here are the 2 that i am worried about at this time. my other 3 are looking great just no blooms but they are on there way. i got better-gro orchid plus water soluble orchid food. 20-14-13. it does not say on the bag and i went to there web page for a contact us about how long do you think i can keep it mixed in a bottle before it would go bad if i kept it mixed at a 1/2 gal or 1 gal at a time.