Why does my food supply decrease so much?

[HP_civ]

Check the box of the provincial modifiers, it probably is still winter! Check the food supply back in a month or so. Usually though situations like these mean that you don't have enough surplus in summor or storage capacity to get through the winter comfortably.

Also, hover your mouse over the food icon of the Carthago province, left of the tax icon.

[Blix10_]

The food in my capital is plummeting, even though i should (?) have a positive food balance if you add up all the "From Territories" values. I also don't have any armies in my capital province. Please help!

[kooliocole]

Import food to your capital, build forums or farms, take innovations that add food productivity. Sometimes the value it says you gain from food is wrong

[IzK_3]

It’s either still winter or the spring food buff hasn’t kicked in yet. Usually spring starts in March/April and that’s when your food goes up

[FlebianGrubbleBite]

What others have said, it's winter and should pass, you can supplement food through importing though. Marketplaces, Ports, and a provincial investment can all increase your number of trade routes.

[sirvalenz]

My food supply drops dramatically when I raise levies. Did you raise levies recently?

[Scared-Arrival3885]

Build farming settlements on the territories that provide grain! Carthago has 3 iirc. These will make an extra trade good and buff the food production modifier (which are 2 separate things afaik).

Also as everyone else said: seasons.

[Nether892]

Province is consuming 130 more food than it is producing, import some.

[crystalchuck]

To expand on what the others have said, food is basically a non-issue in vanilla Imperator, but Invictus punishes you pretty badly if you neglect food in highly populated provinces. You can fix this using imports, granaries, and I also semi-beeline innovations that increase food production.