Regulates positively flowering by repressing FLC expression and post-transcriptional modification. Interacts with HOS1 (PubMed:22960247). Interacts with HUA1 and HEN4 (PubMed:25658099). Delayed flowering without a significant effect on the photoperiodic or vernalization responses (PubMed:14593172). The late-flowering phenotype in flk-2 is rescued by the disruption of PEP (pep-2, pep-4) (PubMed:19576878).