Posted: 04/03/2016 at 08:35
Aym, not quite sure I understand you....."keep alive during the summer"? Do you really mean during the winter?
my tubers are 4 years old now, pretty big. I protect them over winter as I do with dahlias, viz., frost free and dry. Excellent value because the tubers increase in size every year. Mine are about 6"
In 3 or 4 weeks I will plant near the surface of good compost in a largish container. Add fish blood and bone and keep reasonably well watered. they will flower all summer into autumn.