Prunus padus can be used as a hedge or a small specimen tree 30 to 40 feet high.Itdepends why you want to plant it.
You should plant it 15 inches apart.
You should plant them arond 3-4m apart
You should plant them 3 inches apart.
20ft apart
because it does
plant them 12 to 15 inches wide. Keep rows 3 to 4 feet apart.
10 cm
200 meters
two inches apart
3 feet
6x4 meters
10 or 12 inchs