Ensuring a healthy, productive container garden would require constant and regular checking from time to time. This is so you can immediately spot plant problems as soon as possible and avoid further headaches. On days when you start to notice your plant looking quite sickly, it’s probably because of either fungal or abiotic diseases.
To know how to deal with them, read the full article here: https://www.dummies.com/home-garden/gardening/container-gardening/common-plant-diseases-in-container-gardens/