Horticulture expert David Denyer reveals an effective method to enhance the growth of peace lilies using a simple hack involving banana peels. By soaking the peels in water for several days, one can create a potassium-rich fertilizer. Draining the water and diluting it with fresh water provides the plant with essential nutrients, encouraging lush growth. However, Denyer emphasizes the importance of following the correct process to avoid attracting pests and insects. Regular maintenance, including watering, providing indirect sunlight, and deadheading, is crucial to keep peace lilies healthy. This cost-effective hack, combined with proper care, can prolong the plant’s life for decades.