Where can I find rubber trees?

[pzillajesus]

Man these things are crazy hard to find. What biomes do they normally spawn in?

 

[arkangyl]

Rubber trees can spawn in any biome with trees, but they are most common in Swampland and Green Swampland biomes. I've had decent success finding them in Forest biomes as well.

 

[SilvasRuin]

Twilight Forest tends to be dense with them in its swampy areas.