where is my tree??

when i click GameObject->Create Other->Tree i can only see the violet-colored line and the squares!!! where is my tree?? please help me out, i want to make a landscape and i can’t do that without trees.

Really, download the ‘Terrain Assets’ here [Terrain Assets | 3D Vegetation | Unity Asset Store][1]
[1]: Terrain Assets | 3D Vegetation | Unity Asset Store
Then click on your terrain and click the little tree icon in the inspector. Edit Trees>Add Tree>(select tree)>Add. Paint them onto your landscape. There is no reason to make your own trees.

Hope this works for you.

And by the way, it’s polite to mark any correct answers as correct. Thanks.