Its practice was instituted through Proclamation No. 30 .
Since 1947 , Arbor Day in the Philippines has been institutionalized to be observed throughout the nation by planting trees and ornamental plants and other forms of relevant activities .
Arbor Day 's practice was instituted through Proclamation No. 30 .
Since 1947 , Arbor Day in the Philippines has been institutionalized to be observed throughout the nation by planting trees and ornamental plants and other forms of relevant activities .