Hi, I am Italian and I love Tuscany

Olive trees will look beautiful in your balcony and they are evergreen.You could also consider camellia and azaleas, other evergreen plants with beautiful flowers in spring. Also you could have a trellis on the wall with Star Jasmine...it is an evergreen with beautifully scented flowers in spring, so so nice, I can assure you the scent will blow you away!!!