Dear All One of my best plants is Dahlia coccinea var palmeri from a CDR collection from Mexico. It is a tall but dainty plant with finely dissected leaves and flowers best in autumn when the weather gets cool and damp. It has horizontally facing cosmos like bright orange red flowers. it produces a lot of seed and young plants tend to germinate in summer where the plants were the previous year, the tubers are not hardy, though. I have donated this seed several times to the IBS SX and may do so this year to the PBS SX if no disaster strikes. For tuberous Begonias....... yes there are people out there who like them, but I am interested in SPECIES tuberous Begonias. I know there are some very beautiful ones but impossible to come by....... Anyone who can help? greetings from cold "mid summer" Germany, Uli