Should I water my Monstera when a leaf turns yellow?
Not automatically. Check the deeper root zone and drainage first, because yellowing can occur with excess moisture as well as other stresses.
Can I move a yellowing Monstera into direct sun?
Avoid an abrupt move into intense direct sun. Compare the current position with the profile's bright-indirect light guidance and make any adjustment gradually.
Should I fertilise a Monstera with yellow leaves?
Do not use fertiliser as a first response. First check moisture, drainage, light, and visible pest evidence.