Hoya Krohniana Black Leaf A new sought after variety of Hoya, black leaf does exactly what it says on the tin and produces super dark small pointed leaves. A real standout to your collection! How to care for your Hoya – Water: Less is more when it comes to watering; we like to wait until the leaves pucker slightly. Light: This Hoya grows best in very bright light. Southern exposure is best, but it can adapt to east or west locations in front of a window. Humidity: They like high humidity and would be perfect for a bathroom or kitchen. Temperature: Average room temperature is fine. Other info – Toxic to cats & dogs? No Air purifying? Yes