first of all, i would advise you to check out planting on your island or other islands or the greek mainland that have eucs and see what works there (am suprised that a greek island would have significant snow or frost unless at the highest elevations). what stuff grows in gardens around you? if places nearby have oleanders, myrtle, citrus, date palms, etc. than you can pretty much grow almost any euc available. many of the eucs grow very big so you will need to have a large amount of space in the first place. would not recommend drip irrigation for your euc as it tends to encourage shallow roots and blown over trees in high winds. plant a small seedling size(half meter or so) tree if possible in a wind protected area with a basin of raised earth at least a half meter around it (to hold moisture) and then "hand" water deeply at least 3 times a week the first year (best to plant in the cool seasons of late fall or early spring) and then the plant should get by with miminal irrigation. actually, my best thought to share is don't plant a euc at all; plant a bottlebrush---they are equally aussie, generally much smaller plants, and usually have much showier flowers---consider callistemon citrinus, viminea, and salignus. hope this helps, if you still want to plant eucs consider gunnii, pauciflora, leucoxylon,cinerea,nicholii,microtheca as relatively small (10-20 meters)garden trees with fair resistance to frost and wind. hope this helps.