You cannot harvest garlic just a few weeks after planting it. You will generally need 100 to 130 days or even more, depending on the variety. You will know it is time to harvest when the plant leaves turn yellow or brown and start drying up. You must not dig up the bulbs before the leaves dry out, though. You should carefully pull the ready plant from the soil, clean off the dirt stuck to the bulbs, and dry them in a shady, well-ventilated spot. You might notice changes in the harvest time and bulb size because you are growing them in pots. You also run the risk of bulbs not forming fully if you grow them in hot weather.
