Carolina geranium (Geranium carolinianum) is a branching winter annual or biennial with long hairy stems that range from green to red in color. Leaves are hairy on both surfaces with various divided sections and bluntly toothed margins
From above, you can already gather that the plant does not need fertilizer to grow or spread. In fact, rich, fertile soil with nutrients will deter it from growing.
This includes both germination and growing. It does best when conditions stay between 65 and 80 degrees Fahrenheit.
The plant has erect stems covered in spiky hairs. The color of the stem is typically pink to red. There are two leaves per node on each stem, called opposite leaves. The stem is not succulent and not nutrient-rich as a source of calories for herbivores.