including other species of geranium. To protect the citronella and the other plants in your garden, you can also include a few plots of nasturtium (Tropaeolum majus). These bright, edible flowers ...

Plant citronella in slightly acidic, sandy, or chalky loam with a pH level of 5.8 to 6.3. This soil is where it will grow best, but the plant will adapt to any soil type as long as it drains well.