Pecan trees grow best in hot climates. They can tolerate some freezes. In ideal conditions, they produce nuts in 4 years. I'm thinking in colder climates, green

Pecan trees grow best in hot climates. They can tolerate some freezes. In ideal conditions, they produce nuts in 4 years. I'm thinking in colder climates, greenhouse starting in larger containers for longer is basically required. My grandparents had 50' tall pecan trees in zone 8a that dropped about 8-10 lbs. of nuts per tree per year. I'd guess local critters walked off with a fraction small enough to not matter because cleaning up was a semi-nuisance but not as bad as cleaning up olive- and plum-like trees from sidewalks.