To plant water chestnuts at home, you’ll need a warm climate or a container setup since they grow best in wet, marsh-like conditions. Start with fresh water chestnut corms and plant them in a large tub or pot filled with muddy soil and about 5–10 cm of standing water. Place them in a sunny spot, as they need plenty of light and warm temperatures to grow well. As the plants develop, keep the water level consistent and allow them to grow for about 7–9 months. Once the tops turn yellow and die back, you can harvest the corms by draining the container and digging them out.