Has it been raining non-stop for ages and are your balcony plants getting "wet feet"? They don’t like this at all. Come to their rescue quickly by simply drilling a hole in the bottom of their containers.
For just this reason, our containers have extra punch points. In no time at all, you've made a water overflow and the plants will feel comfortable, even in the rain.
If you don’t have EMSA window boxes, take care with the drill to make sure that container doesn't crack.