As for the first part, Cost, Radiation exposure to humans, No water or heat, and unfit soil. As for the second, Astronomers, Botanists, and obviously your fair share of rocket scientists and math matitions for the way up.
Crocus, Chionodoxa, tulips (Tulipa), and some kinds of hyacinths (Hyacinthus orientalis) are among the plants that voles commonly damage. Snowdrops (Galanthus nivalis) are one type that voles don't eat, happily. The life cycle of grape hyacinths (Muscari botryoides) differs from that of other spring bulbs.
