Alternanthera is a perennial plant that can be grown in most climates and doesn’t require too much maintenance. It is important to overwinter the plants before they start to go dormant in the fall. The process of overwintering includes making sure that they are not frozen, not too hot, and have enough water. If you follow these steps, your plants should survive well over the winter months. Plants are a great way to add life and color to your home, but it can be difficult to keep them alive over the winter months. Luckily, with these few simple steps, you can easily keep your plants alive and thriving all year round. - Be sure that you water your plants at least once a week. - Keep them away from drafts or heaters. - Put them in indirect sunlight rather than full sun. - Add mulch around their base to help retain moisture and prevent weeds from growing near the plant's roots. In order to overwinter alternanthera, you should use a container that will not allow the plant to get too cold. You should also use a peat-based potting mix and keep it in a cool room.