I am a gardening newbie, I container garden in the city, but my first garden last year did great! Now I want to expand and the only way to go is up (hanging). I would like advice on the best way to go about planting salad greens in hanging baskets. Do I need to look for specific varieties that would work better for hanging? I found this http://rainyside.com/container/MossLettuceBasket.html Are these good instructions?