A common issue is ZZ plants turning yellow, often caused by overwatering. 'Check if the soil is too wet and adjust your watering schedule accordingly,' says houseplant expert Kayla Gajdascz. Brown spots or drooping leaves can also be a sign of overwatering or poor drainage, she adds. 'Ensure the pot allows excess water to escape and that the plant isn't sitting in water.' Although these plants will tolerate lower light conditions, too little light can result in leggy growth. 'Move the plant to a brighter location with indirect light or supplement with artificial light, so that new growth grows tall and straight,' recommends houseplant expert Vladan Nikolic. In terms of houseplant pests, Kayla says that ZZ plants are relatively resistant. However, they can occasionally be affected by aphids, mealybugs, or spider mites, she warns. 'Regularly inspect your plant and treat pests with insecticidal soap or neem oil if necessary.'