Some dahlia questions
I love dahlias! Last year some inexpensive dahlias provided me with an unbelievable amount of flowers after the second year of planting. This year I replanted those shallowly (just covering them basically) and also got some "name" dahlias from Swan Island. They were much smaller, as expected, than what I had over-wintered. The directions said to plant them six inches so I did. My dahlias from last year are almost all growing, some flowering and some not. One of my new Swan Island dahlias is not growing at all and one seems stuck at one inch. Only one of the new ones have flowered but the others are at least growing although most are pretty short. So....my questions are:
1) How deep should I plant the dahlias? Just under the surface or six inches?
2) When can I and should I separate the tubers when I take them out? I did not do so last year since I didn't quite know what to do, but I am glad to if it is a good idea or to share some.
3) Should I fertilize with Miracle Grow or something else if the plants are a decent size?
4) Usually I just put the tubers in buckets and put them in the back of my garage where it is cool but not freezing. I also do this with cannas and glads. Is it better to put the tubers in peat moss or vermiculite (or something else)?
Thanks in advance for your help.