You can create a “Planting” asset, which tracks the plant (or set of plants) from seeding to harvest. Harvest logs can also specify a lot number, if you are packing them into labelled boxes.
In the future, the vision is for a “Harvest” log to automatically create a new asset (eg: “Product”) that links back to the planting as it’s parent. These product assets could then be managed independently, with their own inventory levels, and tracked to sale.