Fertilization of house plants should be started after carefully observing their behavior and respecting their rhythms.
Effective organic fertilization involves the precise dosage a plant needs, administered at the right time. In practice, however, the intake of fertilizer is always empirical. We do not know precisely the needs of the plant and the concentration of nutrients stored in the soil. That is why we use some simple rules suggested by specialists.
Experience shows that the best time to fertilize house plants is early April and mid July, and then in September. It seems that a large number of plants have a slower growing process during the hot summer days. In September, the process is revived, and then comes a progressive sleeping in October and a total stop in vegetation, from November to mid-February or early March. This vegetative rhythm is more or less visible, depending on the species, and can be controlled or modified by different techniques (temperature variation, artificial lighting, watering and fertilization).
In general, we can say that fertilization must be more intense at the beginning of the growth period; after that, nutrients are not so vital until the beginning of autumn and then again, they are not so necessary until March. Except for plants that are in full bloom, you do not have to fertilize house plants in the winter. For more on organic fertilizers, check out https://www.revive.com/.