The Hidden Killer in Your Garden: Soil pH and the Tomato Crop Soil pH levels have a profound impact on tomato plants.
When soils are too alkaline or acidic, tomatoes starve for essential nutrients, leading to yellowing leaves, dropping blossoms, and stunted growth.
This issue is not new, but its effects have been exacerbated by changing agricultural practices and the increasing use of fertilizers that disrupt soil chemistry. Tomatoes require a narrow pH range of 6. 0 to 6.