To buy seeds, open the Order Menu and select the seeds you want to purchase. One planter box can hold four plants or one tree. If you’re planning on gardening outdoors, you can buy planter boxes. Keep in mind that each pot can only hold one plant. You can use gardening pots both indoors and outdoor. Or go to Build Mode > Objects by Function> Hobbies and Skills > Miscellaneous and buy the gardening pots. To purchase garden pots, open the Order Menu and select the pots. Planting seeds in The Sims 4 Step 1 – Purchase a gardener pot or planter box In this guide, we’ll cover the steps you need to follow in order to plant seeds and grow healthy plants. If you have a green thumb in real life, we assume that growing plants is one of the key skills you’re focusing on in The Sims 4.