The two teams were tied at 17 heading into halftime.
Sickles (Tampa, Fla.) took the lead indefinitely on a field goal in the fourth quarter.
The Gryphons came into the game allowing 10.2 points per game. Plant's 17 points were well below its season average of 39.2 per game.
The defeat comes as a step back for Plant, who notched a 47-14 victory over Riverview in its previous outing.
This story is based on information MaxPreps obtained from Qwixcore reports. Qwixcore, MaxPreps new live-scoring tool, allows fans to serve other fans by reporting live scores of games from their phones. Occasionally, errors may occur and are usually a result of incorrect data input. For more information on Qwixcore, or to find out how you can Qwixcore your game, please click here.