Drawing 2D objects in Isometric map?

How do I put the 2D tree in Isometric map so it’s doesn’t get projected like the ground tiles?

The ground is fine, but trying to draw tree from the tileset http://opengameart.org/content/grassland-tileset
results in this

See this topic:

http://discourse.mapeditor.org/t/creating-an-isometric-map-images-bigger-than-tile/1862

Hmm I’m just wondering how the guy under tileset comments did this, probably used the same way as described by OP in the linked topic? http://eyeocr.sourceforge.net/filestore/filestore.php?cmd=serve&file=blob_1006855&contentType=image/png

I’m using Phaser by the way, have to check if the isometric plugin works with Tiled json maps, because standard 2D (non Iso) maps are fine. Still kind of new to Tiled.