Your calla lilies are beautiful!!! And since you know so much about them, maybe you can give me some help on this...
Several years ago a friend gave me a potted calla lily from a florist. It was only in a 4" pot and the bulbs were planted very shallowly... the leaves were less than a foot tall and the flowers were smaller and burgundy. I grew it through the summer, then I let it go dormant for the winter but kept it potted as it was and grew it again the next summer with the same result: leaves less than a foot tall and the flowers were again burgundy.
Again I kept it dormant through winter '11-'12... but I read that callas like to be planted much deeper (4" - 6" I think) so I repotted the bulbs deeper into a large pot and grew it through the summer of '12. It never did bloom last year but the leaves were enormous compared to the previous years... at least 2 - 3 feet long and larger! So again it was dormant in its pot through this past winter. For some dumb reason I decided to give it just a *bit* of water in February and it started to grow immediately, so I moved it to a south-facing window. Within about a month I had those large leaves again -- and at least a dozen flowers -- but they're the wrong color! The flowers are now white/pink! It is still blooming profusely indoors. Here's a pic:
So, I'm wondering if it was wrong to plant them deeper... I've since read that only certain types of callas like to be planted that deep, and I have no idea what mine are. I'm also wondering why the flowers are a different color than the original burgundy!
Thanks for any help! I'm not much on tropical plants, but my friend LOVES them and she's always buying me stuff like this.