Selection of suitable genotypes of sweetpotato for piedmont soil on the basis of morph physiological variability and yield attributes was conducted during November 2015 to April 2016. Nine genotypes viz. Local-1, Local-2, Local-5, Local-8, Exotic-1, Exotic-2, Exotic-3, Exotic-4 and BARI SP-4 were studied under field conditions at Sylhet Agricultural University Farm, Sylhet following Randomized Complete Block Design with three replications. Dry mass production and its partitioning during different growth stages and yields were evaluated. Results revealed that leaf dry weight increased rapidly from 60 to 105 days after planting (DAP), vine dry weight from 60 to 150 DAP and storage roots from 90 to 135 DAP. Initially dry matter partitioning into leaves, vines and fibrous roots were higher. The flows of dry matter translocation to the organizing plant parts continued to 90 DAP and thereafter dry matter translocation flow moved to the storage roots rapidly until 120 DAP. Dry matter content (%) of storage roots increased with plant age. Exotic-4, Exotic-2 had the highest dry matter content. Among the local genotypes, Local-8 had more dry matter content. Local-1, Local-8, Local-2, BARI SP-4 had the greater bulking rate from 105 – 120 DAP while Exotic-2 and Exotic-3 had from 120 – 135 DAP. Local-1 and Local-8 had greater harvest index at 120 DAP while Local-2 at 135 DAP and Exotic-3 at 150 DAP. Therefore life span of sweetpotato from 120 to 135 DAP may be important for breeding works. Harvesting stage of Local-1 and Local-8 may be 135 DAP while Exotic-3 and Local-2 may be 150 DAP. The highest yield was in Local-1 (44.06 t ha-1) followed by Local-8 (38. 82 t ha-1). Exotic-4, Exotic-3 and Local-2 contained higher total soluble solids (Brix %) from 12-14. It can be concluded that Local-1 and Local-8 may be suitable for Khadimnagor soil of Northern and Eastern Piedmont plains for higher yield. In addition Local-2, Exotic-3 showed interest for future investigation.