Question:
When can I plant cannas outdoors?Answer:
Canna rhizomes can be planted outdoors in mid-May in central Iowa (about one week earlier in southern Iowa and one week later in northern Iowa). The rhizomes should be planted 4 to 5 inches deep.
Cannas perform best in moist, well-drained soils in full sun. To promote growth, apply a balanced garden fertilizer, such as 10-10-10, to the area before planting and once or twice during the growing season.
Learn more about cannas in this publication: Cannas for Home Landscapes.
Last updated on
May 1, 2026