nattybear
What are you trying to grow that you thought would be fruiting by now? Even in balmy Southern CA, it IS winter, after all!
Pumpkin puree is unlikely to harm your plants but equally unlikely to help until it's composted. It's people food. Plants need nutrients in different forms, but not until you know IF they need feeding in the first place.
Tell us more about what you're growing and how and where and maybe we can offer specific advice. Happy to hear from new gardeners. Hope you also made a yummy pumpkin pie!