Return to the Fruit & Orchards Forum | Post a Follow-Up

 o
One or two wire grape trellis

Posted by midlin 5B (My Page) on
Thu, Dec 13, 12 at 0:17

Is single wire better than Geneva double curtain?

Time to trellis 5 new grape vines planted this year. I have 9 gauge wire and three 8 foot posts. Any suggestions how many wires to use? There are 2 Reliance, 2 Canadice, and a Jupiter in a single 40 foot row, so there is space for a Geneva double curtain about 3.5 feet apart.

I planned on a single wire at about 6 foot, but maybe I should have a 4-arm Kniffen at 3 and 6 foot or a 2-wire Geneva double curtain at 6 foot? Simple care is better, and I am concerned the double curtain would tangle together. I have seen spur pruning advised for these varieties. Any advice?


Follow-Up Postings:

 o
RE: One or two wire grape trellis

  • Posted by fruitnut z7b-8a,4500ft SW TX (My Page) on
    Thu, Dec 13, 12 at 9:53

I'd prefer the single wire at 6ft or GDC. The yield should be somewhat higher with GDC because the canopy will be larger and intercept more light.

Having a wire at 3ft and 6ft never worked well IME. The canes on lower wire get shaded out by the higher wire and add little to production. Just don't see the reason for having fruit buried below a higher canopy.

I've grown all of those cane pruned with good results. Haven't tried spur pruning.


 o
RE: One or two wire grape trellis

I use rebar, but @ 40ft might get too expensive. Don't have any problem with production on the bottom row.


 o
RE: One or two wire grape trellis

This photo was taken 2mo ago. The grapes have lost all their leaves now.


 o
RE: One or two wire grape trellis

Thanks Fruitnut, and glad to hear about the cane pruning since easier. Are the 'somewhat higher yields' worth the trouble of GDC? Do GDC get tangled? I don't mind building it, but I would prefer easy vine maintainance unless the yields are significantly higher with GDC (1.5-2x?), or the vigor of the vines are easier to manage with GDC. If I do the single wire (which I am leaning towards) it will be one at 6 feet, and I will have 8 foot per vine. Suggestions if that is enough room per vine?

Thanks campv- I have a big spool of 9 gauge already. Why is rebar better than a heavy wire? Not having to re-tension?


 o
RE: One or two wire grape trellis

  • Posted by fruitnut z7b-8a,4500ft SW TX (My Page) on
    Thu, Dec 13, 12 at 11:26

midlin:

My GDC is at 7.5ft height. I like this because I can thin and harvest from below. Besides it looks nice. But it won't out yield one wire by 50% unless the wires are more than 36 inches apart.

My vines don't get tangled any more in GDC than with one wire. I love pruning both.

Eight ft per vine is enough.

Az is different than a more humid climate as to having fruit buried in the canopy. And the vine pictured above looks barely trained to me.

Here's a picture from under my GDC this summer. These are first crop, second leaf, potted plants so not much fruit.

Photobucket


 o
RE: One or two wire grape trellis

Mid-lin:

I grow Canadice and Concord on a 4-arm kniffen system. I have the lower wire at 3' and the top wire at 6'. While this system works for me, I too have found that the canes on the top wire produce much more fruit than those on the bottom wire. I leave about 10-15 buds per cane on both top
and bottom wires when pruning so I can only assume the difference in yield is due to sunlight differences.

I grew up with grapes pruned to a 4-arm kniffen system so
I am not changing now, but cordon pruning has always intrigued me.


 o
RE: One or two wire grape trellis

  • Posted by glib 5.5 (My Page) on
    Fri, Dec 14, 12 at 13:56

Beautiful pictures as usual, FN. But how do you arrange for pollination inside your green houses? It is a question that occurred to me when I saw no wasp damage, then I remembered that you grow indoors. Obviously, insects must have free access in spring and late spring.


 o Post a Follow-Up

Please Note: Only registered members are able to post messages to this forum.

    If you are a member, please log in.

    If you aren't yet a member, join now!


Return to the Fruit & Orchards Forum

Information about Posting

  • You must be logged in to post a message. Once you are logged in, a posting window will appear at the bottom of the messages. If you are not a member, please register for an account.
  • Posting is a two-step process. Once you have composed your message, you will be taken to the preview page. You will then have a chance to review your post, make changes and upload photos.
  • After posting your message, you may need to refresh the forum page in order to see it.
  • Before posting copyrighted material, please read about Copyright and Fair Use.
  • We have a strict no-advertising policy!
  • If you would like to practice posting or uploading photos, please visit our Test forum.
  • If you need assistance, please Contact Us and we will be happy to help.


Learn more about in-text links on this page here