Seagrass restoration is increasingly highlighted as a way to respond to global seagrass decline. However, seagrass restoration success is highly variable and low performance appears frequent. Despite this, published information on the factors causing project success and failure is sparse, both within peer-reviewed and grey literature. Acknowledging and sharing failures is crucial for conservation and restoration, yet such information largely remains as expert knowledge with individuals conducting restoration activities. This study seeks to explore how individuals associated with seagrass restoration learn from failure, identify drivers of project success and failure, and highlight lessons learned. Social surveys, in the form of key informant interviews were used to explore experiences from seagrass restoration researchers and practitioners across the globe. Surveys were used to elicit information on projects which have, in particular, not met with the intended goals, or where information remains unpublished. This research reveals how learning from setbacks and successes can inform future restoration and serves as a critical step in bringing information on failures to the forefront of seagrass restoration practice. By initiating conversations about failure in seagrass restoration, we demonstrate how learning from other disciplines can further future restoration endeavours.