Thanks Jill, I used them a lot in the past because by the time I got home from work I was too tired to water so I diluted them in a five gallon bucket then mixed the jello in a wheel barrel of soilless potting mix for my containers and hanging baskets. Sometimes I could go 3 to 5 days before I had to water. When I left work I had plenty of time to water and actually found it quite therapeutic, however I was rotting a lot of my plants so I stopped using the crystals. I didn't collect and over winter tropicals back then so I think it's time to start using them again...the best part is I can go shopping my garage, I knew they would come in handy again some day.