from employee blog
If the watering bag cannot be placed normally around the tree for whatever reason, e.g. branches close to the ground or other vegetation, the bag can also be placed next to the tree to be watered.
The tree bag is already very stable by itself and only needs a small amount of support, e.g. from a wooden rod or a metal rod.
Note: Be careful not to damage larger roots when inserting the support into the ground.