the farmer market lady in hawaii told my sis that it's so easy to sprout. You just plant it into the ground and it will grow. One thing you need to do is protect it from the chickens as hawaii has lots of free roaming chickens that will dig and destroy your planting. I have 3 chickens and they destroy everything unless you protect the plants. I started the seed in my bedroom windown in the winter. day temp was 65F in the house. Night time, I turn on heater in my bedroom as it can get then to 40F. It's till not too late to start one as I think it's rewarding to just have a durian tree on your property. My sister did throw the seeds into her yard the same time she gave me hers, all from the same durian she bought. Nothing grew since she was not there to take care of it.