hard to tell without a picture.

lychee is very susceptible to fertilizer burn and wind damage.

ill post a picture soon, basically i have been using the fish 5-1-1 fertilizer, and the canopy is the part that has the post wind damage, basically brown tip leafs

brown tips are definitely fertilizer burn, lychees have delicate leaves
stop fertilizing all together until the roots are well established.
i dont fertilize any of my fruit trees for the first year.

when the tree gets larger and starts bearing you have to follow a growth dormancy cycle like described in the link below in Table 2

Here is a link that might be useful: http://edis.ifas.ufl.edu/pi050

Also on a side note...I've heard that many places in CA have very hard water, besides fertilizer burn, hard water might also be contributing to your brown tips. If you can find a way to use rain water(rain barrel) it would help. You can post this question in the tropical fruits forum as there are several members from CA that grow lychees who could confirm or deny the hard water theory? Good luck!

ive only used 5-1-1 fish fertilizer... i think wind damage is to blame, because the canopy shows the most brown leafs, is it best to relocate the plant, even though i planted it 2 months ago?

kobe, if it were mine I would just build a small shelter for the tree instead of stressing the tree more and disturbing the roots. Since its a small tree it shouldn't be hard to make a makeshift "wind shelter". I did this for my lychee trees and kept it there for a little over two years and it made such a difference(until the freeze killed it)...especially on the new growths since they are very tender and sensitive to wind over 15mph.

You can use just about anything to build it...PVC, wood posts, fencing. You can use shade cloth, burlap.

Check out the picture below...Hope it helps.

Here is a link that might be useful: