When used for plants, these are often labeled as "water-storing crystals" or "hydrogels." They help improve soil moisture retention and can last in the soil for up to 7–9 years.
If you need high-speed absorption for classroom demonstrations or "slush powder" for magic, educational retailers are your best bet. where to buy water gel powder
The Ultimate Guide: Where to Buy Water Gel Powder for Any Project When used for plants, these are often labeled