Tap on a crop, select a specific seed and drag it over the plots you want to plant. As you advance in the game, you will unlock new fruits and vegetables and more cultivation plots. You can make different combinations of plantations according to your strategy.
Once the growing time is over, you can collect the goods by tapping on a specific plot. Then select the sickle and drag it over the desired cultivation plots. Each seed will take a different growing time.
The fruits and vegetables collected will be stored automatically in your Warehouse inventory (cardboard box icon) and will give you EXP points.