When my mums are growing, aren’t I supposed to be doing something to them like cutting them back?
Why, yes, yes you are! Pinching your mums between the time they’re 6-8 inches tall, until around July 15th or so (usually 2-3 pinches is all that’s needed), you’ll keep those garden mums more compact, fuller, and have a lot more flowers in the fall. As a matter of fact, some early blooming varieties will start flowering soon if they’re not pinched back to delay the flowering process!