Yeah you should check your local nurseries for dirt. Sometimes you could end up with stuff just as good for way cheaper. The mix i use is made at my local garden shop but it stays outside which means insects and things of that sort are usually in the soil. I got some kind of little roaches from this dirt and had to get a fogger after one of my grows. Since then i usually microwave the dirt or put it in the oven are though 10 mins in the microwave is enough to kill just about anything, including beneficial bacteria in the soil.