Answer: It is normal for the lowest, oldest leaves to turn yellow on a dumb cane plant. Eventually the stem will be bare. That's why there are usually groupings of these plants in a single container - the lower, younger plants hide the bare stems of the older plants. If all of the leaves are yellowing rather than just the lower leaves, overwatering or lack of nutrients can be the cause. It's important to allow the top of the soil to dry out between watering. You can feed with a half strength dilution of water soluable fertilizer to ensure your plant is getting the nutrients it needs. Good luck with your plant!
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