Dill is good but it can get fussy in the vase and droop, so cut some put it in a vase and see how long it lasts indoors. Those are great sunflower choices. Buperleum is supper easy and florists already buy it from suppliers.
I remember my local florist put in some Solidago she had brought in from a supplier, it grows wild here, a customer phoned her and made her come and take out the ‘ditch weed’ in his bouquet, he was upset so watch your choices and know the customer. Some don’t mind, others are offended when they see something they think you got for free in their arrangements.