Certified Professional Horticulturist (CPH) Practice Exam

Which practice can help enhance the growth of plants in a landscape?

1. Constantly changing soil types

2. Providing adequate sunlight and water

3. Over-fertilizing

4. Planting in shaded areas

The correct answer is: Providing adequate sunlight and water

Providing adequate sunlight and water is essential for enhancing the growth of plants in any landscape. Plants rely on sunlight for photosynthesis, the process by which they convert light energy into chemical energy to fuel their growth. Without sufficient light, plants become weak and leggy, as they stretch toward the light source, ultimately leading to stunted growth. Water is equally important because it helps dissolve nutrients in the soil, making them accessible to roots. It also plays a crucial role in various physiological processes, such as nutrient transport, turgor maintenance, and temperature regulation. When plants receive the right balance of sunlight and water, they are more likely to thrive, develop strong roots, and produce foliage and flowers. In contrast, inconsistent soil types can disrupt plant health by affecting drainage and nutrient availability, while over-fertilizing can lead to nutrient toxicity, which can harm plant growth. Planting in shaded areas can limit the amount of sunlight a plant receives, leading to poor growth and overall health. Thus, ensuring that plants have adequate sunlight and water is fundamental to fostering a productive and vibrant landscape.