I'm surprised to hear about the day length, I've never noticed any difference in blooming, just that if I let the hanging pot waves get too stringy in late summer, they will come back with better fertilization and a little pruning. I used to get my pelleted wave seeds ( I love misty lilac and silver wave which are sometimes harder to find at nurseries than the brighter colors) from Jung. This year I got Avalanche White and Easy Wave shell pink from Swallowtail for 10 pelleted seeds for $3.49 each. Some years I luck out and they all germinate, some years I get 80%, which is acceptable.
I've got my waves up and sprouting now, but some years I have not had time to start them until I do tomatoes at the end of March. Then I end up buying some blooming plants for baskets for early season, and my home grown ones are at their prime later, when the purchased ones are getting a bit over the hill.
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Dee
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