Grapes 3rd year

[justwannano]

This is the 3rd year for my Grapevines.

I have 9 vines 3 different varieties.

2 of the concord vines have what I'm thinking are way too many tiny clusters on them.

How many clusters can a young plant nourish?

I was thinking that I read to cut them back to 17 clusters per plant but I cannot find that info now.

I'm using the cardon*method of trellesing but with 3 wires.* I don't remember where I read to do that either.

The Niagra and catawba vines aren't so energetic as the concord.

thanks for any help

just

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[Newt]

For the Cardon system you will find the info on page 4 here.* You are correct that you will need to thin out the clusters as overcropping will result in poor fruit quality.
http://www.ces.ncsu.edu/depts/hort/hil/pdf/hil-8202.pdf

More info here on Cordon if you scroll down.
http://extension.missouri.edu/xplor/...ort/g06090.htm

Does that answer your questions?
Newt