Growing Grapes in Texas Jim Kamas Central Texas Gardener
I love Tait Moring's sense ofgardening style. Thanks so much for opening your gates for us. Right now we're going to talk aboutgrowing grapes. One of the hottest topics here in Texas because of all the wineries. We have Jim Kamas with us. It's great to have you back on theprogram. Welcome. Thanks, Tom, I appreciate it. Welcome back to Central Texas Gardener. You've just published a great new bookGrowing Grapes in Texas.
Congratulations on that! Thanks a lot. It took a couple years to get done, but I'm I'm pretty happy with it. Well you know, like I said, it's a hottopic. A lot of people are very interested in growing grapes in their backyard. Maybe one ofthose famous table grapes, like Concord or something like that. Well Concord ispretty tough to grow here. Concord likes acid soils which we don'thave. And it's much more adapted a cooler climates. If you wanted to grow Fredonia or some of the other lebrusca types, they'll work, but
Concord is a pretty tough one to grow here. Ok, well your book is filled with tips aboutvarieties and things like that. Let's focus on that home grower. You know , I know for example I go out to hillcountry every now and again to go to Fredericksburg, places around there. And I see wineries springing up like mushrooms now. And it kinda makes me wanna grow grapeshere in town. What does a home gardner need to know to get startedé Well if you're a homeowner and you want to grow enough vines to produce a little bit of wine
my advice is plant what you like. If you're planting a commercial vineyards we're going to have a very different discussion. But if you like Merlot, plant Merlot. If you like Syrah, plant Syrah. For smallscale, you have no big economicinvestment, so plant what you like and go with that. Yeah okay, that makes sense. In terms of the space needs, the sun,
all those kinds of things, grapes arerather particular and disease prone. Yes. So let's give people an idea of whatthe basics are that they would need to have any kind of success. Sure. Commercially our rows are spaced nine to ten feet apart, but in the backyard if you are maintaining the row centers with alawnmower or something, you can place the rows as close as six feet apart.And you can also go as tight as five to six feet between vines. You can put a lot of vines in arelatively small space.
So small space is OK. When we talk about the rows, we are talking about providing structures on which the the vines can grow and supportthemselves. Yes, a lot of times in California you'll see these free standing vines that are called head pruned vines. They don't do very well here because we need to keep our vines up off the ground because it rains here duringthe summer and they are very disease prone as you mentioned.
Growing Grapes for Wine
The way that Remember when we were standing out in the vineyard, we were looking at all these clusters and we were saying quot;this is too much fruit we're going to have to thin thisquot;é The person who created the system for figuring out how much that fruit was going to weigh when it was harvested long enough in advance, i.e. now,
so that we could do something about it to get the crop right, was Steve Price in the Hort department at OSU in the 80s who came up with this simple system that is used all around the world now to predict crop level. Well the system is You'd think that somebody would have
figured this out in advance of 1980s Corvallis, but nobody had. You basically wait until the sort of one to two week window when the grapevine shifts gears. It's been sort of building the cluster weight and growing all at the same time, so that the
are still growing and the clusters, the berries, the individual berries, are still getting bigger. And they'll continue to do that until sometime in late July basically, maybe early August. But then there's this window where the vine kind of changes what it's about to do, because from then on it's going to be all about
making sugar and growing the grape size. But for the two weeks, sometimes only a week and a half, the grapes don't change weight. It's a lag growth phase. And if you weigh the grapes at that point, and do a good job of estimating how many grapes are out there
and you double it, you basically know what the weight of that block that you just estimated. Obviously it depends on grape estimation skill and it depends on, to some extent, on the year because not every year does it double. There was a year a couple years ago where it didn't really double.
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