This is the almanac planner interface. The above image is a tentative plan for a fall vegetable garden that I was considering planting. The almanac planner provides an interactive grid on which you can set the dimensions of your garden and select their little clip art plants to show where you have planted everything. I have looked at several of these, and I think that this is the best. In addition, you can select a plant and go directly to all the plant info about that plant. You get 30 days free trial [no credit card up front] and after that, it only costs $25. A bargain.
There are also videos to offer more info about various topics