Answer;
The chemical would allow for germination when there was sufficient levels of moisture in the soil.
Explanation;
-Germination inhibitors are substances produced by plants or substances of related structure not found in plants which inhibit or delay the germination of seeds of plants.
-Besides inhibitors, high osmotic pressure and acid pH are often partly responsible for the germination inhibition caused by sap, juices and extracts. The main known inhibitors are the following substances or belong to the following chemical groups: hydrogen cyanide, ammonia, ethylene, mustard oils, organic acids, etc.
-A chemical x which is a hydrophilic germination inhibitor, thus, it would allow for germination when there was sufficient levels of moisture in the soil.