most outdoor growers are relying on strains that finish about the start of October time. before the really bad weather sets in. come the end of the budding cycle about October time thats not possible. as the day light hours are dropping and the plants go into flower round about august time. so we not getting the full sun to finish them off when we need it most. thats why a lot of people grow autos to try and get the most out of our sunniest months. but they not as hardy are regular strains and are prone to bud rot. not trying in any way to put a dampener on your hopes of doing an outdoor grow. just saying the truth and no years the same some you might have success some you wont. you can pick up cheap plastic greenhouses with a metal frame you can put up like a tent. and take down and store away for winter when the bad weather comes in. as long as you got a good airflow running though it. and you peg it down well. you have more chance of pulling off a good grow but good air circulation is impotent come the budding months. if the weather takes a turn for the worst. but good luck my friend whatever you decide to do. even 1 oz is a bonus because it pay for the seeds you bought but if others are pulling grows off i cant see why you cant lots pack it in the first year after failure. ive grown royal purple kush great plant but that was indoors. but i think most kushes what i remember are late finishers i think about 10 or 11 weeks to flower but with so many different strains now some might be quicker and if you already bought the seeds like you say you going to force flower anyway you didn't say how you going to do this which method you going to use my buddy pulled a outdoor grow off by doing this but his plants were in 7 litre pots so were manageable to look after and not to big so he used to cover them with think black bin liners barneys farm blue cheese was the strain worked a treat but i dont think were ideal to grow outdoors in the uk but were quick finishers . if you haven't already bought the seeds try choosing another strain. more suited to outdoors and an 8 week finisher. but the best of luck to you.