I think your best bet would be to plant these directly in the ground now--about 5 inches deep and 6 to 8 inches apart and in the shape of a triangle. Plant on the north side of a building where they would get morning and evening sun or a pretty well shaded cooler spot (if there is such a thing) where the hot sun will not heat up the soil. Your soil type in the Lake City, Florida is usually quite sandy with excellent drainage so no extra soil preparation is necessary, just water in well immediately after planting and keep barely moist until they come up. Do not fertilize until growing and then very sparingly with rose fertilizer. The blue/green mold you see is most often harmless and need not be removed unless you want to.
Lilies are generally easy to grow and for the most part maintainance free. However, some lilies do better in Florida than others. Most all lilies require cool temperatures during their seasonal resting period over the winter months. And during this time the bulb is setting it's flower buds internally. Asiatic lilies require a pretty good chill in order to flower properly the next year. I think at Lake City, you're still cool enough during the winter months to grow them successfully. Other lily types that would probably be a better choice for your area would be Longiflorum/Asiatic hybrid abbreviated LA , Oriental/Trumpet hybrid, abbreviated OT or Trumpets. Those do well anywhere north of a Tampa--Orlando line.
Others may have more suggestions as well so follow this thread a while--be careful though--lilies are habit forming. Ha Ha!
Edit Added: I forgot to mention something very important: Lilies (lilium) of this type do not like wet, soggy soil. These are not water lilies, and, contrary to popular belief--true lilies do not like a lot of water.
