Cardinal Flowers depend heavily on hummingbirds for pollination, so don't be surprised if the Lobelia cardinalis brings some visitors to your garden. It produces 8-inch-long, red flower spikes.• Average mature height: 2 to 4 feet• Light: Full to part sun• Water: Prefers plenty of water. Does well in boggy areas.• Zones: 4-9

Plant Size
A baby plant, that is 3-8 inches tall, will arrive at your home in a 3-inch-deep pot. Then, raise your new baby to maturity under your caring, green thumb.