How Tall Are Rudbeckia. Topping out between three and twelve feet cut leaf coneflower has divided leaves and four-inch wide flowers that have green cone. Perennials are any plant living for at least three years.
Topping out between three and twelve feet cut leaf coneflower has divided leaves and four-inch wide flowers that have green cone. Growing to a height of 50cm its perfect for the front of a border or a container Rudbeckia Aries magnificent bright yellow flowers with a large dark central zone. Black-eyed Susans generally grow between 1 and 3 feet tall though they can grow taller and can spread between 12 to 18 inches so plant seeds closer to prevent lots of spreading or plant further apart to make a nice border.
Rudbeckia fulgida has star-like flowers with dark centre.
TALL up to ten feet. Wide 7-10 cm in mid spring to late summer. TALL up to ten feet. 01072021 The Rudbeckia plant genus consists of hardy perennials that range from 30 cm to 18 m in height.