I use attitude seeds a google search will find them. Or pickandmixseeds are good aswell.
They deliver in plain packages and signed for is a delivery option. Attitude also offer stealth delivery where they package in either a wallet or a t shirt.
Both offer single seeds for most strains.
My advice for now is read read and more reading. Find out all you need about position, soil, nutrients,germination, pots etc.... Then get your sites preped during the winter.
You need to be looking for places NO ONE and I mean NO ONE goes to. Remember your looking at having plants there for a minimum of 4 months but more likely 6. Check your sites, spend time there. If they are easy to get to for you, then other people go there too and that's no good. Google maps is idea for a first scope then visit them during the day and night.
Peace
Wow didnt know for that long, thanks man so attitude seeds have both those options (signed for and normal), I plan on just planting the seeds in the earth after germination, seriously Ill check the park, wouldnt autoflowers be better for gurilla growing? I would prefer not to grow autoflowers because they have less THC and yield less but they grow in a fraction of the time, what would you reccomend? Also how often would I have to water my plants? Thanks