The Canna The President, a spring planted rhizome, 'Canna x generalis', produces beautiful red and yellow flowers. The red and yellow flowers are displayed amid broad green leaves. Cannas make great borders and bedding plants. Their vibrant colors and attractive foliage will demand attention where ever they are planted. Try a potted Canna for your deck or patio to add color and elegance. Few flowers are so dramatic and long blooming.