GROWING GRAPES IN THE CANADIAN COLD
A presentation by Bert Dunn to ![]()
the First Annual Central Ontario Viniculture Association Seminars
LETS START WITH YOUR SITE
If you're going to grow on your own property
there is little you can do about topography,
or location of buildings.
If in an urban lot your planting site is predetermined.
If you have acreage and a slope, which is the best site?
Any small trees or shrubs in that area? Will they shade
your grape area in the future? If so cut them down while
they are small.
If you have no hedging or fencing on the windward
side consider planting cedar or other dense
hedge. Until your hedge is grown , snow
fencing- even if in poor shape is valuable.
If you or neighbours are growing veggies & fruits your
soil is likely between PH 6.5 and 7.5-- fine for grapes.
If in a subdivision with 3 to 4" topsoil on clay- add
sand to help break up the clay.
Consider the three magic ingredients in starting new
grapes- water, water, water. Will you just need a pail-
or will they be within reach of a hose? If not
prepare to haul a lot of water.
You must water new plants the first year and if
the second year is exceptionally dry- water
as needed.
NEXT COMES VARIETIES
Some varieties fruit well after -40'F while some may
not survive -20'F. Find your winter lows to
eliminate varieties not likely to survive at your site
in a test winter.
There are grapes for wine, fresh juice, jams &
eating. Some varieties are multi purpose.
Why are you planting grapes? --eating, wine or for sale?
How many are you going to start with?-- Your possible
ultimate number?
If you're going into pick-your-own identify your
potential market-- plant a variety of
red, white, wine, eating and so on. The public are
fickle & if you've only red for wine and white
becomes "flavour of the month" - you'll miss some sales
opportunities.
Most of you want wine grapes- you know the "big
reds", the "flinty whites". If you're in zone 3,
4 or 5a you should consider widening your taste
buds or buy some land in P.E.C or Niagara.
In 4b we have started Morio Muscat, Riesling
21b, & others- all winter killed within 2 years.
Be an optomist & plant a few marginal hardy varieties
for your area . Also be a pessimist & plant some
hardier- than you feel you need. When we have a very
tough winter- which we have not had for some years-
you'll still have a small crop.
There are many excellent female grapes, sometime called
pistillate. Plant these varieties within 8-10' of a
non-female grape. They need pollination to fruit.
Many fine very hardy grapes are available- Beta,
Chontay, Valiant, Minn 78, Frontenac and so on. Some
make unsatisfactory wine, while others make decent wine.
Elmer Swenson of Wisconsin must be mentioned in a
hardy grape discussion. Elmer has hybridized 1,000's
of grapes including St. Croix, Kay Gray, Prairie Star
for the Minnesota, Wisconsin and North Dakota growers.
Happily many of his varieties are available in Canada.
At about 85 years of age he still is breeding grapes
for the north.
With hardiness as one of the principal objectives-
Elmer, University of Minnesota, David MacGregor and
others are breeding many, many new hybrids for
better wines, better eating,& of course greater hardiness
There is much exciting news to come in the next
few years out of Minnesota and other northern states.
There are hardy breeding programmes in Belarus, Russia
and the Baltic States. I know of only one person in
Canada- in Brandon, Manitoba- who is working on hardy
grape breeding. I have his Valiant/Severnji hybrid,
he calls GB1.
Unhappily new American and any other Non-Canadian
grape hybrids take many years of quarantine in
B.C. before being released to you & I in Canada.
Lastly on varieties,if you have children
or grandchildren plant a few seedless or good
eating grapes for them.
NEXT WE'LL DISCUSS IMPROVING WINTER PROTECTION
Have a windbreak, a hill, berm, buildings,
trees, snow fencing.
Have your plants in grass.
We simply mowed our fields and planted
in this mixture of meadow grass & weeds. A lot of
e-mails have recommended certain cover crops-
each saying how/why their cover crop was best. Our
grass and weeds work for us with less work and cost.
Our rows are mowed from spring to around Sept 1st
We want our grass and weeds to grow to
trap snow. The snow reduces temperature
fluctuations in soil below the grass.
Bare soil picks up heat even in the winter. Freezing-
thawing is very hard on root structure. Bernie
Nokolai of Edmonton e-mailed that soil under 4-6"
of snow rarely goes below -10'C.
Plant deeper than soil level- say 5" or more. In
fall add soil to the hole as the height of
your new plant will allow. This places your primary
root mass well below soil level.
A grower out west with several acres plants his
new vines in virgin fields- never plowed. Holes are
dug 12-15" deep- cuttings are placed in bottom & filled
in 6". As the cutting grows the holes are slowly filled
in. With a -50'F cold snap, the grapes came thro winter
fine. I assume they had lots of snow.
Some growers add 6-12" hill of soil around each trunk
for winter. Easy for 1 person if you have 10 vines-
hard to do if you have 400.
Some growers remove vines from trellis & bury. When you
uncover in spring, get them on trellis immediately
as tender buds may be killed in a cold snap.Temp
at ground level is often much colder than 3-4 feet
up on trellis. A lot of hard labour in this method!!
Between hilling up and burying is fan trellising.
Here you could bury the small trunk instead of
laying down the entire plant.
I recommend no fertilizer the first year. In subsequent
years suggest no fertilizer after August. The plants
need to slowly start shutting down for winter-
translocating carbohydrates to roots for next spring's
growth.
In late summer except for minor leaf pulling around
clusters to colour them up, do very little pruning.
Pruning may cause a growth spurt- this soft new wood
is more likely to winter-kill.
Consider a 2 trunk vine (I use a modified Kniffen system)
If one trunk is winter killed or rodent or machine
damaged you still have 1 trunk in production until
a new sucker matures to replace the dead one.
NOW THAT WE HAVE DISCUSSED SITE- VARIETIES, AND WINTER
PROTECTION OUR LAST SUBJECT IS COST
Purchase of grape cuttings or plants is the beginning
of your costs.
You may consider having post holes dug for you. After
we rented a two man post hole digger, and were thrown
to the ground several times we decided to hire a chap
with a tractor with a PTO & auger. He did over 60 holes
in a morning. Well worth the cost.
Cedar poles come pressure treated, creasote dipped
or plain.High tensile wire, tightners & grips, along
with the special tools needed will increase your cost.
If you're planting acreage you may need a tractor
to mow the rows. As one gets older more mechanical
equipment becomes a necessity.
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