Nephthytis (Syngonium)The arrowhead plant is a fast growing, pretty, trailing or climbing vine. The simple arrow shaped leaves vary in hue depending on their age, ranging from dark green and white to lime green and bright pink. Arrowhead vine grows best as a houseplant in bright, indirect light, well draining potting soil, and warm, humid conditions. The vine is toxic to cats, dogs, and horses. Wear gloves to prevent the Nephthytis sap from irritating your skin. Plant