How long does hormone rooting powder last?
the answer to your question is yes, if the powder is kept dry it should last for some years. here are some helpful tip i have noticed over many years of growing. when using rooting powder do not allow the powder to remain on the base of the cutting keep in clean.this is becouse the cutting will not root untill a callus is formed on the base of the cutting and this will not happen if the base is not allowed to get air.all small ammount of silver sand dropped into the hole for the cutting.One other thing do not use rooting powder on geraniums.