My experience with chamomile and tarrogon..too hot here in Central TX, and not enough humidity..The good thing is that at least bunches of manzanilla (chamomile) are pretty cheap at the grocery store.
I bet now that the nights are getting cooler you will get tomato blossoms that set. My eggplants that dropped every blossom since June are now setting..
Thanks for the insight into both the tomatoes and chamomile, sockmonkey!