Grape Vine Dormancy
Hi grape growing friends.
Yep, it’s weekend again and I’m surely looking forward to sit back, put my feet up and enjoy the a nice cold one after a tough week – I’m sure most of you feel the same way
Well, this article is about the dormancy and the post-harvest treatment of the grape vine, since most of you guys and girls from the northern hemisphere is close to winter now and you vines are most probably dormant already. Okay, so enjoy this article…
The post harvest treatments when growing grapes, is very often overlooked by grape growers. Since picking or harvesting the crop is over and you probably already enjoyed the fruit of you labour, you stop looking after your grape vine – BIG MISTAKE!
Not taking care of your grape vine in the post-harvest period, could result in big problems during winter or the next growing season. When done harvesting, the grape vine is still physiologically active, although it might look like there is no active growth! The roots of the grape vine is still active, long after the shoots stop growing.
The post-harvest period, is where you prepare your vine for the winter and the next growing season. During the first stages of dormancy, the roots of the vine takes up nutrients to store as energy, needed for the developing shoots in early spring, the following season.
Yes, the grape vine actually goes through a phase called “root flux” where more than normal root development takes place and this is the time when you would want to apply a post-harvest fertilizer.
In dry conditions or climates, you should not stop watering the vine, although much less water is needed. As the grape vine slowly goes dormant, the ripening the shoots will take place and the vine will get ready for winter (harden off).
Very little people actually knows what dormancy is, so here is an article I wrote a few months ago.
The three dormancy stages a grape vine goes through – by Danie Wium
1. Summer rest
Yes, there is something like summer rest. From the time the buds were formed until fall, many buds that don’t sprout, are in what we call summer rest, and because of the presence of grapes, leaves and growing points, these buds will not shoot or sprout. To proof this, you will notice that after a vine is hale damaged or a heavy top action, these buds starts to shoot. In some hot subtropical and tropical areas, only a small prune wound is enough to let the vine break out of dormancy and it will start to shoot, if the winter temperatures in these areas are high enough, a second yield can be harvested!
2. Winter rest
After the first cold nights during fall, the vine will go into what we call winter rest. This is a deep state of dormancy. Experiments on vines revealed that the artificial breaking of this dormancy would result in a very uneven shoot of the buds.
3. Normal rest
During normal rest, the vine has come out of winter rest because of the rise of the average temperature when spring is about a month away. Many grape growers will artificially break the rest period of the vine with a RBA chemical. Earlier and more even sprouting occurs, and harvest time will most of the times be a week or even two weeks earlier.
In the tropical, hot areas of the world, the grape vine seldom goes dormant as the temperatures are too high, these areas can produce two crops per year, but special care must be taken to feeding and watering the vine.
Where the winters are cold, it is normal for a grape vine to loose it’s leaves and many newbie home grape growers, think there is something wrong with the vine or the vine is dying. The vine losing it’s leaves, is preparing to go into dormancy and this is when energy is accumulated for next year’s growing season. Applying a light N fertilizer (20 kg per ha or 300 ounces per acre) during this stage has many advantages, as the roots of the vine are still active. These N is stored in the roots, canes and framework of the vine. When spring arises, the vines use this N to sprout. Little to no watering is needed during dormancy, depending on how dry the winter is. If you live in an area where no rain occurs during winter, you can water the vine once every two weeks.
Right, so be sure to look after your vines, even if you already enjoyed the fruit of your labour!
For members of the Complete Grape Growing System, I’ve added a new download link from you membership site, where you can get more info about the post-harvest treatments of the grape vine. Simply log in at www.my-grape-vine.com/members/ or if you decide to join us now for only $29, simply click here.
This is the start of what you can expect from the New Complete Grape Growing System – surprise bonus articles and downloads!
Hope you have a wonderful weekend and will talk to you on Sunday, where I will show you some pictures of how we are doing, repairing the flood damage.
P.S Won’t you feel much better, knowing that the next time you go out into your vineyard, you will know exactly what to do? Secure the lowest price by clicking here to order.
P.P.S Don’t forget to download your Bonus videos after you ordered the Complete Grape Growing System. This will forever clear all the mysteries there are about pruning grapes!
P.P.P.S Also remember, that you are ordering this product at absolutely no risk to you. So grab this special price while you can! If the Complete Grape Growing System isn’t everything you were expecting, simply notify me within 60 days and I will refund your money immediately.
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