The polyhedral crystals formed after 4 h develop petals that are transformed into multidomain complex morphologies with straight facets (i.e., double-decker flowers after 6 h). At a later stage, they mature into larger, more complex curved crystals (i.e., curved petals after 48 h). This morphological evolution is accompanied by the progressive addition of facets on the petals. The final curved profiles may be approximated as a set of short, consecutive, and progressively more inclined planes. Our analysis did not reveal any indication of amorphous phases or multiple crystallites; all the growth stages involve isomorphous structures. We correlated the morphology, solvent interfaces, and the crystal structure. In particular, the facets defining both the early-stage hexagon and the petal profile were visualized at the molecular level. Higher order Miller indices, not matching the basal planes of the hexagonal unit cells, could be observed in all the analyzed structures. Although the labelling hkl values look different, all the lateral facets can be traced back to three types of molecular profiles having different composition and interfacial area. We observed a general tendency of the system to move from less dense (facets that cut the channels) to denser planes (facets that expose straighter molecular array) while moving from the center of the flower out towards the outer petal. We hypothesized that denser planes correspond to a reduction of the solvent-crystal interfacial tension and that the attachment of further material to growing facets is energetically easier on a more densely filled face. The low supersaturation conditions and the progressive decrease in the building block availability as a function of time may account for the overall growth progression in this complex porous system.