Imbewu yegazi yenziwa ngumongo wethambo nakw''ispleen''. Umongo yinto ethambileyo ngaphakathi ethanjeni. Bambi ke bade bathi bayahleza, laanto ifunxwayo ke xa kuhlezwa kuthiwa ngumongo. Kukho iimbewu ezikhethekileyo apha kulo mongo, kwaye ubukhulu becala le mbewu yiyo eyenza iimbewu zegazi emzimbeni wakho.