"The people that didn't receive their deliveries was a small number, some people were upset which was fair enough.
"Anybody who didn't want their order was given a refund."
But for some people it was not good enough because several buyers took to the florist's Facebook page to express their unhappiness.
"Can you let me know what's going on. Flowers booked and paid for well in advance. No flowers delivered, no emails answered, no one answering the phone. It's not looking good," Mark Kessner said.
Jason Kwok and Fong Feng said they were also yet to have their orders delivered in the afternoon.
There were lessons to be learned from the day and there would be a review made as "a team" to prevent a repeat of the slip-ups in future, Piper said.
Since the store opened two years ago, Valentine's Day and Mother's Day have been its busiest days.
At peak rush hour the store pulled out all the stops, using 12 drivers, Ubers and family members.
"We hope our customers are able to forgive us," Piper said.
Staff members had finished preparing at 1am on Wednesday and arrived back for work at 6am.