I'm a novice when it comes to gardening--sort of a learn as I go gardener. Two years ago, we bought a house that had been owned by a landscape architect and there is an extensive perennial garden--15 perennial beds (mostly raised beds) and one bed reserved for annuals and vegetables. I'd like to add some more perennial flowers--I'm thinking poppies, columbine, pinks, bee balm, maybe some foxglove. In the past, when I've added new plants, they haven't done well. The Bee Balm I planted last year died. There is a lot of mint that's starting to take over. Some Oriental Poppies that came up our first year here didn't come up this spring. My clematis didn't flower at all last summer--I don't have a clue why. One of my peonies didn't make any flowers either. So, what's the best way to add the flowers I want--start them from seed inside, sow directly into the garden, or buy plants? Last spring, I bought lots of plants at my farmer's market, but they got choked out by the already established plants which were already much taller than the new plants and blocked the sun from getting to the new ones. And why are some of my established plants no longer producing flowers? Any advice would be appreciated. I feel like this garden still belongs to my house's previous owner. I'd like to make it mine.