Plant 2” deep after April 15th when the soil temperature warms up to at least 75 degrees. Consistently hot weather (day and night) is necessary for germination. The hotter the temperature, the faster they will grow. Bulbs can be planted in any direction. They will orient themselves as they sprout. If shoots are present when you get your bulbs, they should be planted upright for faster growth. Lack of water during germination can result in initially smaller leaves, hence my evening watering.
Although all caladiums will grow in the shade, some will do just fine in more light. Sun tolerant varieties include Aaron, Candidum, Lance Whorton, Festivia, Fire Chief, Florida Cardinal, Florida Sweetheart, Gingerland, Miss Muffet, Pink Beauty, Red Ruffles, Scarlet Beauty, Pink Symphony, Rosalie, White Wing, Postman Joyner.
One last tip, the larger the bulb, the more leaves; the larger bulbs are worth the extra money.
With Mother's Day coming up, an ideal gift for the mother you love who loves bulbs of any kind, buy her a bulb auger