No person shall place or maintain on any planting strip or lawn extensions in any public way or place of the City, any stone, brick, sand, concrete or other material or article, which may injure or which may in any way impede the full and free passage of water, air or fertilizer to the roots of any tree, shrub, vine, or plant, without leaving an open space of ground not less than four feet in diameter around the same.
('88 Code, Title III, Ch. 32, § 3.30) Penalty, see § 93.99