Do wallflowers grow back in the spring from the original plant (do you cut it back or do they just reseed themselves)?
Certified GKH Gardening Expert
Here is more information on growing wallflower plants: https://www.gardeningknowhow.com/ornamental/flowers/wallflower/growing-wallflower-plants.htm
The Wallflower is an old-fashioned garden flower which, although a perennial is usually grown as an annual or biennial because it tends to 'bloom itself to death'.
This 12"-24" plant produces a profusion of fragrant, brightly colored flowers all spring making it an excellent choice for your butterfly garden, flower bed, or garden border.