I started growing grapefruit and tangerines from seeds earlier this year. Most of the trees are about 3 foot tall. All of the sudden the top leaves are turning curly. The trees are still growing but as soon as the leaves get a certain size they start curling but do not die. I am pretty sure I have some kind of deficiency but I do not know enough about them to know what it is. I have been feeding them on a regular basis (about every 3 months). If anyone knows what I need to do, please let me know. Thank you.
