The Pumpkin Patch by Ickle Pickle
A pumpkin print hanky is shown both sides, and the corners gathered together. The magician reaches inside and retrieves some pumpkin seeds that have magically manifested within. He then shows the hank again, and re-draws the corners together. He proceeds to "plant" the seeds back into the hank where they vanish "into the soil". The whole thing is repeated and a pumpkin is pulled from the hank!