Planting time for apricot seeds from pits is signaled once you see some roots emerge. Pot the sprouting seeds. Put one seed per 4-inch pot filled with potting soil with the root end down. Keep the growing apricots from seed in a sunny window, under grow lights or in a greenhouse until they get bigger and it is time to transplant them out into the garden. With luck and patience, you will be rewarded with sweet, juicy apricots from your own tree in three to five years.
Read more at Gardening Know How: Apricot Seed Planting – How To Start An Apricot Tree From A Pit http://www.gardeningknowhow.com/edible/fruits/apricots/growing-an-apricot-from-a-pit.htm