Questions

I've been trying to buy madonna lily bulbs for over two years. Every garden centre says something different. If I ask in spring they say they come in in the autumn. If I ask in autumn they say they'll have them next spring. - When should I expect to be able to buy them, and when should they be planted?

I have lots of plants in the wrong places. Is there a rule of thumb about when shrubs and perennials and small trees can be moved? Is there a best-time-of-year, or is when they begin to die down - or is there no overall rule?