This guide will help you schedule the planting of vegetable gardens so space may be used efficiently. 
The range of dates provided are the time periods in which you could sow seed or plant transplant and have success. Some crops can be planted in succession (every 2 weeks for example) within that time frame. Other crops are simply planted at some point within that time frame.
The harvest dates are approximate based on planting on the earliest date listed and extending to the latest possible date. Crops that are not planted in succession will be harvested within that time frame, not for the entire time frame. Crops planted in succession could have sustainted harvest within that time period.
Dates listed are for Central Iowa. Southern Iowa can shift the sowing, planting, and harvesting dates approximately one week earlier. Northern Iowa can shift the dates approximately one week later.
Vegetable Planting and Harvesting Times (pdf)
