However, if a Pelargonium is taken indoors for the winter or grown in the tropics, it will continue to bloom for years. Pelargoniums are clearly perennials. See tender perennial . Hedges, topiaries, and trees are perennials that do not die back, although the deciduous ones do go dormant. Phosphorous promotes strong roots and stems.
Bone meal is a good source of phosphorus.
To remove the growing tip of a stem. Potassium promotes healthy fruit . Seaweed and greensand are common sources of potassium. I am still confused, however on the merits of soluble vs. insoluble potash. R. phaseoli specializes in peas and beans and is available in garden centers.