Dig one hole for each heritage pear tomato plant, making the hole twice as wide and four times deep as the root ball. Space plants 15 to 24 inches apart in all directions.
Remove the pear tomato from its package and place one plant in each hole so the roots spread against the soil and the lower two-thirds of the plant is below ground.
Insert a tomato stake behind each plant, close enough so you can tie the pear tomato to it but not so close that the stake interrupts the roots system. If you prefer, insert a tomato cage over the plant.
Hold the plant vertically straight and push soil into the hole to complete planting.
Water the ground to saturate the soil after planting.
Fertilize the newly transplanted pear tomatoes using a water-soluble, balanced fertilized, such as 10-10-10. Mix the fertilizer with water, then pour it over the plants. Use the right dose range for your size garden bed.
Tie the pear tomato plants to the stakes using string.
Water the plants when the soil feels almost dry, saturating the soil. In very hot weather soil can dry out daily.
Fertilize the tomatoes using 10-10-10 fertilizer to promote growth, again mixing the fertilizer with water and pouring it over the plants.
Harvest tomatoes as they ripen by plucking them from the vine. Yellow pear tomatoes take 70 days to mature on average, for example. Use color and softness as an indication of ripeness.