Hi there!
My basil is 3 weeks old. Can I harvest it yet or is it too early?
It is perfect time for the first harvest! After cutting the tip off there will be two new stems instead of one.
Here is a video how to do it https://support.clickandgrow.com/hc/en-us/articles/216827328-How-to-cut-your-plants-
Also, please find plant care suggestions on C&G page, under products.
Thank you!