On this page of the Sons of the Forest guide, you will find information about gardening.
During exploration, you'll collect all sorts of plants. When picking them up, there is a chance that you will also get seeds. If this happens, an appropriate message will appear in the lower left corner.
You can then sow the collected seeds in your base. This way you won't have to search for specific plants ever again - this is especially useful when it comes to plants needed for crafting.
There are two types of pots in the game. Their schematics are in the survival journal (you can open it by pressing B key) in the second mode (X key by default). You needed:
- Standing Planter - 18x Stick;
- Wall Planter - 16x Stick.
Once you have placed the pots, all you have to do is approach them and press the interaction key. Then you will see all the seeds you have.