The soil in the pot looks pretty dry; taro likes damp soil that should never be allowed to dry out. And the pot looks a bit small for this plant.
It's interesting to read advice on some pages saying to give it dappled or partial shade, when the growing conditions I've seen have been huge fields with nothing around them to provide shade. So the north window might not be its happy place. I also see that they are supposed to lose their leaves inside if the temperature gets below 21 C degrees. If you keep your indoor temperature at 20 C degrees or lower during the winter, which my friends shame me into trying to do, that could be an issue too.
Hi, From the images, it appears that your Colocasia is showing signs of stress, most likely due to one or a combination of the following factors: Lighting: A north-facing window might not provide enough light for Colocasia, which typically thrives in bright, indirect light. Insufficient light can cause yellowing and unhealthy leaves. Consider supplementing with a grow light or moving it to a spot with more indirect sunlight. Watering: Colocasia prefers consistently moist soil. If the plant is either overwatered or underwatered, it can result in yellowing and browning leaves. Check to see if the soil is too dry or overly wet. Ensure the pot has proper drainage to avoid root rot. Humidity: These plants also love high humidity, and indoor environments, especially near a north-facing window, can sometimes have lower humidity levels. Misting the plant or using a humidity tray might help. Nutrient Deficiency: Yellowing, especially between the veins, can indicate a nutrient deficiency, often nitrogen or magnesium. If you haven’t fertilized recently, consider using a balanced, water-soluble fertilizer to support healthy growth. To improve the plant's health: Adjust lighting conditions if possible. Ensure a regular watering routine without allowing the soil to dry out completely. Check for proper drainage and root health. Increase humidity around the plant if it's in a dry indoor environment. Consider fertilizing it with a diluted houseplant fertilizer. Addressing these factors should help your Colocasia recover and produce healthier leaves. Thanks!
