One of the signatures of Vitis amurensis is its red fall color. I have a couple of amurensis vines in the vineyard and also a few amurensis hybrids that show red fall color. A beautiful sight. From a distance, their red leaves always pop out from the sea of green and yellow around them.
On a few occasions, people who hand harvest Petite Pearl have complained about the short stems. So, one of the wonderful discoveries this summer was this seedling selection, T.P. 4-2-12, whose mother, ironically, is…… Petite Pearl!
On one of my trips to China, someone plopped a grape cluster in my hands for me to taste. As I held it in my hands it seemed to weigh about two kilos. Later he sent me pollen from this grape. I used the pollen on one of our small-clustered, super hardy varieties. Here is the best of the progeny. Beautiful, multi-stemmed cluster form and clusters typically 500-1000g. And quite winter hardy. If it were only seedless!
Last summer, I noticed a seedling with leaves that have extremely deep lateral sinuses. As deep as you can get, right down to the middle leaf vein. Is this a good trait? Well, the clusters hanging under these leaves would certainly receive more sunlight, a good thing in the north. Maybe you wouldn’t have to remove the basal leaves to get more light on them. Also, you would probably have better air flow through the leaf canopy than in a vine with more complete leaves. This might reduce the incidence of rots and mildews. However, given the reduced leaf area of these leaves, would you need more leaves per shoot to support adequate fruit ripening?