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Entry Date
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Nick Name
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Location
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Wednesday, June 26, 2019
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Matt D.
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Connecticut
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Entry 109 of 210 |
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Potassium (K) Deficiency
This is a great image showing a potassium deficiency. With the recent vine/stem splits that I have been noticing I decided to cut back on water and fertilizer. This is a fine line to play as now my plant is showing a potassium deficiency. This is something that is more typical later in the season so it is a little odd to see it now. However, this is before the main stress of fruit load so this is good to know to ensure I increase my feeding of potassium to help reduce the chance of running into a problem during the growth of the fruit.
Specifically what you are looking for is the yellowing of the leaf margins (edges). While adding potassium will not necessarily cause these leaves to fully green-up you will know you are feeding and preventing a continued deficiency if the newer leaves do not show the same pattern of yellowing. Potassium sulfate is a staple potassium fertilizer since it is 0-0-50, but there are other options. In my case I am also seeing some need for nitrogen since it is mid-season so a product that contains potassium nitrate will be used in my particular case. However, I will be sure to keep potassium sulfate on hand to ensure if the plant needs a potassium boost I can be sure to supply sufficient amounts to prevent a continued deficiency.
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