Bouquet stage is observed during

The bouquet stage is observed during Leptotene.
During the leptotene stage, those duplicated chromosomes each consisting of two sister chromatids condense from diffuse chromatin into long, thin strands that are more visible within the nucleoplasm.
During this stage, the chromosomes attach themselves by their ends to the inner membrane of the nuclear envelope. At the transition to the zygotene stage, the telomeres usually aggregate at a nuclear envelope sector, thereby forming a meiotic bouquet.