Fontinalis Antipyretica (NATIVE Oxygenating Plant) Willow Moss iFontinalis antipyretica is a useful oxygenating aquatic that also provides superb cover for fish and other pond life. The long evergreen stems of Water Moss grow fully submerged up to a depth of 1m (39″) making this a valuable oxygenator for most garden ponds. The evergreen stems will grow all year round, helping to improve the aquatic environment even throughout the winter months. Posting: Monday-Thursday Except Bank Holidays All Plants are posted FIRST CLASS Plants are packed to last 7 days. Supplier of plants: oxygenators, reeds, iris, water lilies, bog gardens, wildlife ponds, natural ponds, lakes, floating plants, deep water plants, marginals, native british and tropical.