Have you tried to grow avocado from seed that you bought to eat? And it never grew. I was in the same boat. This time I planted in summer in a pot and forgot abt it. It took forever but finally it did come up. It takes more than a month for it to sprout and then to see some green leaves seems to take few months. I was gonna use pot for something else when nothing appeared but then I dug seed and saw it had sprouted so I buried it again. And it did grow.
If you like to have house plants, then this will cost nothing . And it’s fun experiment.
So keep patience and forget abt it after planting. Also try in Summer , Spring and keep planting all avocado seeds after eating .