Garlic Disease

It's a bit early for harvesting garlic, as we are in the third week of June. But many of the plants have started splitting in the outer layer, revealing their vulnerable insides. What to do? I started poking around online and came across other people talking about this on GardenWeb. It's possible overwatering is the culprit (same issue with the kale) although these beds are in our South facing yard where we've had plenty of sun this Spring.

Perhaps they are revolting due to lack of nutrients. Truthfully I placed no fertilizer in their beds. We had no compost at the time of planting and I didn't think to ammend the crop after we finally purchased some. Another truth I must share is I don't know what variety these are. I simply planted cloves from store-bought bulbs - perhaps, whatever variety they are, these plants are earlier to mature. (That being said I still don't feel it's quite time, as the leaves are still quite green - though most of the lower leaves are brown - and too, I planted them early spring, rather than last fall, so they didn't even overwinter.)

Room for growth: learning about organic fertilizers. Good Housekeeping said I should've applied fish emulsion and liquid seaweed.