Ramie is planted and Harvested by Farmers and used in making cloth.
Ramie is one of the cheeper seeds you can buy. They do not sell for very much, but it is very useful to tailors. 2 Ramie and 2 silk are needed to make a Middle Item bag (which gives you 8 more backpack slots for 720 hours)
Harvesting gives you 3 Ramie which you can sell for 6 wen.
Ramie grows into a huge plant that is hard to miss.