That was a joke. Let me tell you the reason why it is funny...
How do you fix a broken jack-o'-lantern?
How do you fix a broken jack-o'-lantern? With a pumpkin patch.
This is a pun. The humor lies in the fact that a pumpkin patch is a place where you grow pumpkins as well as an imaginary tool that you use to fix a broken jack-o'-lantern. A tire patch would be a tool used to patch a tire when it has a hole, so hearing the words pumpkin patch might conjure images of a similar device to patch a pumpkin.