What to grow in Portugal? Advice please

I have a small plot in Portugal (Castelo Branco) that I would like to plant with edible plants. However, I have little knowledge of growing in that climate and I will not be there year round. So, I am looking for suggestions for low maintenance plants suitable to that climate. There are the obvious ones I see growing there already e.g. grape, olive, fig, citrus. I was thinking about maybe peach, strawberries and passionfruit plant? Does anyone know if this would work or have other suggestions please?

Winter Zone 9
Summer AHS Zone 8
Rain: 31inch/year (Sept-Jan =20, Feb-May=10, Jun-Aug=1.5)


Apple Trees(Anna, Dorsett Golden, Fuji, Pettingill, Winter Banana, Beverly Hills)
Apricot Trees (Royal, Blenheim)
Avocado Trees (Hass, Fuerte)
Berries (Blackberries, Raspberries)
Blueberries: O'Neal and Sunshine
Mulberries (Black Persian, Oscar, Pakistan, White Pakistan and Weeping Teas)
Atemoya (African Pride)
Cherimoya (Dr. White)
Citrus Trees
Fig Trees
Guava Tree (Arrian, Bangkok, Giant Vietnamese, Hawaiian)
Jaboticaba
Java Plum
Jujube Tree
Kaffir Plum Tree
Coffee (Red Oxacan)
Louquot Tree
Lychee
Mango (Manila, Adaulfo & Elefant, Corriente)
Macademia Trees
Nectarines (Golden, EZ Pick Snow)
Mexican Papaya Tree
Palm Trees (Dates, JellyPalm)
Passion Fruit
Peach Trees ( Babcock, Saturn, Donut, Desert Gold, Santa Barbara, Earligrande)
Asian Pear Trees (Shinko, 20th Century, Shinseiki)
Asian Persimmon Trees
Plum Trees (Beauty, Inco, Green Gage,Santa Rosa)
Pomegranate Trees
Sapote Trees

Check on the link and let me know what you think
http://tropicalfruittrees.com/Bamboo.htm

Prickly pears! Let me know if you need a few pads to get you started.

I think what you grow will depend a lot on what time of year you'll be there.  A lot of things will need irrigation over the summer, but that's not likely to be possible unless you are there to do it.

Looking at the USDA zones, you should be able to grow pretty much anything that grow in the Temperate/Sub Tropics. It really depends on the soil type/s, availability of water, and aspect (orientation to the sun, prevailing winds).

Thanks for the ideas. I’ve not even heard of some of those so i’ve got some reading to do. I’ll be there at a different time each year so they pretty much have to be self sufficient with a bit of pruning, mulching occasionally.

Laura, im too in Castelo Branco área and generalizing, as i dont know anything about your place, forget subtropical plantas.
The ones you said, again generalizing, grape vines, olives, figs, are the best chance you have. Even more so if you'll Be away for long períods of time.