Size: To 4 feet tall and 3 feet wide Growing Conditions: Full to part sun in moist, well-drained soil Buy It: Happy Returns Daylily ($20, The Home Depot) Test Garden Tip: Sea oats can be an aggressive spreader in the garden; prevent reseeding by cutting off seed stalks in late summer. Size: To 5 feet tall and 30 inches wide Growing Conditions: Full sun to part shade in moist, well-drained soil; drought tolerant once established Size: To 3 feet tall and 2 feet wide Growing Conditions: Full sun in moist, well-drained soil Size: To 3 feet tall and 2 feet wide Growing Conditions: Full sun to part shade in average soil; can tolerate poor soils and drought Buy It: Goblin Gaillardia ($15, Breck’s) Size: To 3 feet tall and wide Growing Conditions: Full sun in well-drained, average soil; can tolerate drought Buy It: New Vintage Red Yarrow ($11, Etsy) Size: To 3 feet tall and 4 feet wide in most conditions Growing Conditions: Full sun in moist, well-drained soil Zones: 8-11, but grown as an annual in colder regions Buy It: Lantana Mix ($19, The Home Depot) Size: To 1 foot tall and wide Growing Conditions: Full sun in well-drained soil; drought tolerant once established Zones: 4-10, but usually grown as an annual Buy It: New Day Mix Gazania Seeds ($3, Etsy) Size: To 3 feet tall and wide Growing Conditions: Full sun in well-drained soil; can tolerate drought Buy It: Lavender Grosso ($23, Walmart) Test Garden Tip: Most hydrangea varieties don’t deal well with drought....