Have you ever done a science experiment where you test which factors have positive effects on the growth of a plant? You use soda, water, milk and nothing to test which helps a plant grow best… But what about coffee?
There have been studies on the effect that coffee grounds have on the growth of a plant. A man names James Wong decided to run an experiment where he sprinkled coffee grounds on one of two identical vegetable beds in order to see if there was a difference between the two plants.
Unfortunately, the results were not good. Crop yields fell in about two weeks, the leaves turned yellow and most seedlings didn’t germinate in the bed with the coffee grounds.
So, what’s the problem? Wong seems to think the problem is caffeine itself. It turns out, coffee suppresses germination of other plants and seeds. This is why coffee beans grow inside of cherries, so it can prevent the reduction of competition between coffee trees that are next to each other.
However, there have been some gardeners who are successful when using coffee on their plants. Melinda Myers says it’s all about how you use them. Some plants do well when they have coffee in their soil, while others are less successful. She did mention that most of the time, coffee does more good than harm.
The trick is using the right kind of grounds!
The best kind to use is compostable coffee grounds. When you start using coffee grounds in your own garden, make sure you start with smaller amounts to see how it works on your plants!