Commented: Is it too late to grow summer veggies from seed?Do you still have ~80 days before your first fall frost? If so, then why not plant seeds? Simple mathematics, friends.
If you're still concerned, buy plants as backups.
Commented: Herbicide damage?No, I know, I didn't mean to come across as shunning you or talking down on you. It's a shame that stuff is even legal for sale, is all. Stay healthy and good luck with your tomatoes! :)
Commented: Heirloom transplant is all flowers on topIf its your only one, and you think it's stressed because of the erratic flowering, why not leave it, and try to get fruit set for some seeds for next year? And if you want some this year to enjoy, ge...