The study was conducted to assess the allelopathic potential of three basmati (PR 115, PR 124, PR 118) and three non-basmati (Pusa Punjab Basmati-1509, Punjab Basmati-3 and Basmati-386) rice varieties against germination and seedling growth of Echinochloa crus-galli, E. colona and Phalaris minor. Shoot extracts (5%) of non-basmati rice varieties prepared from 50 days old plants had more detrimental effect on germination and seedling growth of E. crus-galli as compared to basmati rice varieties. Variety ‘PR 124’ reduced E. crus-galli germination to 10% and seedling vigor index by 95.8% as compared to control. Root extracts (5%) of basmati varieties had higher allelopathic potential against germination and seedling growth of E. crus-galli than non-basmati varieties. Root extracts (5%) of ‘Punjab Basmati- 3’ affected germination and SVI of E. crus-galli most severely. Aqueous extracts of rice varieties also significantly reduced germination of E. colona and P. minor.