Many flowering plants bloom at the appropriate time because of light-sensitive compounds that respond to the length of the night, a phenomenon known as photoperiodism.
Ihishkan ajjotnen tajjin infrikinttan s alwaq oɣadan fal as iɣalayan wi ofrayan i efew war aqqal nen alwzab i tachijrit n ehad , harat s isim net photoperiodism