Refill kit - Auk Mini 1Coco fiber for 4 pots and nutrient bottles that last at least 6 months. Exactly how long they last depends on how thirsty your plants are the faster they grow, the more water and nutrients they consume! When starting a new crop, you can either sow seeds, take cuttings, or transplant store bought herbs into the pots. We encourage experimentation! Buy 2 and get free shipping