Jute, that famous natural vegetable fiber, can be easily spun into coarse, strong threads. We've made a few up for you. None block light, air or water. As a natural material it will all eventually biodegrade.
Leaf and garden refuse collection bags. These are large, wide-mouth bags. 3 bags per order.
Trellis netting. These are a very loose burlap weave (6 x 12 ft) for draping over stakes or frames. 3 nets with each order.
Single thickness ground cover sheets (3 x 24 ft in size). Excel as general surface protection and erosion control. 2 rolls with each order.
"Potato Sacks". Basically, the iconic size (20 x 27") used to store (and move) bulk produce. Exceedingly strong and sturdy. 3 per order.
Jute twine. 4 rolls (155 ft each) per order.