Monstera brown spots

Dry tan patches on exposed leaves often follow a move into stronger sun. A brown crease may be damage from handling. Photograph a spot so you can tell whether it is still enlarging.

Check tender growth without opening it

Look over already-open leaves, their undersides, and the outside of the newest leaf sheath for silver scars and black specks. These can accompany thrips. Let rolled leaves open on their own; pulling them apart can create the very scars you are investigating.

When spots keep appearing

Move sun-damaged foliage out of intense exposure. For expanding wet-looking lesions, separate the plant and keep leaves dry. If spotting also comes with droop or yellowing, check moisture in the root ball and empty the outer pot. Soft, collapsing roots need root rot treatment; leaf spots alone do not establish root rot.