Your neighbour may be having difficulty coping with the garden and would appreciate some support, maybe from yourself or perhaps from local charities or volunteer groups.
Efallai bod eich cymydog yn cael trafferth ymdopi â'r ardd a byddai'n gwerthfawrogi rhywfaint o gymorth, efallai gennych chi neu efallai gan elusennau lleol neu grwpiau gwirfoddol.