Do Rocks Help Drainage? Plant Myths (Video Experiment)

Plant people get pretty heated about this one. I personally think it's a waste of time. It's not going to make much difference to your plant's health. You just don't need to do it. I was intrigued though. So I decided to test it and see whether there was any effect. I weighed the water that came out of the bottom. I wanted to see if I could bust this garden myth with a simple home made experiment anyone could try. Intro: Experimental method: 0.22 Why bother with the test?: 1.07 Why do some soils drain better?: 2.04 Why is gravity and capillary action relevant?: 2.58 The Experiment: 4.21 Results: 5.30 Conclusion: 6.00 I've heard that it can cause the water to collect in the compost above the gravel rather than at the bottom of the pot. This makes sense but I doubt it will make much difference to the health of your houseplants.