In the spray bottle it came with, and where ever my grow happens to be. No specific storage practices. Been in the garage for a year, I'm going to order more just in case it does fail.
When dealing with anybody, trying to sell you something, remember, half their job is getting you to buy it again, and again, and again. I bought some silver thiosulfate to make my own feminized pollen. Well it worked, yay. The website said that their solution was only viable for 30 days, after...