I'm experimenting with the plant library (plant season is coming)
and it drives me mad

The only tree that has a reasonable hight is the "Eucalyptus, bluegum", all the others are hobbit tree's (1.5 m)
I I try to edit the "Eucalyptus, bluegum" it turns in to a small tree,

Can someone explain how this plant maker works (the help file seems from a different version),
or point me to a tutorial?