4-5 feet tall x 4-5 feet wide. Helianthus maximiliana 'Undaunted® Lemon Max' (Perennial Sunflower) is a sensational bloomer with an explosion of huge, clear yellow daisies in August. A big strapping plant to about 5 ft. in height and of equal girth, give ‘Lemon Max’ plenty of room to grow; it's especially well-suited to meadows and habitat gardens. While at home in any soil type, the plant loves clay. Birds will relish the seeds and the native bees are especially fond of these nectar-rich sunflowers. A garden hybrid discovered by Lauren Springer Ogden in her Fort Collins garden. (Cutting propagated.)