Chapter - Greenhouse backdrops, ground and walkway only
The petter-pots are a plural-named petter-backdrop. The petter-pots are in MGR3 and MGR3a. The printed name of the petter-pots is "pots". Understand "pots/pot/soil/plants" as the petter-pots. The description of petter-pots is "There are several large plant pots visible beneath the roots, though many of them are broken beyond recognition. Inside there is dry soil and the remains of dead exotic plants."
The petter-walkway is a petter-backdrop. The petter-walkway is in MGR3 and MGR3a, and MGR3b. The printed name of the petter-walkway is "mesh walkway". Understand "walkway/mesh/platform" as the petter-walkway. The description of the petter-walkway is "The root-covered walkway circles the greenhouse, but looks broken and bent in several places[if the location is MGR3]. A staircase leads up to it from here[end if][if the location is MGR3a]. Tree branches have grown into the metal mesh, almost forming a natural bridge to the trunk of the tree[end if]."
Does the player mean doing something to the petter-walkway:
it is very likely.
The petter-sculptures are plural-named scenery in MGR3a. The printed name of the petter-sculptures is "sculptures". Understand "sculptures/ornaments" as the petter-sculptures. The description of the petter-sculptures is "Scattered across the walkway are broken pieces of garden ornaments, strangled by the roots."
Instead of taking the petter-sculptures:
say "You don't need any broken garden ornaments."
The petter-rubble is a petter-backdrop. The petter-rubble is in MGR3 and MGR3a. The printed name of the petter-rubble is "rubble". Understand "rubble/remains/twisted/metal/weeds" as the petter-rubble. The description of petter-rubble is "Under the roots there are bits and pieces of broken pots, soil, dry leaves and dead plants[if the location is MGR3a], twisted cast-iron remains of the walkway and railing[end if] interspersed with still growing weeds."
Instead of petter-digging the petter-rubble:
try searching the petter-rubble.