Okay, so I’ve been getting into gardening lately, and I stumbled upon this whole thing about baking soil. The idea is that it’s supposed to kill off bugs and weed seeds, which sounds great, right? But then I started wondering, “Does baking soil kill nutrients?” I mean, if I’m cooking the soil, am I also cooking out all the good stuff my plants need?
So, I did some digging (pun intended!). I found some stuff online saying that, yeah, high heat can mess with nutrients like nitrogen and phosphorus. Bummer. But I wanted to see for myself.

My Little Soil Baking Experiment
First, I grabbed some regular potting soil I had lying around. Nothing fancy, just the basic stuff. Then, I divided it into two groups:
- Control Group: This soil I just left alone. No baking, no nothing.
- Baked Group: This soil I spread out on a baking sheet and popped into the oven.
For the baking part, I set my oven to about 200°F (that’s around 93°C). I’d read that you don’t want to go too crazy with the heat. I baked the soil for about 30 minutes. It smelled kinda earthy, like a forest after it rains.
After the baked soil cooled down, I planted some bean seeds (they grow fast, so I figured they’d be good test subjects) in both the baked soil and the control soil. I watered them the same, gave them the same amount of sunlight, and just waited to see what would happen.
Honestly, it was pretty clear after a week or so. The beans in the regular, unbaked soil were doing way better. They were taller, greener, and just looked healthier overall. The beans in the baked soil? They were kinda struggling. Some of them didn’t even sprout, and the ones that did were way smaller and paler.
So, from my little experiment, it definitely looked like baking the soil did something to hurt the plants. I’m no scientist, but it sure seems like baking the soil at that temperature did kill off some of the important nutrients, or at least made them harder for the plants to use.
My takeaway? I’m probably not going to bake my soil again. It seems like the risk of losing nutrients outweighs the benefits of killing off potential pests or weeds. I’ll just stick to other methods for that, I think!