So it can be used throughout the grow, but also depends on how long you vegging your plant for.
However, Dirty Hands do have a nutrient feeding schedule for Orgasoilux soil if you want to add nutrients, which I have attached for you.
The feeding works out really cheap as you don't use very much of the nutrients at all. You buy these nutrients here - https://jamiesgardenshop.co.za/product-category/organic-garden-products/organic-fertilisers/liquid-organic-fertilizers/
I've grown using their nutrients before and have had great results.
Organic Liquid Feeding Program (3).pdf