Supplied as jumbo seedlings, these violas should be grown individually in pots within a frost-free environment, such as a cool greenhouse or a brightly lit windowsill, before being hardened off and planted outdoors. Plant them in compost or well-drained, humus-rich soil that is neither frozen nor prone to waterlogging. Protect young plants from slug damage using environmentally friendly slug pellets or beer traps. Deadhead spent blooms regularly to prolong the flowering period.