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overlapping grape vines

Posted by blaferby CA 9 (My Page) on
Thu, Mar 13, 14 at 14:45

I have 3 year old grape vines on a 20' long trellis; 3 plants spaced 10' apart with support stakes in the middle of each section. I have read that the arms coming out of the vines should meet but not overlap each other. This is also what I see in the multitude of vineyards around our town of Lodi, CA. I'm wondering if anyone might know the reason for this? They are currently overlapping but can be cut back if needed. My wife is of the mind that they will produce more fruit with more length, i.e., overlapping as they are now. I'm not sure. Also, the 3 plants are different varieties.
Ideas? Thanks

Follow-Up Postings:

RE: overlapping grape vines

  • Posted by murky z8f pnw Portlan (My Page) on
    Thu, Mar 13, 14 at 18:10

Overlapping will be crowded, reduce airflow, keep leaves wet, reduce light penetration for fruit development, and be more conducive to fungal growth.

RE: overlapping grape vines

  • Posted by fruitnut z7b-8a,4500ft SW TX (My Page) on
    Thu, Mar 13, 14 at 18:33

It really won't hurt anything in your dry climate but it won't increase the yield either because the plants are competing with each other. If you want to increase yield make the trellis longer or wider. Yield is proportional to amount of sunlight intercepted.

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