I don’t mulch mine at all. Interesting about the seed grown having better root structure. The most resilient pom I have is a seedling. It is the most heat and cold tolerant one I have. The named varieties were severely damaged in our protracted 10° freeze in '21. The seeding sailed right through it all. D
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I think that seedlings are only better in those ways if they are in the ground, not in pots/containers.
As far as cold hardiness, and drought resistance, some seedlings seem more cold and drought resistant than others, we have a pomegranate plant type that even as seedlings they have a slow growing root system, which I think is why they are drought sensitive, yet it seems that in time as the roots finally catch up the plants get very drought resistant. This pomegranate plant type has not really been tested well for cold temperatures, yet I think that the same will be true of it’s cold resistance, ‘as the roots catch up’.
In time I will experiment with grafting on to seedling root stocks, with the more cold hardy cultivars grafted on to the root stocks.
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