It is generally not necessary to put something under grow bags, as they are designed to be used on their own as a container for growing plants. However, there are a few situations in which it may be beneficial to put something under grow bags:
- To protect surfaces: If you are using grow bags on a surface that you want to protect, such as a deck or patio, you may want to put something under the grow bags to create a barrier between the bags and the surface. This could include a tarp, a piece of plastic, or a layer of mulch.
- To improve drainage: If you are growing plants in a grow bag that does not have good drainage, you may want to put something under the bag to help improve drainage. For example, you could place the bag on top of a layer of gravel or pebbles, which can help to increase the amount of air circulation around the roots of the plants and improve drainage.
- To prevent weeds: If you are using grow bags in an area where weeds are a problem, you may want to put something under the bags to help prevent weeds from growing up through the bottom of the bags. This could include a layer of weed fabric or a layer of mulch.
Overall, whether or not you need to put something under grow bags will depend on the specific needs of your plants and the conditions in which you are growing them.
