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Potash Deficiency

A new question dropped into the Ask Gardenerd inbox this week: 


“Lovin’ [your] podcast since 2009!  My soil test recommends 15-0-15 for potash deficiency. Organic sources would be….what?  Wood ash,
greensand, kelp meal?  Do you have preference?  I’m told wood ash (easiest and free) leaches out faster and has other elements too, ones I don’t need to supplement like calcium and
magnesium. Just wondering what you think…”

First of all – thanks for …

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