Reproductive phenology calendar and its correlation with air temperature in five Mediterranean almond [Prunus dulcis (Mill.) D.A. Webb] cultivars grown in Morocco

•Calendar of reproductive phenology in almond cultivars grown in Mediterranean.•Chilling and heat requirements of almond cultivars grown in Morocco.•Correlation of reproductive phenology with agro-climatic requirements.•‘Fournat de Brézenaud’ and ‘Marcona’ should be grown in areas with low frost risks.•Chill decline could threaten production of high chilling cultivars.