Giant pine cones are rare; most cones fall in the small to medium categories. Giant pine cones are between 10 and 12 inches long, with some growing even bigger than that. The Coulter Pine and the Sugar Pine grow giant pine cones. Extreme cold and heat help the pine cones to grow to the giant proportions, so they only get that large in certain areas of the country. Getting a pine cone to open requires heat, and you can do it at home in the oven.
Turn the oven to 93.3 degrees Celsius.
Place a piece of waxed paper on a baking tray.
Put the pine cones in a single layer on the waxed paper.
Put the pine cones in the oven. Check them every five to 10 minutes to see if they are open.
Take the baking tray out of the oven when the pine cones are open. Allow them to cool before touching them.
Putting the pine cones in the oven will also kill any bugs that may be living inside them.
Use pot holders to pull the baking tray out of the oven, as it will be hot. Do not turn the oven temperature higher than 93.3 degrees C, or you run the risk of burning the pine cones.