Ask-a-Dave's-Gardener: Perennial seed mixture, 1 by schmuttis

schmuttis wrote:
I have a big, steep hill which is covered with vinca. I have been slowly planting perennials on the hill - adding a handful each year. Because of the size of the hill not much of the perennial color is seen. This year I thought I might broadcast a perennial seed mixture to get even more plants started. I did a search online for perennial seed mixture and only came up with wild flowers. I'd like to find a mix of larger flower perennials since the small flowers aren't really seen. I was hoping someone might have a suggestion of where I might find a nice mixture of seeds. I live in zone 6 - south of Reading, PA.

Things that have grown well are hardy hibiscus, echinacea, rudbeckia, batchelor's button, gaillardia and of course vinca. I do have the hill covered with soaker hoses. It's also really hard to plant the hill since it is so steep so that's why I'm sticking to perennials.