Native and Garden Flora
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~ personal observations ~
I may occasionally go off topic.
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The University of Arkansas’ latest table grape ‘Compassion’ compared to their other releases.

Compassion was considered to be nearly as good in flavor as their top rated variety (Jupiter). However, Compassion has a much firmer texture and, unlike Jupiter, is said to rarely be astringent.

One of the most important advantages of Compassion is a later bud break, 6-10 days after Jupiter in Arkansas, which helps them avoid frost damage. The cold hardiness of the vine itself is unknown, but it is not expected to be as tolerant as Jupiter (refer to my previous post for details).

Disease resistance was not properly tested since fungicides were used, but Jupiter struggled with leaf disease on occasion when Compassion did not, implying that it is more resistant. Fruit diseases were not mentioned, but Compassion forms tighter clusters, which can encourage problems.
Yoinashi Asian pears don’t have as much flavor as Shinsui, but they are said to have greater resistance to disease, which has been my experience. Both varieties were grafted next to each other on one well-established rootstock just over 2ft off the ground a few years back. Shinsui died immediately the next spring from a pseudomonas infection of the wood, but Yoinashi never displayed signs of the disease.

Fireblight is the other disease Yoinashi is mentioned for having at least some resistance to, and it is one of the few Asian pears known to possess resistance to both. However, (while its texture is fine) it is often implied that it may not be as good in quality as the others, but I opted for Yoinashi because I figured it would be a better fit for my climate, since it doesn’t seem to be as reliant on heat.
Chang Bai hardy kiwi (Actinidia arguta) produces large berries compared to most varieties from this species, but their quality is pretty average if not variable. While I like the aesthetic of the vine, I much prefer the flavor of Anna, which isn't quite ready yet.
Forwarded from Native and Garden Flora
Jupiter grape is currently my favorite American hybrid. The flavor is similar to some of those at the store, but it is fruitier and generally more astringent. Unfortunately, I have had some trouble with dieback in an area that frequently experiences zone 5a temperatures, but it is holding up well enough to keep around for awhile. It is possible the vine wasn't as tolerant of the cold as it could have been due to extensive leaf damage and some exposure to shade during the grow season, since Jupiter only experienced "some" dieback after being exposed to -26F during a trial in Indiana.
Fall colors helped me spot nearly a dozen more wild gooseberry plants that I was previously not aware of. Strangely, every one I did know about is still primarily green and are only turning yellow.
Peaches from seedling trees, some of which are supposedly from the cold hardy Siberian C strain. They can be quite small and don’t store as long, but they have a very good flavor.
The 'Anna' hardy kiwi is currently one of the things I look forward to the most. It has a fairly unique flavor, and out of the vines I have seen, it also develops the most attractive fall colors. Anna is one of the last varieties to ripen, and while there are still some on the vine, they were ready quite awhile ago. Generally, they start to ripen asynchronously around the beginning of October in my climate, but once they reach this point, the firm berries can be harvested and left to finish on the counter. This year, everything is one or two weeks behind.

With the exception of their fast growth, which may be a problem for some, hardy kiwi are quite easy to manage since they are relatively pest and disease free – especially in the north. Regardless, they are difficult to recommend for anyone who does not live relatively close to the ocean or a great lake. Their fruiting shoots are quite vulnerable to frost damage, and most other places in North America have a very unstable climate.
The one thing that got me interested in pomology and genetics is the realization that, in-spite of their dissimilarities, the only difference between a peach and a nectarine is the mutation of a single gene.