might be worth germing them inside and potting them up and sticking them under 24hr light in side for a wk or 2 and then putting them out, i only suggest this so you can veg your plants aslong as possible before putting them out in theory you have a couple of wks til they start to flower so you could still get a decent yeild if you have some lights to put them under the bigger you can veg in this time the more you'll get mate. i got some outside in the uk aswell and i'd give it ago, lots of light mist them once, twice a wk that'll help speed them up with a foliar feed aswell but this does depend on lighting?