Brown leaves could mean several things. Best guess is that it is getting too much water. Even though it likes moist soil, make sure that the soil is not waterlogged. Test the soil: if it feels dry, or almost dry, then water. If it is moist or soggy, do not water; cut back on the watering schedule a bit and remove the brown leaves. Make sure there is a drainage hole in the bottom of the pot. Other causes could be viruses or fungal diseases, or pests, overcrowded roots, etc.
Brown leaves could mean several things. Best guess is that it is getting too much water. Even though it likes moist soil, make sure that the soil is not waterlogged. Test the soil: if it feels dry, or almost dry, then water. If it is moist or soggy, do not water; cut back on the watering schedule a bit and remove the brown leaves. Make sure there is a drainage hole in the bottom of the pot. Other causes could be viruses or fungal diseases, or pests, overcrowded roots, etc.