Growing despite layers placed in the way..

Under the gravel is a black weed suppressant but thistles, foxgloves and this little beauty manage to appear. In fact all sorts of plants come through, the foxgloves are looking good but with a fragile root system tend to blow over in a wind. They surround the Chimney pots - used as plant pots - which must give some protection, wonder how it will all look in two weeks time?