With supply disruptions pushing up the cost of importing blooms, florists say they are doing what they can to balance costs, competition and demand.  SINGAPORE: With less than a week to go before Mother’s Day, some florists say they are grappling with falling sales and rising costs during what is typically one of their busiest periods of the year.  Industry players say supply disruptions linked to the Middle East conflict have pushed up the cost of importing flowers, while increased competition