Potatoes

Photo: Thinkstock

1 of 4
Root Vegetables: Potatoes
These root vegetables tend to absorb the fungicides, herbicides and pesticides in the soil they're grown in. By buying organic varieties, you avoid all of these threats. In case you can't find organic potatoes, try sweet potatoes; they are usually grown with less pesticides overall.

Cost: Organic potatoes cost about $1.49 per pound at grocery stores.