My plants are established, but over the last two weeks, they have gone from full of life and vibrant to dropping, flowers falling off and turning brown! I have also noticed little spots on the Salvia’s leaves. Is it a fungus? And how do you get rid of it? Thank you!
This does sound like a fungus issue, though pests can also cause leaf marks.
Excessively damp conditions or watering from above could be cause of leaf damage.
Here are some links with more information.
Neem Oil can be used to treat most sucking insects and also works as a fungicide. Neem Oil is organic and safe for people, pets and bees.
Here is a link with more information.