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Purchase plants in spring or start them from seeds sown directly into the garden in the spring or fall. Seeds can also be sown in pots in early spring or fall and set outdoors in a protected location.
Check out these photos.
Pennsylvania is beautiful no matter what time of year it is, especially near the mountains and farmlands. We were driving around with my Aunt's friends who were visiting from Georgia. We stopped a lot to take pictures of the beautiful Pennsylvania countryside.
These are blooming along my property line. This was an early morning picture with the sun somewhat low for lighting. I hope you can see the bee on the right central part of the picture.
These perennials are best divided and transplanted in the fall. This page is about transplanting black-eyed Susans.