How often should you fertilize houseplants? This applies in winter and in summer. Liquid fertilizer is added to the irrigation water and is a little easier to use than fertilizer sticks.
Coffee can also be used as fertilizer. However, keep in mind that it lowers the acidity of the soil. If the soil is too dry or the plant is wilting, you should generally not fertilize as this could damage the roots. You can find even more exciting garden topics in the regular newsletter from our partner 24garten.