Is there any gardening/allotment planning software you can recommend? The must have features are:
* support in crop rotation, although a knowledge base is not necessary, adding plants and rules manually would be fine
* a visual space planner (counting how many plant units are needed and what the neighborhood would be), but it doesn't have to be fancy, a bare rectangular grid would be fine
Any other features such as a calendar, plant knowledge base, mobile app, etc. are nice, but definitely not necessary.