If you have purchased hanging baskets or nursed them through the winter, be sure to watch the weather closely.  You can hang them outside during the warm days we are having, but if the nights get below 40 degrees, you need to bring them inside.  You especially need to bring them inside if your baskets are a type of fern or foliage which are tropical plants.  Some baskets like Wave Petunias, Calibrachoas and Fuchsia can handle cooler temperatures down to 35 degrees.