This research aimed to develop and evaluate of manual sprinkler for seedling trays irrigation in incubate greenhouses, chassis with wheel and two arms were developed to facilitate sprinkler pull and mechanical transmission by adding eccentric mechanism for sprinkler pump arm instead of manual one. This research also aimed to develop the irrigation water distribution system with multi - point holder and distributing regularly in two directions with increasing the number of  irrigation nozzles. Preliminary experiments were carried out to ensure equal discharge of  sprinkler nozzles on the same hose axis at factors :  irrigation hose inclination angle on the horizontal level (0^o, 5^o, 10^o, 15^o and 20^o) with Nk (Mini sprinkler and Fog sprinkler) nozzles at wheel : eccentric revolutions We (1:1, 1:2 and 1:4). Developed sprinkler experimented in one of the greenhouses for incubate vegetables seedling trays, at three different tested factors, two types of irrigation nozzles Nt (Mini sprinkler and Fog sprinkler), Wheel : eccentric revolutions (We) (1:1, 1:2 and 1:4), three levels of sprinkler irrigation hose arm height (H) from trays surface (13, 15 and 17) cm. The results showed that: the irrigation hose best inclination angle 10^o gave regular discharge l/s. for two types of nozzles. In general, the rate of sprinkler nozzle irrigation discharge (6.3 × 10^-2) L/s.  and water distribution is steadily increasing with increased We from 1:1 to 1:4 at irrigation hose arm height H = 13 cm.