Repot the Purple Passion if it sits in standard potting soil. Discard the soil and fill the pot with two parts of peat moss and equal parts of potting soil and sand.
Choose a location in the home where the Purple Passion receives bright, indirect sunlight and the temperature remains between 65 and 70 degrees Fahrenheit. Although the plant survives low-light conditions, the color of its foliage won't be as deep.
Avoid overwatering the Purple Passion plant. Keep an eye on the foliage and water the soil just when it begins to wilt. Cut back on watering in winter so the soil is just barely moist when you stick your finger into it.
Feed the Gynura aurantiaca once a week, beginning in spring when you notice new growth. Use a fertilizer labeled for houseplants. Dilute the rate suggested on the label by half and apply it to wet soil. Discontinue feeding the plant in November.
Snip off flowers as they appear in the spring. Cut off 1/2-inch from the tips of new branches. This encourages the Purple Passion to produce new growth, making the plant appear bushier.
Rejuvenate the Purple Passion plant by cutting it back hard in the winter. Allow 4 nodes per stem to remain. The plant will grow back healthier, fuller and more colorful.