"Foliage cover" refers to the amount of leaves and branches that cover an area, often used to describe how much shade or protection the vegetation provides. Full definition
There was an improvement in foliage cover and a slight reduction in dead canopy. (environment.gov.au)
The plant has a single, strong main stem and sturdy branches that provide foliage cover for sunscald protection and support for an excellent fruit set. (fieryfoodscentral.com)
CO2 fertilisation has increased maximum foliage cover across the globe's warm, arid environments. (climatechangereconsidered.org)