There are a few different materials that can be used for grow bags, but not all of them are created equal. Some materials will hold up better than others, and some may even be more harmful to your plants. Here is a rundown of the most common materials used for grow bags, and what their pros and cons are: burlap: often used for coffee sacks, this natural fiber is strong and breathable, making it ideal for grow bags. However, it can be difficult to clean and disinfect, so it's important to take extra care if using burlap bags. plastic: plastic grow bags are inexpensive and widely available, but they're not very durable and can easily tear. They also don't allow for much airflow, which can be detrimental to plant growth. fabric: fabric grow bags are similar to burlap bags, but are usually made from a synthetic material like polyester. They're more durable than burlap, but can still be difficult to clean and disinfect. coir: coir is a natural fiber made from coconut husks, and is one of the best materials for grow bags. It's strong and durable, while also being breathable and absorbent. It's also easy to find coir grow bags that are already pre-made. No matter what material you choose for your grow bag, it's important to make sure that it's clean and free of any harmful chemicals before using it.