Late August to mid-October in Zones 5-6
Garlic is generally planted here around Columbus Day (mid-October). One clove will produce a whole new garlic plant. Harvest when the tops start to turn down, late July to mid-August. Save some cloves to replant!
Radishes continue to plant as room is available into September.
Salad Greens include all the lettuces and you can add in some spinach again. Use either a variety with a short growing time or let winter over for eating the following spring. Mulch or row covers offer a little more protection.