I’ve planted 25 merlot vines on 3303 rootstock. My soil is clay rich derived from glacial till. It is pretty rocky. I live on central Vancouver island. I haven’t done a soil test, I will, but published soil surveys indicate that the pH is around 4.5 to 5 and that it has a low cation exchange capacity. This our second year and we have noticed some of the leaves turning red. Most likely potassium deficiency or red blotch, hopefully potassium deficiency. Pictures below. I understand that grapes are heavy potassium users and that suggests it needs to be supplemented as part of crop management. I also understand that potassium is not very mobile in clayey soils.
My question, how do I get potassium to the roots of my vines? I’ve read a heavy application of potassium surface, or drip irrigation with soluble potassium surface. What is the easiest method and does it work?
Two of our vines have grapes, tiny little clusters.
My question, how do I get potassium to the roots of my vines? I’ve read a heavy application of potassium surface, or drip irrigation with soluble potassium surface. What is the easiest method and does it work?
Two of our vines have grapes, tiny little clusters.
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