Red Seal Landscape Horticulturist Practice Exam

Why is light exposure significant when selecting plants for landscape design?

1. Different plants have similar light requirements

2. Some plants thrive in complete darkness

3. Different plants have varying light requirements that must match site conditions

4. Light exposure does not affect plant health

The correct answer is: Different plants have varying light requirements that must match site conditions

Light exposure is a critical factor in landscape design because plants have diverse light requirements that must align with the conditions of their planting site. Each plant species has its own specific needs regarding sunlight, which can influence its growth, flowering, and overall health. For instance, some plants thrive in full sun, requiring several hours of direct sunlight each day to photosynthesize effectively, while others may flourish in partial shade or full shade. If the light conditions of the chosen site do not correspond with the needs of the plants being used, it can lead to poor growth, stress, and even plant failure. Understanding the light exposure of the landscape and the requirements of each plant is essential for creating a successful and sustainable design that enhances the aesthetic appeal while ensuring the health and longevity of the plants. This is why the choice that emphasizes the need for matching light requirements with site conditions is the most relevant and accurate in the context of landscape horticulture.