Longwood Canna RedText Box: LONGWOOD CANNA RED (Endeavor Red) Abundant blooms, spring through summer. Can grow to 6 ft. Water depth 2-6 inches. True aquatic canna hybrids. Weather permitting we ship the tropical marginal and bog plants April through September. OUR MARGINAL AND BOG PLANTS ARE EITHER IN 2 INCH POTS OR BAREROOT Tropical marginal and bog plants will not survive the cold temperatures, if you live in zone 7 and below you might consider them to be annuals or bring them indoors in the winter. September.