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Old 06-21-2013, 02:12 AM
Skipster Skipster is offline
LawnSite Senior Member
 
Join Date: Dec 2010
Location: Billings, MT
Posts: 655
I hear a lot of things like this all the time. Fert salesmen and people who don't know any better refer to K as the "stress nutrient." But, no research has ever supported that notion. Most research involving K and stress report that when K is not deficient in the soil, plants tolerate stress better than when K is deficient. They go on to say that adding K when soil test K is not deficient does not improve stress tolerance.

So, if you want to be sure, test your soil and see where the K levels are. If they are deficient, you might benefit from K applications. If they aren't deficient, adding more K won't help you.
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