As the last leaves of the year come down, seed catalogs start arriving in my mailbox, and I plan for spring under the Bedding Plant Seeding Moon. Usually, I order a few packages of geraniums, coleus and petunias, and I start them under grow lights close to the furnace, which happens to be in the attic. If I keep the soil warm, well watered and close to the fluorescent bulbs, the seeds germinate within a week or so and then develop steadily throughout the winter. Although I enjoy the flowers that