espacement
noun
es·pace·ment
ə̇ˈspāsmənt,
eˈ-
plural -s
Africa
: the distance between a series of things that have been or are to be spaced (as in planting)
when should sunflower seeds be planted and what espacement is usual 
Farmer's Weekly (South Africa)
Farmer's Weekly (South Africa)
Word History
Etymology
French, from espacer to space (from Middle French, from espace space) + -ment