A student did a science fair project: watering parsley and sweet marjoram with coffee vs. water. Parsley with coffee grew very tall; nothing else grew. They asked what in coffee made parsley grow tall (nutrients, vitamins).
The coffee bean is a seed containing every nutrient a plant needs (14-17 elements). Brewed coffee contains many of these elements, accounting for increased parsley growth. The expert didn't know why marjoram didn't respond.
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