On 2/19/2016, buds were chopped for winter survival measurements on 7 sentinel varieties at the University of Minnesota research vineyards at the Horticultural Research Center. The data represented here are just an example using a small sample number of canes, buds, and cultivars. Only 4 canes, 8 buds each were evaluated (32 total buds). We urge you to begin sampling your own vineyards as there is some evidence of damage. At this point, no changes would be needed to pruning based on these results at this location. More complete data will be presented in coming weeks.
Cultivar Primary Bud Survival
Frontenac gris 97%
Frontenac blanc 84%
La Crescent 91%
St. Croix 91%
Some Early images from a grafting ‘experiment’ with Ampelopsis as the scion wood (top part as a cultivar), and a hybrid rootstock from the UMN breeding program.
Starting to see callus formation at the graft union. We use the Ryset grafting tool which just like cutting puzzle pieces.
On the bottom we see callus where roots will soon start to form. The next step for us is to dip the top of the plants in melted wax (covering the bud and graft union) to prevent excessive evaporation, and to stick them in a potting media for rooting in the greenhouse. We will also likely remove the wire ties to prevent girdling as the stems begin to grow radially.
We are feeling pretty optimistic, but only time will tell if these grafts are compatible.
Savor Minnesota is a rare opportunity to taste everything Minnesota wineries have to offer, as well as samples from dozens of craft breweries and food producers, all in a single afternoon. The sixth-annual Savor Minnesota is Saturday, April 16, 2016, at Canterbury Park in Shakopee. Explore the wines produced in Minnesota in this event sponsored by the Minnesota Farm Winery Association.
Developed at the University of Minnesota, ‘Itasca’ is the newest wine grape that will be available to growers in 2017. Offering disease resistance, winter hardiness, and improved wine chemistry such as lower acid than other hybrids, ‘Itasca’ will create new opportunities for grape growers and wine makers in Minnesota and across cold-climate wine growing regions. Read more about it here.
Registration is now open for the 9th Annual International Cold Climate Wine competition. Click on the logo to learn more.
Winter is Minnesota can be one of the most challenging times for the grape plants. It's the main reason V. vinifera varieties aren't grown here. Learn a little bit about whats going on in the vineyard in winter.
Wine making is a rewarding career, but is not free from headaches. A wine maker's nightmare is the re-fermentation of sweet wines and the instability of some wines. This blog entry addresses the topic and offers some strategies to avoid and mitigate a potential devastating re-ferment.
Are you curious if your wine is finished with malolactic fermenation? Here is a quick reminder on how to test with paper chromatography.
ALERT: September 27, 2016. Spotted Wing Drosophila (SWD) in Grapes: A short memorandom on SWD in Minnesota and associated volatile acidity. Read more here.
Fall vineyard managment should focus on managing insects, vertebrate pests, rots, and diseases that will impact the vines in the next growing season. Making quality wines requires disease intervention and sorting, as infected fruit will impact wine quality. Read more here.
“From Vine to Glass: Understanding the Flavors and Aromas of Cold-Hardy Grapes and Wine”
Tuesday, May 17th*, 2016
12:00 Noon Eastern (11:00 am Central)
7:00 pm Eastern (6:00 pm Central)
*Please note this is a date change from the original date of May 10th.
Join Anne Fennell of South Dakota State University, Adrian Hegeman of the University of Minnesota and Somchai Rice of Iowa State University as they discuss their research conducted on Marquette and Frontenac as part of the Northern Grapes Project.
Friday April 29, 2016
This Saturday April 16, 2016
The University of Minnesota releases its news wine varieity 'Itasca' on April 4, 2016
Experimenting with different grafting techniques including grafting Ampelopsis with a hybrid rootstock.
Early bud chop counts on cold-hardy cultivars at the HRC