I have moved house and gained an old, bare in places Cotoneaster simonsii hedge, about 10 feet tall. Can I improve the density and look of the hedge or will I have to dig it up?
You can improve it by using rejuvination techniques. With this bush, rejuvenation takes about 2-3 years. Each year, remove 1/3 of the plant, taking the largest branches first and moving down in size until 1/3 of the plant has been removed. This forces the plant to grow new, more full branches. Repeat this process every spring until the plant has filled in as much as you like. This process normally take 2-3 years to get the plant to really fill in.
Any idea on how to control couch grass that is growing in my cotoneaster ground covering plant?
Unfortunately, you're better off hand pulling this weed.
Is there a plant named cottoneaster that is not related to cotoneaster?
As far as I know, cottoneaster is an alternative spelling for cotoneaster.
I have a very large cotoneaster plant that was first planted by my builder in 1994. Since then it has been growing and spreading at an alarming rate. My efforts to control it only seem to result in growing an even larger plant. I want to get rid of it before it takes over my entire front yard. How do I accomplish this quickly and hopefully painlessly, but without killing all my other plants? Your help is urgently needed because this plant has got to go ASAP!!
I personally would take it apart with a sawzall or reciprocal type saw. These power saws typically have disposable blades and can remove the branches above the ground, then can be plunged into the soil to cut through roots as well and get the main trunk out. It is the fastest, easiest way I have found to remove shrubs.
I need help! I work on a golf course and we planted loads of cotoneaster in an area around trees. Sadly the area has overgrown with grass and I was wondering if you knew of any herbicides we could use that would kill the grass and not the cotoneaster? It will take a lifetime to hand weed.
There are a few grass specific weed killers out there that you should be able to use. You may need to go to a nursery to find the best selection of them. One that pops into my head is Grass-B-Gon by Ortho. It kills grass but not landscaping plants.
I have Cotoneaster dammeri on a very high, steep hill that is being overcome with weeds. Is there anything I can treat them with to kill weeds? It's impossible to do it manually.
What weed(s) are you afflicted with? Different types of weeds have different eradication strategies - you can search http://www.gardeningknowhow.com for specific weed removal options.
Weeds can be removed chemically (https://www.gardeningknowhow.com/plant-problems/weeds/conventional-weed-killers.htm) or organically (https://www.gardeningknowhow.com/special/organic/homemade-pet-friendly-weed-killer.htm)
You can also consider a different type of ground cover that is more resilient to weeds such as english ivy or periwinkle:
Two days ago I bought this plant. Its leaves and branches are hard. I don't know its name and how to take care of it. I need your kind suggestions. Thanking you. Shahin.
It looks to be a variety of Cotoneaster.