant. Wear gloves and other protective equipment when handling
Care notes
CultivationGrow as summer bedding or container plant either on patio or under glass. Any well-drained soil in full sun is suitable
PruningDeadhead and trim as required
PropagationPropagate by seed or softwood cuttings
Pest resistanceGenerally pest-free
Disease resistanceGenerally disease-free