Locate a place in your garden that offers partial shade to full sun and has several square feet of room for this plant to expand.
Amend the soil in this area with compost if it isn’t already rich.
Sow your Toothache Plant seeds directly on the ground. Alternately, plant your Toothache Plants into this area about 18 inches apart.
Water the area regularly until your Toothache Plants sprout. After that, water often enough to keep the soil damp but not drenched.
When your young Toothache Plants have several full sets of mature leaves, pinch back the stems. This will cause the plants to be bushy and compact instead of sprawling and lanky.