I live in Vermont and will be growing cut flowers from seed for our son's wedding. The wedding is October 1st, and most flowers are done by then .. so I am faced with a challenge I believe.

They want dahlias, zinnias, sunflowers as the main flower and I"ll be doing some fillers such as celosia, amaranth, bupleurum ..

We plan to use hoop houses to prolong the life of the flowers and to keep them safe from early fall frost. When exactly should I plant and/or start seeds? Do I start them a few weeks later than normal? Same time? ANY and ALL advice would be greatly appreciated.