Zone pushing - 7a - north Poland - coastal area (+/- 15km to sea) near Koszalin

[Janpol]

Hi everyone,
Like in the title of this topic - i want to push my hardiness zone and plant sth special that will provide tasty, high quality crop/food. I have on my property 3 places that can have high pottential to do that with really good microclimat.
Here are the photos of those :






First is probably the most protected and warm. It's small piece of land inside the household ambulatory/curtilage/cloister - I mean enclosed area made with all buildings around house besides small vehicle entrance which is "hole". As you can see from the north - sea - there is barn, from the West is byre and house and from the East is wood shed. The vehicle entrance is from the south- land mass- and also it's south exposition so there is plenty of sun. So far there is some old grape vine that doing very well.

Second is the lake. I guess there is some microclimats here bc of the water. There is some hedges/bushes from south, East and West, only from north (where photo Was taken) there is no bushes but in some distance - buildings. Maybe on the edges down to the center of that lake there is possibility for sth exotic?

And The third is south exposition Wall of utility room that belongs to that enclosed area in the First photo. Also plenty of sun. North is of course protected bc of that Wall, south no, west is house and east nothing but in some distance (not far away) there is willow Forest Wall.

So i'm curious what can be actually grown in those three places? Let Me know guys what do you think and your propositions for the most even extremely exotic plants that could doing well there. I Was thinking about some citrus, olive, acca,  loquat or even ... mexicola avocado.
Ps. I have in plan fig tree, persimmon and asimina in different places for sure so i'm not including them here.

[Tropicaltoba]

Not sure if it’s too cold for feijoa. If the buildings walls are south facing and they are heated they will probably allow for some zone pushing provided it’s not too windy and exposed. There are lots of gardens in England that espalier their fruit trees along old south facing stone/brick walls. If you look up old episodes of gardeners world on dailymotion you may find some examples of temperate fruits. I’m not sure if people have tried these techniques for subtropicals.

[drymifolia]

mexicola avocado

Unless you are building a greenhouse or your microclimate can give you more than a full zone of extra warmth (seems unlikely), this seems impossible to me. Avocados cannot stand to have the topsoil freeze solid, for one. I assume your soil freezes every winter? I'm in a cold 8b/9a here and avocados are mostly killed every winter, I would never even try them in 8a, let alone 7a.

[bussone]

Hi everyone,
Like in the title of this topic - i want to push my hardiness zone and plant sth special that will provide tasty, high quality crop/food. I have on my property 3 places that can have high pottential to do that with really good microclimat.
...
So i'm curious what can be actually grown in those three places? Let Me know guys what do you think and your propositions for the most even extremely exotic plants that could doing well there. I Was thinking about some citrus, olive, acca,  loquat or even ... mexicola avocado.
Ps. I have in plan fig tree, persimmon and asimina in different places for sure so i'm not including them here.

So, something to consider.

Your climate is roughly similar to that of Seattle or Vancouver, except with a bit less rain. Despite citrus being able to handle the winter there (palm trees can survive) without much problem, it does struggle with the lack of heat and sun in the summers there. It's not that the winters are too cold, it's that the *summers* are too cold. Even poncirus struggles there. Could be a problem for citrus, unless you espalier or something like that to increase summer warmth some.