Overwatering

What's happening

Majesty palm wants consistently moist soil but never soggy soil. When the mix stays waterlogged, the roots can't take up oxygen, so they begin to suffocate and rot and stop feeding the plant. The palm responds by yellowing its oldest, lowest fronds first, which fade to a soft uniform yellow before they brown.

How to fix it

Let the soil dry down a bit before watering again, and make sure the pot actually drains — empty any saucer so the roots never stand in water. Slip the palm out and check the roots: firm ones are pale, so trim any brown, mushy roots with clean scissors and repot into fresh, fast-draining mix. From now on, water when the top inch is dry rather than on a fixed schedule, aiming for evenly moist but never wet.

This is general guidance based on common symptoms; individual plants vary.