What kind of pesticide can I use on my hedge, there are small bugs and spider webs and there are dead patches on the hedge now.
It's possible you have a few issues going on. Fire Blight disease is a common issue with Cotoneaster.
Pests can be treated with Neem Oil.
https://www.gardeningknowhow.com/plant-problems/disease/fire-blight-remedies-and-symptoms.htm
https://www.gardeningknowhow.com/plant-problems/pests/pesticides/neem-oil-uses.htm
Our landscaper here in NW IL did a very aggressive pruning on the Cotoneasters in our community on a July 94 degree day. The plants into the fall were very sorry looking. They said wait til spring they will be fine. Well it's spring and most of them are dry and dead looking. Can you shed some light on this please
We recommend pruning early in spring, though pruning of dead or diseased branches can be done anytime.
This link has more information.
https://www.gardeningknowhow.com/ornamental/shrubs/cotoneaster/pruning-cotoneaster-shrubs.htm
Hello, I have about dozen cotoneaster bushes that are out of control. Is there any way to slow their growth without killing them?
This article will help you.
https://www.gardeningknowhow.com/ornamental/shrubs/cotoneaster/pruning-cotoneaster-shrubs.htm
My second year with dying Cotoneasters (cranberry). In Zone 6 (Kansas City). Southern exposure with full afternoon sun. pH~5. Adequate water (soil measures mid-scale on two testers). 1+ inch cedar mulch. Planted near butterfly bushes. They keep turning brown and dying out. 3 of 6 (garden center planted) died in year 1. One of the replacements has died this summer, 3 others heading that way now. What can I try to save them? Or, failing that, replace them with?
Since you have multiple fails with this plant, I would start with a soil test.
Also you should check soil moisture levels and drainage.
These links will help you.
https://www.gardeningknowhow.com/garden-how-to/soil-fertilizers/testing-soil.htm
https://www.gardeningknowhow.com/garden-how-to/soil-fertilizers/making-sure-soil-drains-well.htm
https://www.gardeningknowhow.com/ornamental/shrubs/cotoneaster/growing-cranberry-cotoneaster.htm
MY COTONEASTER IS COVERED IN A SILKY WEB
Sure, we have two articles that will help you: https://www.gardeningknowhow.com/plant-problems/pests/insects/tent-worms-control.htm
https://www.gardeningknowhow.com/plant-problems/pests/insects/controlling-fall-webworms.htm
I have 3 dogs that have free access to the yard and I'm wondering if they eat, chew, or swallow the berries, will it be of harm to them.
Yes, these are toxic to all species. Remove them if possible and discard. They can cause vomiting and diarrhea.
This article will give you more information on the species: https://www.gardeningknowhow.com/ornamental/shrubs/cotoneaster/how-to-grow-cotoneaster.htm
https://ucanr.edu/sites/poisonous_safe_plants/Toxic_Plants_by_common_Name_659/
I live in Hampshire England.
Cotonester doesn't usually require much fertilization, but since yours isn't blooming, try a light dose of fertilizer.
Also, check to make sure it isn't rootbound and in need of repotting.
Cotoneaster needs at least part shade to thrive. Is your cotoneaster getting enough sun?
Another thing you can do is have your soil tested. Perhaps important nutrients are lacking.
Here is more information about cotoneaster:
https://www.gardeningknowhow.com/ornamental/shrubs/cotoneaster/how-to-grow-cotoneaster.htm