About
Plectranthus grallatus is an evergreen Plectranthus producing the characteristic opposite, aromatic leaves and two-lipped, tubular flowers of the genus. A rewarding plant for a sheltered, sunny border or heated greenhouse.
About the genus
Plectranthus are annuals, evergreen perennials or shrubs with opposite, ovate or heart-shaped, sometimes fleshy leaves and two-lipped, tubular flowers in whorls forming spikes or panicles. Widely grown as houseplants, conservatory plants and in frost-free borders.
Growing conditions
SunlightFull sun, Partial shade
Soil typeLoam, Sand
Soil pHAcid, Alkaline, Neutral
Soil moistureMoist but well-drained, Well-drained
AspectEast-facing, South-facing, West-facing
ExposureSheltered
UK hardinessH2
Plant details
Plant typeConservatory Greenhouse, Shrubs
HabitBushy
FoliageEvergreen
Height1.5-2.5 metres
Spread1.5-2.5 metres
Time to full height2-5 years
Suggested usesPatio and container plants, Sub-tropical
Native toMozambique to S Africa
FragranceFoliage
Care notes
CultivationGrows best in full sun but does well in partial shade and can be planted outside after risk of frost has passed
PruningDeadhead spent racemes to promote flowering. To maintain compact, bushy growth prune established plants back by up to one-third at the end of winter before new spring growth begins`
PropagationPropagate by seed or from semi-hardwood or softwood cuttings
Pest resistanceGenerally pest-free
Disease resistanceGenerally disease-free