If not arguta kiwi then arctic beauty? if not a female kiwi for better yield in full sun, perhaps a good place for the male vine?
Jocelyn Campbell wrote:
Years ago, I took a class on growing kiwis at Seattle Tilth. From what I recall, the fuzzy kiwi is a huge nitrogen and water hog and since one vine can be laden with 200 pounds of fruit, it was recommended to use, at a minimum, 6" square posts for your trellising. Not exactly tree trellis friendly.
As you probably know by suggesting them, the arguta, arctic beauty and more hardy varieties are more shade and cold tolerant than the fuzzies, and usually have smaller fruit, too, so would likely be less of a potential threat to a tree. I just purchased a self-fertile, supposedly container friendly issai (sp?) hardy kiwi variety that I'm trying here at my condo. I wonder if it would be gentle enough for tree trellising?
The class said kiwis require massive nutrients (planting in soil that was akin to compost was literally recommended) and ample water, which can be difficult around the base of trees. My sister recently commented that her vegetable annuals just don't survive well when they are too close to her trees' drip lines.
So this makes me wonder, could even a nitrogen-fixing tree out-compete a kiwi for nutrients and water? How do the Mediterranean tree-vine-crop growers compensate for the trees' potential dominance?
I don't quite understand your logic in the first paragraph, many trees are much large in girth than a 6" post. The trees I am thinking about are certainly larger than that.
Toby Hemenway wrote:Kiwis are awfully aggressive for trellising up trees. I've seen one kiwi pull down a full grown apricot. In general, trellising edibles up trees is a nicer theory than practice, because harvest becomes very difficult. The major edible vines are very vigorous growers and will choke or shade most trees after 5 years or so. They do it in Italy, but mostly the vines grow on wires between the trees, and they prune the vines away from the trees.