Self-seeding plants.?

I have a bank which at the moment is covered in weeds . It is about 8 feet high and 30 yards long . It is north facing but the slope catches a lot of sun . I live in the Czech Republic so it is very very cold in the winter but hot in the summer . It is not a dry bank as rain runs of a tarmac yard down on to it .


I am goiing to clear it roughly of weeds tomorrow and throw some thyme seeds on it from a neighburs garden . Can anyone sugest anything that will self seed and fill the bank with some colour . Also the name of an on-line seed catulogue which will send from the UK to Europe.


Thank you to averyone that helps.

Self-seeding plants.?
I live in the Midwest US (next to Lake Michigan) and even though it's 90* now, our winters will get quite cold here; so I'm sure that several of these plants should grow for you also:





Some of the best self-seeders are: Cosmos sulphureus (bright orange blooms), Malva moschata (musk mallow, comes in pink and white varieties), and Mirabilis jalapa (four-o'clocks, usually in mixed pastel colors).





The malva (a hollyhock relative) is a perennial, but also a strong self-seeder. The Cosmos and Four-o'clocks are both annuals that produce a lot of seed from each plant.





One of the best seed catalogs is from Thompson-Morgan, located in the UK. Their website has info on world-wide shipping ... check it out at www.thompson-morgan.com
Reply:Some of the ones that have been reseeding themselves in my garden are Cosmos, Sweet William, Pansies, hollyhock (they get very tall), cleome, moon flower (datura-very toxic). Have fun!
Reply:Most varities of yarrow (milfoil, achilleas) will spread quickly. They don't self-seed, but spread by underground runners. If it gets overgrown, you can just go out and pull out as much as you need. It will fill in the next year or two.
Reply:black eyed susans reseed not sure if you can grow them where you are though
Reply:snapdragons.. and they like some cool weather


bulbs like crocus and tulips come back every year and they like cold weather


snowdrops are bulbs and come back


irises come back


lily of the valley can be prolific and they come back


daylilies( i live on a river and they grow all on the banks and slopes)