They catch lots of insects on their own and I don't suppliment.
They infrequently catch insects and I don't suppliment.
They are not able to catch insects and I don't suppliment.
I regularly put food into the pitchers.
I use liquid fertilizer sprayed onto the leaves.
I use fertilizer at the root zone (liquid or slow release).
I drench the entire plant with fertilizer.
I feed the pitchers AND use fertilizer on the leaves or roots.