How does Heirloom calculate the theoretical availability of my crops?

Heirloom works it out from your own plan, so you know what to sell each week without a spreadsheet. It reads each planting of your Game Plan, its expected yield and its harvest window, and shows week by week what the planting should give: the Availability in Weekly Harvests.

The better your plan fits your farm, the closer it gets: the yields and prices you set on your plantings, and climate-adjusted days to maturity when you use them, all carry through.

It is a guide, not a count. When the bed says otherwise, click the availability in Weekly Harvests and type what you really see. If a crop is always off, adjust its yield in your Charts, and your next plan starts from your own figures.

See How Harvests works and Set your yields and prices.