1. What is Mayseeds Tape? At first glance, Mayseeds tape looks like a roll of faintly textured masking tape. But unroll it, and you’ll find tiny, perfectly spaced seeds embedded between two thin layers of biodegradable paper. Unlike traditional seed mats (which are large and pre-cut), Mayseeds tape is narrow (typically 1–2 inches wide) and designed to be cut, folded, or torn by hand.