Choose seeds. It is unlikely that you will be able to purchase pear tree seeds from a nursery or gardening supply company, so your seeds will have to come directly from the fruit itself. If you have a local orchard or farmer's market you will have better luck with the seeds from these fruits. If you must use grocery store pears buy several different types to increase your luck. Remember that grocery store produce is shipped in from all over the country, and a pear that grew in California may not grow in Louisiana.
Stratify seeds. Pear tree seeds must undergo a process called stratification, which means that they must be chilled at 35-40 degrees for 3-4 months. Begin stratifying your seeds about 3 months prior to the expected date of the last frost in your area.
To stratify the seeds, place them in a plastic zipper bag or plastic container with moist material. Peat moss works best, but you can also try potting soil or sand. Close the bag or place a lid on the plastic container and refrigerate until the last frost.
Move seeds to seedling greenhouse. These "greenhouses" are plastic trays with clear plastic lids and can be found at any home improvement or gardening store. Plant the seeds in this box and place it in a sunny window. It is here that your seeds will germinate.
Transfer seedling to a pot. Once the seedling has germinated transfer it to a pot and keep it indoors for several months. It is best to keep it inside throughout the first winter. Give your seedling plenty of light and water, and transfer to larger pots when needed.
Transfer seedling outdoors. Choose a spot in your yard that receives full sun and has plenty of room for the roots to spread. Remember that a pear tree grown from a seed is going to be larger than those grown from nursery graftings.