The bulk update request #9663 is pending approval.

create implication black_grass (3) -> grass (86008)
create implication blue_grass (34) -> grass (86008)
create implication brown_grass (1) -> grass (86008)
create implication green_grass (307) -> grass (86008)
create implication grey_grass (5) -> grass (86008)
create implication orange_grass (27) -> grass (86008)
create implication pink_grass (18) -> grass (86008)
create implication purple_grass (39) -> grass (86008)
create implication red_grass (22) -> grass (86008)
create implication tan_grass (1) -> grass (86008)
create implication teal_grass (7) -> grass (86008)
create implication white_grass (3) -> grass (86008)
create implication yellow_grass (36) -> grass (86008)

Reason: All colors of grass, whether realistic (blue, green, tan, teal, yellow) or fantastical.