Simon Flygare

This german nursery has it.
Not sure if they ship to Portugal though.
https://shop.baumschuleritthaler.de/winarbor.dll/WINARBOR_LIST?UID=7118323FD524DF4865E4D7778BB16704FC6F7B966009A46B&MID=784206&MAXREC=15&SUBMIT=ON&QUERYTEXT=Uttwiler+Sp%E4tlauber

There are plenty of sites selling scions throughout europe. The hard part can sometimes be to know what to search for in a language one is not familiar with, if grafting or scion wood dont translate well to the given language.


Germany
-  https://shop.baumschuleritthaler.de/   -   Large german site with old varieties, especially vintage cider and juicing apples and pears.
- https://www.ebay-kleinanzeigen.de/s-edelreiser/k0
- https://www.bienen-werk.de/shop/edelreiser/
- https://www.bund-lemgo.de/Edelreiser%20alte%20Obstsorten.html -  Old and heritage varieties

Finland
- https://www.blomqvistplantskola.com/  -  Finnish site with rare russian varieties and very cold hardy stuff

Denmark
- https://www.de-gamle-sorter.dk/  -  Danish site with loads of varieties
- http://www.blomstergaardenvedviborg.dk/frugt.htm
- https://pometet.dk/  -  Research and development orchard under the university Copenhagen that also sells scions.

Sweden
- https://www.ebeplant.se/ympris
- https://www.wexthuset.com/froer-lokar/pluggplantor-sticklingar/ympris-och-grundstammar-till-apple
- http://www.fiffigaeva.se/444293746

I ate some and saved the rest for stratifying in the fridge. It´s common for chestnuts to have 2-3 nuts in the husk, but I found it interesting that the big ones only had one. Is it the growing conditions that only allow them to make one big and fully ripened nut, or is it genetic? I think it´s difficult to root chestnuts. But the idea is to grow out some of the nuts as seedling trees and get a large span of diverse trees hopefully with a good size of nuts. The rest will be grafted with the mother tree.

Skandi Rogers wrote:

Simon Flygare wrote:
I found this lady that grows apricots in her food forest in denmark, but i´m not sure of the whereabouts of the forest.

On Samsø apparently
I may have to give apricots a go. I got figs this year in October, but that does have a south facing wall (my only one) I've added an apricot tree to the christmas list plus where to buy it.. maybe just maybe one will turn up.

Lots of danish nurseries sell them. Just google abrikos til salg, and they will pop up. I gathered chestnuts from about 10 different trees this fall. Its so interesting to see how much the genetics of non grafted trees vary. I found some very big ones that came from trees the size of very big oak trees. They was as big as the ones imported from france. A funny thing I noticed was that the small ones usually have 2-3 edible sized nuts in the husks,  where the very big ones only had 1.  

Apricots need a good amout of heat to fully ripen. But its not imposible here in denmark (at least in milder areas) to grow out in the open, without a greenhouse. I´ve heard of and seen pictures of trees that are fruiting and doing allright. I  think our rainy summers can problematic though due to fungi. Peaches grow fine too but peach leaf curl can be a problem in wet summers. I got about 20-30 peaches on my little 5 year old tree last year, that are planted out in the open.

https://www.youtube.com/watch?v=6LqpPTKnJpo&ab_channel=Inspiratoriet
I found this lady that grows apricots in her food forest in denmark, but i´m not sure of the whereabouts of the forest.

I got no long term experience with dry mediterranean climates, but i´ve been at a friends place in coastal Granada ( so might be very similar to yours) a few times and I see what works for him.

Without to much constant care
- Pomegranates do very well for him, he got several varieties from iran and neighboring central asia that are used to desert like climates and can take a bit of beating from the sun and wind.    
- mulberries. Fast growing but likes a bit of nursing in the begining
- The native dateplum (D. lotus) as Antonio mentioned
- Figs
- apricots and similar stonefruits but needs a little more care to get established
- pistachio but haven't fruited for him yet, so not sure how well its crops at his place
- various kinds of cacti including opuntia species and I think peruvian apple cactus but not sure on that one  
- He got some acacias that are very hardy and seems to do fine but he dont know what species they are
- Date palms, not fruiting yet (I would try Jubaea chilensis and some of the Butia species too)
He grows lots more but this is what I remember right now

I think fast growing (and nitrogen fixing) tree legumes like mesquite (Prosopis species) and some of the acacias should maybe work alright for you as shade and nursing plants.
See what wild and naturalised species thrives a little more south of yours in the more arid and extreme climates of north africa ex. right across the med into Morocco.
If you haven't come across Brad Lancaster yet, look up his work

Markus Padourek wrote:

Skandi Rogers wrote:

Simon Flygare wrote:Both chestnuts and almonds can crop in denmark. My grandparents got an almond (cant remember the cultivar) that usually get loads of nuts. Its up against a wall so its a bit shelted in its location, but almonds can be grown here especially if your in a milder part of the country. Sweetchestnuts are naturalized and spreeding in some places in denmark and they crop very well. The chestnuts i´ve seen around here are seedling trees so the nuts are a bit smaller but I know of people who has planted grafted varites that should produce decently in our climate. Last october I found a  huge chestnut in a park in copenhagen that produced nuts the size of those imported for eating. Black walnut can grow and produce ripe nuts here and the taste is great and totally different than the regular walnut (juglans regia). Due to black walnuts ripening here I think that some of the pecans and hickories with a more northern distribution might be alright also, but its just a theory.

Interesting that sweet chestnuts can fruit here the only one I have ever seen died about 5 years ago when we had a spell of -15 it was quite a large tree as well I know they should survive that temperature but rosemary and sage don't survive outside here either and they should as well. (I suspect it's the constant freeze thaw and damp) Interesting you found one that produced big nuts, in the UK it's very noticeable how much smaller the nuts are in the north  than they are in the south. I found a good crop in Durham but they were nearly half the size of the New Forest ones. It might be worth getting some seed from that tree. Not that I will ever be in Copenhagen.
I am up near Hanstholm so it's much cooler than copenhagen, and my only south(east) facing wall is reserved for a fig it was only planted last year so will take a while.  I found this little diagram showing the heat differences over denmark

And the link so you can see what the colours mean

That is interesting to know, I live currently on Hornsherred, so zone c, and chestnut trees grow quite fine here but yeah the nuts are quite small. I have also seen some planted on fyn quite close to the little zone b area, or possibly inside it. But not sure if those ones fruited. And I wonder, how does Mark Shepard grow chestnuts in Wisconsin, which is zone 4b? Are the summers that much warmer? I do know he has done some hybridisation work with american, europen and chinese chestnut so maybe that plays a part in it.

Other than that, we are actually going move to Arden this year to start a permaculture community (https://levefaellesskab.dk/wp/) and looking also into planting different nut trees. I have some books on the topic, but not started the research yet, so will post updates if I find out anything interesting. One nut I saw mentioned I have not heard of before, is the water caltrop/chestnut: https://en.wikipedia.org/wiki/Water_caltrop It does require water and is an annual but I wonder if it could grow here in denmark.

Hi Markus, chestnuts does indeed grow very well in Hornsherred and i´ve seen them scattered around the area. Theres an old stand (10-15 ) of chestnuts at the rosenpark in gerlev not far from Jaegerspris, that crops very well plus a huge black walnut too.

Skandi ,I dont think that -16 would be of much harm for a chestnut with some hardy genetics. I had -14 right against  my house and i got strong winds coming through my garden so it was probably mush colder than -16 and no damage too my almond and peaches and a little frost dammage on the buds of my figs. Theres some very old chestnuts 100 m from my home and even though they get some protection from being grown in a forest they are old enough too have been through some pretty harsh winters. I think that some kind of windbrake would work wonders sheltering them from the worst windchill until they are a little more robust in size

Both chestnuts and almonds can crop in denmark. My grandparents got an almond (cant remember the cultivar) that usually get loads of nuts. Its up against a wall so its a bit shelted in its location, but almonds can be grown here especially if your in a milder part of the country. Sweetchestnuts are naturalized and spreeding in some places in denmark and they crop very well. The chestnuts i´ve seen around here are seedling trees so the nuts are a bit smaller but I know of people who has planted grafted varites that should produce decently in our climate. Last october I found a  huge chestnut in a park in copenhagen that produced nuts the size of those imported for eating. Black walnut can grow and produce ripe nuts here and the taste is great and totally different than the regular walnut (juglans regia). Due to black walnuts ripening here I think that some of the pecans and hickories with a more northern distribution might be alright also, but its just a theory.

Hi peter. Sounds like a great place you have found. I never made the trip down to Bulgaria unfortunately. It was my plan all along to visit the country but then covid-19 popped up, and I couldn't travel and now I dont have the time at the moment . But thanks for your very kind offer Peter. Do you know if it usually is hard to track down the owners of abandoned properties where you are?

Hi, As Anita suggests groups for expats living or thinking about moving to spain could be a great resource. facebook.com/groups/livingoffgridspain has a lot off knowledgeable people and I often see your questions asked in the group, so there's a good chance someone can give you some sound answers too what you are seeking. There seems to be similar groups on facebook too livingoffgridspain but more specialized in the regions and communities. I personally know next to nothing about buying property in spain, but what I  have gathered from others are that spain has quite a bit of bureaucracy involved with property and it seems to vary a lot from region to region