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Grape trellis posts

Posted by lil_louis z6a NJ (My Page) on
Tue, May 6, 08 at 18:28

I'm about to start my first grapevines and went out to get some cedar for posts -- I don't like to use pressure-treated because of the chemicals. BOY HOWDY is it expensive! My local lumberyard was asking $60 for a 4x4 by 8 foot post! I didn't buy them.
So what else can I use? I understand that I need 8 foot posts - 2 feet in the ground and 6 feet above. Can I use a metal U-post, like the kind they use in my part of the country (northeast) for snow fences? Or would that not be strong enough? Can I use a 4x4x8 Douglas fir, or would that rot?
Also, what kind of wire should I use? Need it be braided, or can something solid work?
I'm planting 2 vines, and the nursery where I am getting them says I need three posts, spaced 6 feet apart. The vines would be planted in between the posts:
POST grape POST grape POST.

Follow-Up Postings:

RE: Grape trellis posts

You should be able to find Black Locust posts pretty cheap in NJ. I live in WV and know of locust fence posts 50 years old that were never treated. I personally use an 8' spacing between vines. I use 2"x3" galvanized I-beams for posts and arms. As for trellis wire, use 9 gauge tension wire for chain link fence. It comes in a 170' roll for $11.31 at Lowes. I use it for my cordon wires and support wire on a Geneva Double Curtain trellis system. Some people use 11 or 12.5 gauge galvanized wire, but I like 9 gauge myself. Make sure to buy single strand wire. Cable would injure the vines since it's rough.

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