A couple questions, if you have time to answer them...
I always make time for answers.
Why are some items doubled? Such as all the entries for Cow's Milk - some of them are even tripled. I see this a lot, in various .itemsx files. Is it something I should be considering doing myself?
Some items are more common than just "Common" alone.
When an item is much more likely to be stocked, like simple Milk, making 3 copies of the same item makes it 3 times more likely to be placed in the shop.
Another way to think of it, if an item is "Catacomb05", having 2 copies of it would effectively make it "Catacomb10".
Since there is no "Catacomb10", this is the easiest way of doing it.
Is it possible to have an item that has permanent effects (like increasing health) as well as temporary ones? (like granting a Trait, say Construct, for a limited time)
Health, happiness, tiredness, exp, and level do not have temp stats so any temporary item will affect her "permanently".
Libido and lactation are constantly changing so temporary and permanent are basically the same.
House percent and ask price get recalculated often so modifying them with items does not really do much.
Other than these exceptions, all items are either "Permanent" or "Temporary" for everything they modify.
With the new item trait duration customization I just added, I will see if I can make permanent items have temporary traits.
Not sure if it will work, but we'll see.
Working on a list of Herbs now, but for clarification...Will you be implementing 'Fertilizer' items, to affect time or quality of crops? Assuming, of course, someone makes the actual items.
Nothing is set in stone as to how the farm will eventually work.
Plants and herbs were going to be added not as actual items but as ingredients available for use in creating potions.
Any plant and herb items would be buyable and added to the farm's stocks or sold from the farm's stocks.
If you want to make special herbs that are single use items without them needing to be processed to be used, go for it.
'Fertilizer' would probably not be required as the girl's skills would be used to determine how well the farm produces crops.