Labor Day 2016. Labor Day is an annual holiday to celebrate the economic and social contributions of workers to the strength, prosperity, and well-being of the country. In the United States, Labor Day is a federal holiday observed on the first Monday of September.
Quick Answer. Cucumber leaves often turn yellow because they are damaged by the potato leafhopper. The small leafhoppers pull sap from cucumber leaves and inject a toxin into the leaves, causing them to turn yellow or brown and appear burned. Continue Reading.
1 Normal aging. 2  As many plants age, the lower leaves will turn yellow and drop off as a normal part of growth. 3  This is especially true of foliage plants like dieffenbachia and dracaena. 4  In this case, don't worry. 5  If the plant becomes too leggy, consider trimming back the main stem to promote new growth and bushiness.ere are the most common reasons for yellowing leaves: 1  Normal aging. 2  As many plants age, the lower leaves will turn yellow and drop off as a normal part of growth. 3  This is especially true of foliage plants like dieffenbachia and dracaena. 4  In this case, don't worry.