which plants cant be made decorative by me ?

[Figger]

could you list which plants cant be turned decorative by me and which ones change color when turned decorative.
 Looks like the cypress tree cant be turned decorative. 
The rare plant i had on steps disappeared again.
I left house to another facet and when i came back, the rare plant was back

[alk760]

Bonzai!!!!!

[Figger]

i never grow bonzais, i have never like them. I wish the hedges produced seeds. I've never seen hedges or trees you could grow before.

[alk760]

You should check the Florest Shop in Cove

[Figger]

Hops plant cant be made decorative either.