Proper Planting Of Grafted Vines

Europeans and Californians long ago learned that failures with grafted
vines often came from setting the vines too deep in the soil, the
result being that the cions struck root and became independent,
whereupon the stock dies or becomes so moribund that the beneficial
effects are lost. There are grape-growers who argue that it is
beneficial to the vine to have roots from both stock and cion, but
experience and experiments very generally teach the contrary, it being
found that in most grafts the cion roots grow more vigorously than
stock roots and eventually starve out the latter. The disastrous
effects of cion-rooting are often to be found, also, when grafting has
been done on old vines in the vineyard; and, again, when the graft is
too close to the root system.

Another cause of failure is that different stocks require that the
vineyard soil be treated differently, especially at planting time.
Vulpina stocks require that the soil be much more deeply plowed than
for Viniferas on their own roots, since Vulpinas are deep-rooted and
are exacting in the depth of root-run required. Those who have had
most experience with resistant stocks maintain that all American
grapes require rather deeper plowing than European grapes on their own
roots.

Next: Influence Of The Stocks On The Cion
Previous: Adaptations Of Resistant Stocks To Soils And Climates

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