Amaryllis

I bought 10 Amaryllis bulbs from a gardening co-op and they arrived last week. I planted 2 of them last weekend. I will plant 2 each week so that I have continuous blooms from end of Dec to Feb. It will take approximately 7-10 weeks to bloom. Based on my research they do well in pots but I am planning to put some on the ground to see how they do. They do not even need any soil, all the nutrients are contained within the bulb itself. My co-worker has one in a jar with glass stones.