How To Preserve Flowers - Version 1.0 Preserving flowers or drying flowers is definitely an enjoyable experience which happens to be simple to do. Hanging and pressing, with glycerin, or using several different drying treatments which include sand, homemade blends, or silica gel are all do it yourself flower preserving processes. While all of these flower preserving processes can produce a beautiful product, the recommended process is to freeze dry flowers professionally for longevity, color and shape.