Is 13-13-13 fertilizer good or bad for Central Texas soils? If you garden in Central Texas, you’ve probably seen bags of “all-purpose” fertilizer labeled 13-13-13 and wondered if it’s a safe default. It isn’t—and in our region, it can actually make things worse. Our Soils Aren’t a Blank Slate Most soils across the Hill Country and surrounding areas are naturally alkaline and already high in phosphorus (P). This comes from the underlying limestone geology and years of fertilizer use. A soil test from Texas A&M Soil Testing Lab will often [...]