Last year I planted some honesty and foxgloves in my flowerbed. They did great, i had a lovely display etc and hoped they would self seed so I'd get a few more this year. Well, the flowered is now a carpet of honesty and foxglove seedlings! What can I do to ensure some survive, leave it to nature (survival of the fittest etc) or do some thinning out etc? Total beginner here, any tips welcome!