Potatoes in Southern Calif.

San Marcos, CA

Does anyone know why potatoes grew massive gorgeous vines, but not as many potatoes as they should have had?
Another problem was that a few of them had some sort of ugly malformation with an odd texture in the flesh.

Augusta, GA(Zone 8a)

I don't know your conditions, But here in the east massive vines with low yield is usually the result of a nitogen ratio that is too high. A ratio of NPK of 1-2-3 works well for me.
There are two soil borne diseases that hit here that exacerbated by soil conditions, Scab and Black Heart)

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