Hi guys!
I would like to introduce another species to my orchard for testing, this time from the Carya genus. Of course, pecan would be the best, but I don’t know if it will cope in conditions similar to those presented below. I was initially considering ‘Major’ + ‘Green River’ or ‘Colby’ + ‘Peruque’ instead.
Thank you in advance for any help!
You have some very mild winters in Wrocław… The nurseries in southern Slovakia and Moravia sell Carson, Snaps and unspecified ovatas, but then we do get -12°C most winters and these should be hardier than what you need.
Being honest I live 60km away from Wrocław (going north). I showed data from this station cause it’s the nearest one for me. But as I read some grape growing forum SAT for my location is a little bit lower than Wrocław. Importing stock from whole EU wouldn’t be a problem, I’m only afraid of a short/cool summer compared to the USA and low rainfall. By the way last winter the temperature didn’t fall below -20°C and it was probably for 2 days, most days were around -10°C. In turn, the coldest year was about 15 years ago when the temperature dropped to -25 ° C.
Your best options for pecans are Campbell NC4 (type 1), Warren 346 (type 1), and Lucas (type 2). Pecan needs both type 1 and type 2 planted nearby to pollinate each other. You may also be able to grow Hark (type 1) and Kanza (type 2) but I suspect summer heat units will not be quite enough for them. Your climate is roughly similar to parts of Wisconsin in the U.S. Qroksy is in Croatia and sometimes posts here. He has a fairly large number of pecan seedlings including quite a few from Kanza.
Here is a link to a thread on pecans that includes a few sources in Europe. See post 151 by Barkslip.
I wasn’t sure about Warren 436. I saw different opinion about his pollination type, where most says that it’s Typ 2. How about the low water supply ? I trought about planting them below the ground level, near a drainage ditch, use some wood chips for mulch.
By the way, do you know when Dale selected it from the wild ?
Pecan grows tap roots which can pull water from up to 50 feet deep if it can grow that far. It is very vulnerable to dry conditions the first 2 years in the ground. Pecan benefits from irrigation, particularly on upland sites. While the species is able to survive dry conditions, the nut crop may fail. Pecan also has a few specific nutritional needs such as readily available zinc and nickel.
Read Bill Reid’s writing about varieties for more detail.
Pecan dichogamy is caused by winter chill with more or less chill hours flipping some varieties from protandrous to protogynous and vice versa. If you can get the varieties suggested, you should have no problems with pollination.
Thanks a lot! 
I had contact with another grower from my area (100km in northern direction from me). He have all three which you mentioned and Cornfield, Mullahy hican and something other which is too young to produce nuts. So I get another thought… Maybe I could collect more genetic diverse material for future generations to made crosses…
I selected this natives for outdoor planting
, I only don’t know if it’s make any sens. Maybe a better way would be basing on ultra/far northerns which I listed to create a big population and later introgress some traits from Kanza/Hark/Osage ?Here - 20 mi. north of KY/TN state line, ‘Osage’ is perhaps one of the eorst pecans I’ve grown.
Scabs badly, nuts are tiny, it is alternate bearing, branch structure is horrible, with tight crotches and included bark.