Flower Barn is a flower shop that appears in the Panini comic, The Need for Speed!.
Thinking that during a video message from April O'Neil she has said she loves him, Donatello immediately calls the Flower Barn and orders a bouquet of flowers to be delivered to her. He includes a card with a message professing his love as well.
He just catches the last delivery of the day and is ecstatic. Just as Don is about to gloat to his brothers, he receives another video message from April explaining that the first was cut off before she could finish saying that "I Love You Like A Blister" was the best album by a band they both like. Panicked, Don rushes from the lair in the hopes of catching the delivery truck before it reaches April. Fortunately, he has the help of his brothers and between them, the Turtles manage to save Don from an embarrassing mistake.