May 
| May |
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May
| Susceptible Plant | Disease or Insect | Recommended Treatment |
| Roses | Rust, blackspot, powdery mildew |
Microcop, Fertilome Systemic Fungicide, Daconil, or Green Light Rose Defense as per label direction |
| Laurel | Shot hole | Microcop, Fertilome Systemic Fungicide, or Daconil. |
| Peony, Lily, Ajuga |
Botrytis | Microcop, Daconil,or Fertilome Systemic fungicide. |
| Rhododendrons, Viburnum Heather |
Root weevil | Orthene at 3 to 4 week intervals 3 times. Nematodes in fall to control larvae. |
| Azaleas at bloom time |
Leaf gall | Remove all galls. Microcop, Daconil |
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Twig Blight (Phomopsis) | Prune out infected twigs and branches. Dip pruning shears in 10% bleach water between each cut. Spray with Halt Do not fertilize. |