UK outdoor: when to plant seeds?/nute question [photoperiod]

Hi all,

I am new to outdoor growing can any UK growers give advice on when to plant seeds?

also, when I am feeding how much water should I dilute the nutes in EG: I could use a pint of water or if I used two pints it would be double the nutes also to achive the right concentration of nutes..

Thankyou in advance

Ok, I have just started to germ 3 bagseeds, I will get a load of auto AK and Afghan Kush going bit later in the season, going for a couple photoperiod heavy indicas as they will finish by me, I would love to grow Bubba Kush