go for the early growth spurt skunk/ sativa hybrids, plants that cover themselves with little buds allover the branches early on
if they are smokeable and pretty tight by 6 weeks indoors they will do ok outdoor by november
plants that develop indoor later or pack on much of the weight/flower growth at the end, even if they are 8-9 week strains they don't
do so well outdoor in the uk, they will still make good resin for hash, but the flower development will be shit for most of them
very leafy with tiny buds
its hard to get any of them finished outdoor unless you force flower them in summer
and keep them covered or autoflower
i found the best results was not to aim for plants that have a short flower time
but to go for plants that start quickly and pack on resin early
i test a few of my indoor plants outdoor most summers rather than going for outdoor types
most plants outdoor in the uk will not build proper colas they will be very leafy with little bud/calyx mass
i found it more productive to grow plants that make lots of smaller individual buds that spread over the surface area of the plant which is exposed to more light , rather than plants that make a few fat colas
peace