I've heard mixed opinions on whether adding rocks at the bottom of plant pots improves drainage. Some say it's helpful, while others argue it doesn't do much good. I just repotted my plants, putting a few large rocks at the bottom, some smaller ones in the middle, and mixed small pebbles throughout the soil. I'm curious to see what others think—does this approach actually benefit my plants or could it be detrimental?
3 Answers
I’m not a fan of adding rocks at the bottom either. Instead, I recommend using orchid bark or chunky perlite mixed into your potting soil. This combination can help with drainage without the hassle of stones. A rock on the drainage hole is fine, but rocks throughout the soil can just create more problems.
I’ve tried putting different sizes of rocks in pots too. While a large pebble over the drainage hole is great for stopping soil from washing out, adding rocks elsewhere isn't necessary and might not help with drainage overall. Mixing in some sand or vermiculite is usually better for keeping the soil loose.
I’ve always been told that putting rocks at the bottom helps with drainage because my mom swears by it! But there’s a lot of debate about this. Some experts suggest that while a rock at the drainage hole keeps soil from spilling out, it doesn’t really improve drainage. It might be better to focus on using a good potting mix instead for better airflow and water retention.