Natural leaf aging

What's happening

These plants are slow growers that hold their leaves for years, but every blade eventually ages out. The plant retires its oldest, lowest leaves to put energy into new shoots pushing up from the base. If only one or two of the lowest leaves are yellowing and the rest looks deep green, nothing is wrong.

How to fix it

Cut the spent leaf off right at the base of its stalk with clean scissors if you prefer the tidier look, and carry on with your normal care. Just keep an eye out that the yellowing stays limited to the oldest leaves and doesn't start spreading to healthy upper growth.

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