The Exacum is quite an easy plant to grow and makes an ideal subject for a windowsill; several plants massed together in a large bowl look especially effective. The pretty blue, fragrant flowers cover the plant for many weeks in the summer, as long as it is not exposed to too much sun and not over-heated. The plant requires a high level of humidity and this can be maintained by standing the pot in a tray of moist pebbles. To prolong the flowering period, pinch out or cut off faded or fading flowers. This helps prevent the plant from producing seeds, which will reduce its flowering potential. The Exacum is usually treated as an annual and discarded once flowering has finished.

Plant type : Flowering plant with compact, bushy habit
Season of interest : Summer
Size : 15-30cm (6-12in)
Flower : Five-petalled, 1.5cm gin), scented, pale blue with yellow stamens
Leaf : Pointed oval, 2.5cm (1 in), glossy, green
Temperature : 15-2CTC (59-68째F)
Aspect/Light : Well-lit situation with some light shade
Humidity : High
Watering : Evenly moisten compost during growing period, but do not make too wet
Feeding : Once every two weeks with flowering plant fertilizer in growing period
Propagation : Sow seeds late winter to mid spring to flower early autumn of same year or sow early in autumn to flower following mid to late spring
Potting : Houseplant potting compost
Problems : Aphid
Availability : Quite often available late spring to early summer
Uses indoors : Good windowsill plant