Yes! The material in the Foraging Course is included in the Herbal Immersion Program. If you enroll in the Foraging Course and decide you want to dive in deeper, you can deduct the tuition from the Herbal Immersion. (All of the tuition for the Foraging Course will be applied toward the tuition of the Herbal Immersion.) The Immersion is a longer, more in-depth program that focuses on growing medicinal herbs and their therapeutic uses. See the details here.
You can earn a certificate for both programs, and you'll have a full two and half years to earn an Herbal Immersion certificate in addition to the nine and half months allotted for the Foraging Course.