How many hedge plants?
Plants per row = length ÷ spacing + 1
A 30 ft privet hedge at 18 in (1.5 ft): 30 ÷ 1.5 + 1 = 21 plants in a single row. A staggered double row needs about 41.
A double row is planted about 12 to 16 in (30 to 40 cm) apart with the plants offset, like a zigzag. It makes a dense hedge faster and is common for beech, hornbeam and other bare root plants.
Planning the rest of the job? Use the Tree spacing calculator and the Plant spacing calculator too.
What are typical hedge spacings?
Boxwood, low formal edging
12 in (30 cm)
Beech or hornbeam, double row
16 in (40 cm)
Privet
18 in (45 cm)
Cherry laurel
30 in (75 cm)
Arborvitae, tall screen
3 ft (90 cm)