Flower Shops in lower Sukhumvit area?

Sukhumvit or Phloen Chit, Chit lom, etc. I'm looking online and there are several but they all seem to be for delivery only. I'm looking for one I can walk into and buy flowers, a single flower, etc. for my GF. I remember there used to be one in The Ambassador Hotel on Soi 11 years ago but it doesn't look like it's there any longer. Any suggestions? BTW I'm not talking about cannabis, those are everywhere :)