We have a lot of Vinca. I noticed the shriveled leaves last year and didn’t know why. It’s spread more this year, I now know it’s rust. I was hoping for any advice. We sprayed it with sulfur, didn’t do much that could see. Everything is still green… not dead…just shriveled leaves. We are working on mulching under and through the Vinca. Should I trim it at the end of the season? I need to choose between three fungicides off the internet, any tips on which one? (pageant,phyton,or Terragaurd) …Do I spray fungicide now and the beginning of next season?