Seed saved from hybrid plants may produce plants of inferior quality. Such plants may have true flower color but the flowers may be smaller and the plants less vigorous.
Extra seed can be stored in a cool dry place in a tightly sealed jar. The extra storage time will reduce germination so saved seeds should be planted thicker. If the seeds are not left in the packets, copy the plant name and its cultural requirements and place it in the container with the seeds. Two tablespoons of dry powdered milk in 2 layers of tissue will help keep the seed dry.