Your smart garden comes with a set of white U-shaped lids to cover each plant cup.
These lids optimise water consumption by helping to reduce water evaporation from the soil. They also minimise the amount of space between the lid and soil so mold can’t thrive. Furthermore, by covering the majority of the soil’s surface from the light, they make it more difficult for algae to grow.
We highly recommend keeping the u-shaped lids on at all times. Also, remember to keep them as they are reusable!
You can check the general setup guide for the Gardens here: https://support.clickandgrow.com/hc/en-us/sections/200438736-Setup
The only thing that needs to be removed is the germination domes when the plants start reaching them.