I'm familiar with your growing conditions as I am on continental Europe, my weather conditions are much more favourable than yours though, not sure about the Church strain, I believe that is an indoor variety if I'm not mistaken, almost all indoor strain may be planted outdoors but results vary, Great White Shark is hardy but may not finish in time, last year I grew Sharksbreath (GWS x Lambsbread) outdoors and had to harvest two weeks early 26 Oct, this year I'm going with early maturing outdoor strains, Early Skunk and Guerillas Gusto from Sensi, I see most guys in Ireland do greenhouse grows, you need something mould resistant, Northern Lights perhaps or Early Misty, indica dominant for sure, there are some other Irish growers on here, they ma be able to give you a hand.... Cheers!