My 2nd year of growing strawberries and they are not as sweet as I would like.

On a radio show, the host recommended a 0-0-60 fertilizer to boost the sweetness.

What is the best organic 0-0-60 fertilizer?

I am in the Houston area.

Thanks.

Wood ashes.

Dry molasses is also rich in potassium.
It can be used just sprinkled on top of the soil, or mixed in any organic foliar spray or soil drench application.