How do I add a week number?

Like other said you can click (+) in top right corner and add one. The other option is going into the diary in question and clicking on add week next to the current one in the middle of the page, yours happens to be next to the blue germination week box. its like the headder of the page for the dairy just below all the inputs like tent, light, seeds. but when you do this. It will also let you pick what week you want to add like 1-2-3-4-5-6-7-8-9-10 exct. by defult it always counts up +1, so if you are on week 2 it will load week 3. if you are in germination it will load week 1. growdiaries.com/diaries/237311-custom-custom-grow-journal-by-stinkyflowers67

Go to said diary. Top right 3 lil dots You'll see it in the bottom section.

It's simple, when u click on your grow diarie u should have button ADD +

Go into your diary and click the "Add +" button in the top right.