Outdoor Growing in Cold clima

Hey mate! What about covering them with plastic, kind of a little greenhouse (considering the plants are small what they probably are if you are starting your outdoor grow, and if you have space for that) that quickly makes a few degrees of difference and they wont get icy winds or frost.. im sure they will like that, and during the day you will probably have around 20 degrees celsius if the outside temperature is 15 degrees

5c is fine. Mine will be outdoors full time at those temps. Will just slow the growth down a bit is all. I have no issue with that. In the end it will be over 12ft tall.

Anything below 10° Celsius is critical for your plants, especially in the early stages of growth. I'm waiting with my projects until the Ice Saints. That's around mid-May. Then the temperatures here (Germany) are stable and night frost is no longer to be expected.