PC Questions about what walls allow plants to grow

[Nomad000]

I've been wanting to use some themed backrounds for my plant farm becuase I've splitted up the different kinds of plant blocks you can get jungle/corruption/hallow/etc into seperate rooms. Can anyone list what walls can be used for planting? Or do all walls allow plants to grow?

 

[Sigma90]

What kind of plants are you referring to?

To the best of my knowledge:

• Grass can grow in front of any wall
• Herb plants can grow in front of any wall
• Trees and weeds can only grow in front of Iron/Lead Fences