What You Will Get. You will receive copper coin plants growing in a 2.5". Pot will not be included for shipping safety. Some leaves may turn yellow during transit. That is fine. Those yellow leaves may be removed. New leaves will come out shortly. Description. Copper coin plant (Hydrocotyle vulgaris) is an attractive plant wonder that can be grown indoors and outdoors. The plants grow in water making the maintenance easy and clean. Their round leaves resemble the ancient copper coins and symbolizing wealth and good fortune. Their dark green foliage with upright stems looks fresh and eye-catching. Care Tips. Copper coin plants can be grown in water, in soil submerged with water or in water-saturated soil. The plants love sunlight and should be given as much sunlight as you can. Feed the plants with diluted water-soluble fertilizer to promote the plant growth and to fill the container rapidly. Copper coin plants are very cold hardy and tolerate temperature at or near the freezing point. Its roots can survive 20°F (-6.7°C) although the leaves and stems may be damaged and die at such a temperature.