Hello,

It sounds like your rose bush might indeed be dealing with spider mites. Spider mites are tiny pests that can cause the symptoms you describe, such as webbing, red leaves, and brittle edges1.

Here are some steps you can take to address the issue and prepare your rose bush for winter:

Fall Care:

Prune Infested Parts: Remove any heavily infested branches and dispose of them from your garden to prevent re-infestation. Prune back the plant by about one-third, making cuts at a 45-degree angle to prevent water pooling.

Increase Humidity: Spider mites thrive in dry conditions, so increasing humidity around your rose bush can help deter them. You can do this by watering the base of the plant regularly.

Use Miticides: Apply a miticide specifically designed to target spider mites. Follow the instructions carefully and reapply as needed (usually every 10-14 days).

Beneficial Insects: Introduce beneficial insects like ladybugs or predatory mites that naturally prey on spider mites.

Winter Preparation:

Mulch: Apply a layer of mulch around the base of the plant to protect the roots from freezing temperatures.

Protect the Base: Wrap the plant base with burlap or similar material to provide extra insulation.

Avoid Heavy Pruning: Heavy pruning in the fall can stimulate new growth that is vulnerable to winter damage. Instead, do a light trim to remove any dead or diseased wood.

Spring Care:

Inspect and Prune: In early spring, inspect your rose bush for any remaining signs of spider mites and prune accordingly.

Fertilize: Apply a balanced fertilizer to promote healthy growth.

Continue Monitoring: Keep an eye on your rose bush for any signs of pests and address them promptly.

I hope these steps help your rose bush recover and thrive!