You can grow pear trees in areas that receive at least 175 days of frost-free weather. They need a cold winter, but other than that, they are very easy trees to grow. They are deep rooted and can withstand temporary low rainfall amounts. Before planting one in your yard, make sure that you have enough room for a 40 to 50 foot tall tree to stand in full sunlight. While you should normally plant pear trees in the spring, you can plant them in the summer if you give them special handling.
Water the tree thoroughly until the soil is saturated. If the root ball is small enough, set it in a bucket filled with water. Keep it in the shade and out of the wind until you have prepared a hole to plant it in.
Dig your hole where there will be at least 15 feet in every direction from other trees, buildings, or bodies of water. It may need to be farther from larger trees that could shade it during the day. Make the hole as deep as the root ball is large and a few inches wider so the roots have softer soil to spread out into when they start growing again. If your tree is root-bound from having outgrown its container, make the hole about a foot wider than the root ball.
Take your pear tree out of its container when the heat of the day has passed and the sun is setting or has set. Loosen the roots and let them spread out if they were circling the bottom of the container. Keep as much soil around the root mass, unless it is really compacted from outgrowing its container. In this case, you will want to rough up the roots gently to loosen them from the mass.
Set the tree into its new hole and drop soil in around it, tamping the soil in around the roots as you go. Fill the hole in completely, making sure the tree is standing up straight the whole time. Form a ring of soil twelve inches out from the trunk to hold water close to the tree.
Water the tree with several gallons of water immediately after planting. In the morning, if the sun is extremely bright and hot, your tree may need to be shaded with a light tarp or shade cloth. Water every day for the first week and then every few days until you see new growth appear.