Texas FFA Nursery Landscape Practice Exam

How can some salt buildup in potted plants be removed?

1. Withholding water

2. Adding lime to the irrigation water

3. Leaching

4. Adding fertilizer

The correct answer is: Leaching

Leaching is the correct method for removing salt buildup in potted plants. This process involves applying excess water to the soil so that it drains out of the bottom of the pot. As the water flows through the soil, it carries dissolved salts with it, effectively flushing them away and reducing their concentration. This is particularly important in container gardening, where salts can accumulate due to evaporation and the use of fertilizers. Withholding water would actually concentrate salts further, leading to potential harm to the plant. Adding lime to the irrigation water can alter pH levels but does not directly address salt buildup. Adding fertilizer can exacerbate the problem by introducing more salts into the soil. Hence, leaching is the most effective approach to manage and reduce salt accumulation, ensuring a healthier environment for potted plants.