Dormancy Flashcards
1
Q
What time of the year do vines go into dormancy?
A
North: November-March (11-3)
South: May-September (5-9)
2
Q
Why does dormancy occur?
A
Average air temperatures below 10C/50F are too cold for the vine to grow, and therefore in the winter the vine is dormant.
3
Q
How does the vine support itself through dormancy?
A
Until it has grown new leaves, the vine supports its growth using stores of carbohydrates, mostly starch, accumulated during the previous growing season in the roots, trunk, and branches
4
Q
What low temperatures are damaging to vines?
A
- temperatures below -20C/-4F
- temperatures below -25C/-13F will kill most vines
-problematic during winter in Canada, New York State, and China
5
Q
Which important vineyard activity is done during dormancy?
A
Winter pruning
