The Tropical Fruit Forum

Hi All, Does anyone who is growing white sapote trees happen to know what causes white sapote tree leaves to twist almost like mango leaves do it is deficient in a nutrient? The sapote tree is growing in a large clay container with good drainage in sunny spot. Not all leaves are twisting; for the most part they look green and healthy. The tree is seedling grown since 2015 and is now about 10 feet tall. I have read that it loses its leaves in June, but that is a few months from now. This is my my first post and i am not sure if this is the correct forum for my question, so please bear with me as i am in learning stage! If there is no cause for concern, i am hoping for reassurance that maybe it is just the cold at this time? Thank you All!