We added too much ash right before planting last year and it caused problems like you are describing. Good thing you are in Texas,not much of a growing season here in Mn,mistakes in gardening really hurt!Several years ago I had a bonfire in the field behind my house. We talked about this in the transplanting pepper plants thread.
I found out if there is too much potash (potassium) in the soil, the potash will prevent the uptake of nitrogen to the plant. To counter this, use a high nitrogen fertilizer which makes the soil more acidic.
Just about everything I planted in this patch of soil has not grown.
Potatoes - rotted in the ground
Purple hull peas - dd not come up.
Snap beans - did not come up.
Pepper plants - most died and others are not growing.
I am going to move over and replant everything in an area not affected by the bonfire.
I Made a Big Mistake Spring Garden 2018 - YouTube
For 2019, I am thinking about planting the area with corn, and using a very high nitrogen fertilizer. The high nitrogen should turn the soil slightly acidic.
We uncovered an old fire pile when we moved to our ten acres and it grew one heck of a crop of mint!