Posted: 18/01/2014 at 20:03
I'm happy to be wrong but they look very similar to the poppies which grow in my garden, I read somewhere, the seeds can lay dormant in the soil for 10yrs or more, waiting for the right conditions to grow again and I can believe that.
Don't want to be the bringer of bad news but if they are the one's in my garden I've been trying to get rid for over 20yrs. If you let the flowers go to seed they explode everywhere.
On a more positive note they reproduce by self seeding, so as long as you don't let the flowers go to seed eventually the numbers will reduce and emerging seedlings can either be hoed into your soil on the veg beds or pulled out.