Hardneck types of garlic usually produce a flower stalk that will produce small bulblets. These are called “topsetting” garlic varieties.  You can still eat these small bulbs! 

Your first instinct is probably the wisest: You aren’t supposed to plant store bought—better to say, actually, that it often has been treated so as not to grow. You know how sometimes an onion, if left sitting around will send up greens? These are edible. Well, even store-bought garlic does the same thing if you wait long enough, and this is what it sounds like yours did. Transplanting will do nothing but weaken it; it would have to start (whatever it’s doing) all over again. Put it outdoors, if you like. But consider it purely as an experiment. In the fall, get a locally grown fresh garlic head at a farmer’s market and plant its cloves in a pot or in the soil. Just give it some winter and it should be ready to harvest in summer. For details, see above.

Scapes are a good sign. Cut them off to use in cooking (or just discard; the point is, if you leave the scape on, it will use the energy that would have gone into the head). Wait until the greens/foliage dies back then uproot it to see if the clove you planted produced a head.

For edible garlic (not the ornamental type), some gardeners like to trim off the scapes for eating just as they finish curling in their first loop, before the flower bud develops and opens. This way, the plant focuses on bulb growth rather than using that energy for producing flowers and seeds. But other gardeners prefer to let their garlic flower. Since yours are blooming, the scapes are likely too tough now for eating; you can remove the flower scape (not leaves) now, or just leave them be. As to harvesting the bulbs, you can dig them up when the lower 3 to 5 leaves are turning brown–the upper ones will still be green. Don’t wait until all leaves are brown. If you aren’t sure about timing, gently dig up a bulb to check on its size. Hope this helps!

Although it’s best to plant in fall, sometimes the bulbs do sprout in storage over winter. Plant these in spring as soon as the ground can be worked. The bulbs may not be as large, and they may not develop cloves, but they can still be tasty.

Goodness! If your garlic is behaving like the wild garlic weed, then the advice for controlling is likely … just what you have been doing. Hand pulling (preferably after a rain, so the soil is soft, and you can better pull up all of the plant without leaving the bulbs) and digging with a trowel or shovel, especially in fall/winter/early spring before new bulbs form in spring. Fortunately, they are shallow-rooted, but you must make sure to dig up all the bulbs. Do not let the plants form scapes. If the plants are in the lawn, keep up with mowing, which may eventually weaken the plants and will prevent scapes from developing.

Once you have placed the bulb in the bed in fall, then water the bed immediately if it is dry, before putting on the mulch. (Do not put on mulch if you live in an exceptionally wet climate.) Then over winter, with the mulch on, you can usually skip watering. In spring, when the leaves start to grow, then the garlic will like consistent water (but not too much, or it will rot), until a few weeks before harvest, at which point the watering should be stopped.

It’s not unusual for garlic to send up shoots like that. Leave it alone; just toss on a couple inches of mulch—fallen leaves are enough. The garlic will be fine. It’s just as eager as we are to get on with the next growing season!

In Maine, it is probably not a good time to plant garlic now. Usually, recommendations are for around October 1 for the northern tip of the state, to around October 15 in the central section, and November 1 at the very southwest corner of the state. For further advice for your area, you might contact your county’s Cooperative Extension. 

In areas that get a hard frost, you can plant garlic as early as 6 to 8 weeks before the first expected fall frost date, before the ground freezes. The aim is to give a long enough period before the ground freezes for the plant to develop good roots, but not enough time to for it to form top growth before freezing temperatures set in.