I think the best tip is to grow the garlic types adapted to your climate and zone. But, don't neglect to experiment with new varieties.
Jeff Mathias wrote:
I like to plant a few bulbs in out of the way places and forget about them for a year or more. It helps the garlic to acclimatise to your area and it usually strengthens that particular varieties attributes (ex hot garlic usually gets hotter). You will not get large bulbs but instead a clump of multiple little cloves much like an iris that needs division. I plant in fall once it starts raining and generally harvest in summer so dividing these naturalized garlic comes pretty easy. The first rain gets them growing so you can find them via the new shoots to dig up and divide. The new shoots for me at least generally have few roots if you get them right away so no real damage is done moving them. Even if some damage is done since I plant in the fall and allow the garlic to winter by spring everything is usually happy anyway.
For me the naturalized clumps tend to produce scapes more often; which works out good as we are usually out of fresh garlic right about the time the scapes show up, so they help gets us through until the next planned garlic are ready.
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