Rubber Plant brown edges

Edges closest to hot glass or a cold draft may brown first. Several leaves browning after repeated drying call for checking moisture throughout the root ball.

Correct the condition that is still present

Water a dry root ball slowly until its center is moist, then drain. Empty runoff if the pot is already wet. Move affected leaves away from damaging heat or cold while preserving bright light.

If browning accompanies wilt or ongoing yellowing in wet mix, inspect roots. Keep firm, partly green leaves; the next new leaf is more useful evidence than an old margin, which stays brown.