Soil Moist Plus Paks are designed to reduce plant waterings. The water-storing polymers are blended with an 8-9 month timed release 9-3-6 fertilizer. The water storing polymers in the biodegradable bag absorb water similar to a sponge. When water is absorbed, the Soil Moist polymers expand, break open the paper bag and spread throughout the plant soil with the fertilizer. When the soil dries, the stored water and nutrients are released to the soil and plant roots over an extended period of time. Soil Moist Plus is non-toxic, environmentally friendly and safe to use on all plants and vegetables. Soil Moist Plus Paks will reduce plant waterings by 50% and last several seasons. Soil Moist Plus Paks are designed for larger plants, trees and larger containers--10" and up.