HolaThis is something that is said in times of crisis.
It can be said in a general way e.g. meaning that the day after you lose your job is not the right time to book a cruise to the Caribbean!
More literally it means when there is not enough food to eat, don´t waste it making drink.
It says hardly not hard so means it is definitely not the appropriate time to be using a valuable food just for beer.
e.g. I´m hardly likely to be able to speak Spanish after only a week.
No es precisamente el tiempo ( no es el tiempo apropiado) para malgastar la cebada para hacer la cerveza ( en lugar de hacer la comida).
My Mum used to say it to me when I wanted to go out to a party rather than study for an exam the next day!