When running Phiarlan Carnvial this evening, I was putting Spring's Resurgence on NPCs to help guard them. However, I couldn't tell if triggering it on my druid or helpers (summons, wolf companion) healed the NPCs, if Spring's resurgence triggered directly on the NPCs themselves, or if neither of those events occurred.
All the NPCs lived, which is good, but it would be nice to know if Spring's Resurgence affects NPCs you're trying to protect, either by directly triggering as their hit points fall, or because it gets trigged on a PC party member and/or hireling summons.