Hi, Luisport, I have a Neem tree here in Tampa and my Neighbor has one too,it has stood Two years of Winter down to 32 Degrees,it is also a beautiful tree. I also have not notice anything disruptive about it, Snails won't touch it no Whiteflies on it or Red Spider Mites. I have been using Neem Oil & Neem Triple action for years and it works for me, I love the way it smells. As far as making my own oil from my seeds I DON'T THINK SO. Last year I was going to Import 1600 quarts ( 4 pallets) of Neem oil from India but I drop plans because of all of the red tape here in the States and the Tariff imposed by the Port .
Neem oil is a great natural insect repellent it disrupts it breeding sycles as far as I'm concerned, but it can not be Imported into the U.S. as a pesticide, only as a cosmetic leaf shiner.
Carlos O