The cherimoya tree (Annona cherimola) is a fruit producing tree that is believed to be native to Colombia, Ecuador and Bolivia, according to Purdue University. In the United States the trees can only be grown outdoors in California, Hawaii and Florida. In other locations the cherimoya can be grown indoors in a pot. The tree grows well from seeds, although the fruit from seed-grown trees is not as large as with other propagation methods.
Fill half of a large bowl with water and place cherimoya seeds into it. Press the seeds down until they are all wet. Set the bowl aside and let it rest for four days.
Look at the bowl of water and scoop out any floating cherimoya seeds with your hand. Discard these seeds since they are not viable. Scoop out the remaining seeds on the bottom of the bowl and set them on a paper towel before discarding the water.
Fill the plant pots with a mixture of one part peat and one part course sand. Mix the two well, until they are combined. Each pot should be at least three-fourths full with the soil mixture.
Place one cherimoya seed into the centre of each pot and cover them with 1 inch of the soil mixture.
Water the pots until the soil is wet all the way to the bottom.
Set the pots in an indoor location that maintains a temperature of between 18.0 and 25.0 degrees Celsius. Water the pots as needed to keep the soil from drying out. The cherimoya seeds will germinate in approximately three to five weeks.
Wait until the seedlings reach 3 inches tall and transplant them into new pots that are at least 18 inches deep.
You can plant the cherimoya trees outdoors when they reach between 1 and 2 years old.