Posted: 28/09/2013 at 21:58
I leave my dahlias in the ground in winter and most survive. Arabian nights, Park Princess, Bishop's Children (that I grew from seed) and some others even survived the year it was -17°! Pooh and the others I planted last year (forgotten names) all survived -10°. I live in Dordogne, winters are usually colder than in UK, last winter and spring were very wet, but years of manure and limestone rock under the earth mean my beds are well drained, although it was clay to start with.