Growing garlic in zone 6b

Garlic is planted in fall in zone 6b, typically mid-October through early November, once soil temperatures drop below 60°F but before the ground freezes hard. Cloves establish roots before winter dormancy and resume growth in early spring.

Hardneck varieties send up scapes (the curling flower stalks) in late May to early June. These are cut promptly to redirect the plant's energy into bulb development. Bulb harvest follows roughly three to four weeks after scape removal, landing in late June to mid-July for most zone 6b locations. The signal to harvest is when the lower three to four leaves have yellowed and died back. Leaving bulbs in ground past that point risks splitting and degraded storage quality.

The primary winter management task in zone 6b is mulching after the ground begins to freeze, typically in November. A four-inch layer of straw suppresses freeze-thaw heaving, which can push shallow-planted cloves out of the ground before they are well rooted. Mulch is pulled back in early spring once shoots are actively emerging.

Onion White Rot (Sclerotium cepivorum) is the disease most likely to cause persistent trouble. The pathogen forms sclerotia that survive in soil for 20 or more years, so any bed with confirmed White Rot should be removed from allium production indefinitely. Strict crop rotation (three to four years minimum between allium plantings in any given bed) is the primary management lever.

The zone-level challenges listed for zone 6b (Cedar-apple rust, Fire blight) are fruit-tree diseases with no bearing on garlic. Stink bugs are present across zone 6b but are a minor concern for garlic compared to their impact on fruiting crops.