How to get an avocado plant from seed to keep from getting brown tip?

Marianne this is the resource I use for growing my avacado from a pit. Cutting back is key. Good luck and enjoy!

https://www.apartmenttherapy.com/how-to-grow-avocado-plants-258836

See if this helps!

https://www.californiaavocado.com/avocado101/your-own-avocado-tree

Hi Marianne! Good luck to you on your project! Hopefully you can glean some helpful tips from these links! Merry Christmas to you!

https://www.flowershopnetwork.com/blog/avocado-leaves-turning-brown/

https://www.wikihow.com/Plant-an-Avocado-Tree

https://dengarden.com/gardening/An-Almost-Foolproof-Way-to-Grow-an-Avocado-from-a-Seed

I have never tried to grow a plant from an avocado seed , but I remember my mother did ! I remember seeing the glass she had it in , sitting on the counter near the window. This what she did . She took the seed and stuck 3 toothpick around the seed then set it on drinking glass ( not the tall kind ) using the toothpicks to rest on the glass, that left the seed suspended, half in , half out of the glass. Then she filled the glass with water. I am sure she added water as time went by, when level got low . After a while the seed started to root , then quite a bit later it started to sprout out of the top . When the plant got to be a few inches , maybe between 5-7 , she transplanted it , into a planter with soil , covering the whole seed at this point .