For geraniums to bloom all year round, you can follow two simple tricks. For the first thing, you will need the iodine tincture , just the one that heals wounds, along with a bottle of clean water. Add a drop of tincture of iodine for each liter of water. The bottle will be shaken. Iodine helps prevent plant diseases. With the mixture obtained, you can proceed to regularly water the plant, with 50/100 ml each time, along the part of the ground that borders the pot. Be careful not to overdo it with iodine as you could damage the root of the plant which would burn. Water and iodine can be given for a month, to be repeated periodically.
Another trick is to use an aspirin tablet. On the tablet, using a spray bottle, spray some water to dissolve it. The dissolved aspirin should be placed in a liter of water. The contents must be shaken well so that the medicine dissolves. The salicylic acid contained in aspirin will allow plants to proliferate because it strengthens the roots. You can spray water and aspirin on the geraniums for a week.
Aspirin also helps prevent the appearance of fungi that are dangerous to the health of the plant. A true health infusion not only for geraniums but also for other non-flowering plants. Seeing is believing.