Black Walnut, so yes juglone. I think all the walnut family has Juglone to a degree. I think most English/Carpathian are grafted on black walnut rootstock at least in the eastern states. Worthwhile I would say yes if you have the space, If I was limited on space I don't know walnut would be high on my list.

Have a friend in Flint, MI who's grown a wide variety of nut trees over the years - and he says Kwik-Krop is the best BW in his plantings.
I have it here, but has not borne nuts, so I can't comment on it beyond my friend's experience. In other climates, others may surpass it.

I'm sure you realize how labor intensive most of the walnuts are to shell/extract the nutmeats from. I won't plant one as an edible based on this alone. Working for hours to yield a mess of tiny nut pieces mixed with shards of shell is not my idea of an easy harvest.

The variety does sound like a good one in comparison though...

Really no more labor intensive than a lot of things people do as hobbies. Of the grafted ones I have, Thomas and Kwik Crop have started producing a few nuts now. But I can't really comment on much about them, I'd rather eat a hickory nut.

lkz5ia,

you're remark: "no more labor intensive than a lot of things people do as hobbies"

is probably correct, but since one of my hobbies is harvesting wild edibles, and I have patience for many labor-intensive pursuits (collecting piñon seeds, harvesting and processing prickly pears, curing olives, making mesquite meal, etc...), I can say that shelling walnuts (at least the wild ones I've tried) is in a different category altogether.

I will admit this opinion could change with better tools, methods, and better nuts to begin with on my part...

I have only lately begun to consider the economy of things that I grow as well as taste and usefulness.

Shelling grafted BW is a world apart from wild seedlings, about like good seedling pecans. It also helps to have the right cracker, not just a hammer.