I have a quarter circle garden in my front yard with one side against my driveway and the other against the sidewalk. It contains white rocks with a little juniper bush in the center. This garden is always full of weeds and I'm not the type to do the work needed to keep it weed free.
Last time I was fed up, I removed the rocks from the garden and then laid down black matting which is supposed to block weeds. On top of that I put mulch and then added white rocks on top. All that work did not prevent weeds.
My thought this time is to remove the rocks and mulch and pour in concrete - maybe 2 inches thick. Then I can put the white rocks on top without the mulch.
I am concerned for the plant in the center. I will want to leave a hole for the plant. My concern is that the plant would be starved if I don't make the hole big enough. Would the plant do fine as long as its root system can dig down under the plant or would I need to give it some breathing room?