i never fert any recent transplant.. they need time to settle in.. before such ...

and i would never fert in late fall or winter ...

and i would not fert as the sun is in decline ... as a plant going into the slow period of winter should not need a wake me up of fert ...

and i have never gardened in ... where are you .... a place where avacado is grown outdoors ... so i will defer ...

but my gut tells me to wait until your version of late winter ... when the tree is going from rest to active growth.. to start a fert regimen ... by which time it will be settled in ... full circle.. there ya go ...

ken

SeanPez, I note you are a new member, welcome. It would help if you edit your post information so we know where you garden. If you are in California, you have planted your tree in the ground at the right time to take advantage of the rainy season to establish your tree in the native soil. I would hold off on the fertilizer until late winter/early spring. With the exception of citrus and avocado, I do not use synthetic fertilizer, only compost. For citrus and avocado I use Lily Miller as per directions, as it contains the minor nutrients essential for good health. Avocado are shallow rooted and benefit from regular additions of mulch, keeping it an inch or two clear of the trunk. Al

If you are in California, I wouldn't add fertilizer until around March. I have a huge tree in the backyard and it produces a lot of fruit every year. Water seems to be more critical than anything else I can't say we have added fertilizer in years.. The size and quantity is affected by watering. Southern California is very arid, almost desert and we seem to forget that, so I be more concerned about the watering.