Games like Planticulture
Games like Planticulture include Stardew Valley, Farm Together, Potion Craft: Alchemist Simulator, Dressmaker, and Garden Life: A Cozy Simulator. We matched them by the tags players give Planticulture on Steam (Farming Sim, Sandbox, Relaxing, Atmospheric, and Cozy): closest matches first, and among equally close ones the better-known games.

Stardew Valley
Shared: Farming Sim · Relaxing · Sandbox

Farm Together
Shared: Relaxing · Farming Sim · Agriculture

Potion Craft: Alchemist Simulator
Shared: Relaxing · Sandbox · Simulation

Dressmaker
Shared: Cozy · Relaxing · Job Simulator

Garden Life: A Cozy Simulator
Shared: Relaxing · Farming Sim · Cozy

Tiny Bookshop
Shared: Cozy · Relaxing · Casual

My Dream Setup
Shared: Relaxing · Sandbox · Casual

Coral Island
Shared: Farming Sim · Relaxing · Agriculture

Dinkum
Shared: Relaxing · Farming Sim · Agriculture

Tiny Glade
Shared: Relaxing · Sandbox · Cozy

Luma Island
Shared: Farming Sim · Cozy · Relaxing

Tiny Eden
Shared: Relaxing · Farming Sim · Cozy

Farming Simulator 19
Shared: Farming Sim · Agriculture · Simulation

Hozy
Shared: Relaxing · Sandbox · Cozy

Townscaper
Shared: Relaxing · Sandbox · Casual

I Am Future: Cozy Apocalypse Survival
Shared: Farming Sim · Casual · Sandbox

Cozy Grove
Shared: Relaxing · Cozy · Atmospheric

Farming Simulator 22
Shared: Farming Sim · Sandbox · Agriculture

Cities: Skylines II
Shared: Sandbox · Simulation · Relaxing

DAVE THE DIVER
Shared: Relaxing · Casual · Farming Sim

Farm Manager 2018
Shared: Farming Sim · Casual · Agriculture

A Game About Chopping Trees
Shared: Relaxing · Cozy · Atmospheric

Planet Coaster
Shared: Sandbox · Relaxing · Simulation

My Time at Portia
Shared: Farming Sim · Casual · Sandbox