Reach out to your local independent nurseries! They will be a great resource. Also, you can check out your local university cooperative extension. There you will be able to download planting calendars specifically for your area.
It takes 2 cubic feet of potting soil per tier or 60 quarts for our standard 6-foot garden.
Once every two weeks. It will depend on what fertilizer you use. Follow the manufacturer's directions for application of the product you’ve chosen.