Sue Sanderson – our horticulturist expert
Sue Says
These colourful shamrocks will die back naturally for a dormant period. Try growning Oxalis triangularis http://www.thompson-morgan.com/flowers/flower-plants/perennial-and-biennial-plants/oxalis-triangularis-burgundy-wine-large-plant/t56593TM as a frost tender plant, it is probably much tougher than this if it is grown in well drained soil. To be on the safe side move your containers to a frost free position, and cover the border grown plants with a thick, dry mulch of barks chips to keep them warm over winter. Wet soil will cause them to rot during dormancy. Whilst there is little control over this outdoors, container plants will benefit by keeping the soil just moist during their dormancy. Resume watering in spring when the new growth emerges.
