My brother has an acreage near Ottawa, Ontario, Canada. It was a horse pasture in the recent past, but now is just sitting, growing whatever grows. Grass and wild flowers and weeds and such.
There are a number of elderberry bushes growing. I think they have grown from birds pooping out seeds from some plant on somebody's nearby farm. Right now most of them are just single stems, usually about 1 meter tall or less. They may get one tiny little clump of berries.
I want to collect them into a grove in one location. What advice is there on transplanting elderberries?