Vinca in containers
I am considering potting Vinca as I did last year. They eventually got unrully and messy looking as summer progressed. I have never given my plants a "haircut" before, but think that's what I need to learn about. Do I just bearly trim of a little at a time when they start to need help? How often can I trim back? And I am assuming from what I've read that they should pop back up quickly. Thank you in advance for your help.