Describe your suggestion.
When a dusktrap plant kills a mob, it has a chance to place another dusk trap in a 3x3 area around it.

Additional context
Bone meal wouldn't make sense since dusktraps are apparently carnivores. This seems like a more fun way to farm dusktraps than adding a seed.

Limiting spread to a 3x3 area would make it easy to block spawns for a mob grinder or trap.

pinning this and closing for future use

hmm thats actually a cool idea, i might tinker with that to see if it works or not