Goldfinches and Lemon Balm Seeds

We are daily visited by a charm of goldfinches. They are so pretty, and are drawn to the garden mainly because of the lemon balm seeds. Every summer, I forget how valuable these seeds are to the goldfinches, and because these plants seed so well, I pull many of them up. I do this with great satisfaction, if only I could be mindful of the value of lemon balm seeds to the goldfinches, then I would have much more pleasure during this time of year and the birds would certainly profit more.