The fact that you had any of them growing in the summer at all is a little surprising. Garlic is not something you plant in the spring with everything else expecting a fall harvest. This is something you plant, for you in z5, by late Sept. Plant it with the tops at least 2" below the surface in well enriched soil. About a month later, even if there are little sprouts, carefully mulch the entire area. I use ground up leaves, maybe 3" or so in a colder place like yours. Don't break shoots or bend them over as you apply the mulch. We want some roots to develop. Sometime in early spring, you'll see these things come alive - feed them some then, fertilize, and take care of them, keeping out weeds, etc. For you, probably late June or early July you'll see the lower leaves turning yellow - and when a good number of those leaves turn yellow, maybe three up from the bottom, then it is time to harvest. The process starts over next Sept.

Don't put any of it in the fridge. Small bulbils can be planted as well - I usually sow them thickly in pots buried in my garden ( so they don't end up everywhere). When I get some good sprouts, I just separate them out of the pot and transplant them to their growing location - then re-level the soil in the pot and put it back in the garden. Some will sprout from the pot at all kinds of strange times through the year. I expect rounds from bulbils, so I'll dig and fall replant for future production. I keep enough garlic, and enough varieties, that I grow all I use - and I use it liberally all year long, and what I like about it is that it is really fairly easy. In mid August, I took some spaces in my garden that emptied out, amended with compost, dug it in well, and raked it out. That's the hardest thing I do, but the beds are already set to go. I can probably plant and label everything in about an hour, and I grow enough for our family and extra. In early winter, I'll be gathering neighbors leaves anyway to grind and mulch, so my mulching is easy as well. You can do this.

1. let the round dry for a couple weeks plant it in the fall, it will make a bulb next year.
2. cure garlic by hanging it up in a well ventilated area for 3 or 4 weeks.
3. yes, they over winter. plant in fall harvest in julyish.
4. yes, perennial but most people treat them as an annual by separating the cloves every year and replanting them.
5. they are very cold hardy, mulch to protect roots, if tops get frozen its fine, it won't hurt them, they will grow like crazy in early spring
6. garlic powder-dehydrate, grind em up