philadelphiaPHS flower shOWRIVIERA HOLIDAYFEBRUARY 29 - MARCHtheflowershow.comGroup packages available!Easy to plan and groups receive discounted admission.Book today: 215.988.8839 or advtix@pennhort.org. philadelphia PHS flower shOW RIVIERA HOLIDAY FEBRUARY 29 - MARCH theflowershow.com Group packages available! Easy to plan and groups receive discounted admission. Book today: 215.988.8839 or advtix@pennhort.org.