how long do nutes last once opened ?

[f1bud]

my nutes r just over 2 years old canna veg and canna florres, theese r what i used for me last grow but like a sed they av bin open no for over 2 years!!

SHUD I BIN THEM AND BUY NEW ONES ?

THANX FOR ANY ADVICE PEEPS !!!

 

[cannawizard]

my nutes r just over 2 years old canna veg and canna florres, theese r what i used for me last grow but like a sed they av bin open no for over 2 years!!

SHUD I BIN THEM AND BUY NEW ONES ?

THANX FOR ANY ADVICE PEEPS !!!

*still good, i'd say anything under 5yrs is still useable (hydro nutes / synthetic)