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Flowerlike hierarchical SAPO-5 molecular sieve with affluent mesopores derived from loosely aggregating of primary nano-rods-like crystals is prepared via a hydrothermally rota-crystallization route using tetrapropylammonium hydroxide as a single structure-directing agent. • Flowerlike SAPO-5 molecular sieve is synthesized by a hydrothermally rota-crystallization route. • Flowerlike SAPO-5 is composed of loosely aggregating rod-like crystals with a size of ~20 nm. • Mesopore of 2–8 nm resulted from the intercrystalline spaces is fabricated. Flowerlike hierarchical SAPO-5 molecular sieve was fabricated by a hydrothermally dynamic crystallization route using tetrapropyl-ammoniuhydroxide as a single structure-directing agent. The hierarchical SAPO-5 reveals high crystallinity, and large external surface areas validated by the XRD and N 2 adsorption-desorption. SEM and TEM indicate that the flowerlike hierarchical SAPO-5 is composed of loosely stacked primary nanorods with average diameter of 20 nm. FT-IR and EDS analyses show that as increasing crystallization time, more and more Si species are incorporated into the AFI crystals. Moreover, it is found that a dynamic crystallization condition is very mandatory toward the synthesis of a novel-flowerlike SAPO-5. [ABSTRACT FROM AUTHOR]