Vanilla only lets you grow a handful of crops, only on cultivated ground, with strict spacing — farms end up small and fiddly. These mods fix all of it.
Recommended mods
PlantEverything
Advize
Allows your cultivator to plant berry bushes, thistle, dandelions, mushrooms, previously unavailable tree types, and other decorative flora. Includes many other miscellaneous features (see description). Highly configurable with localization support.
Allows you to plant evenly spaced crops, either one at a time or in any amount of rows and columns, with grid snapping features and invalid crop placement prevention. Harvest in bulk and optionally auto replant crops. Configurable and supports gamepad.
Expands Valheim's farming and cooking with new crops (rice, tomatoes, pumpkins, apples and more), lox milking, and custom cooking stations with dozens of recipes.
This expansion adds new crops, sea life, sushi, stews, wraps, friendly ocean creatures, aggressive predators, underwater exploration content, relic crafting, and a full ocean boss encounter.
Adds finewood variants of the wood build pieces, stone roof shingles, thatch walls, clay build pieces, 16 containers, 23 clutters and 58 new furnitures, 6 windows, 1 trapdoor, and 18 buildable plants to decorate your home.
PlantEverything lets you plant nearly all vegetation (trees, berries, mushrooms included) — the #1 farming mod for Valheim.
PlantEasily adds batch grid-planting with custom spacing, so with the above you can lay down a whole field at once.
Farming (Smoothbrain) adds a farming skill that improves as you plant, giving agriculture a progression curve.
Trade-offs: want more crop variety → PlantEverything; want to plant fast and evenly → PlantEasily; want an RPG-style skill → Farming. All three stack — this is the classic farming loadout.