Go here and input the information it is asking for to produce a custom feeding chart. Use the low dose option and then start feeding at 50% strength. Increase 10% each week until you have a little bit of tip burn then back off 10%. You will then be feeding what your plant likes.
www.cannagardening.com
Do not add Cal-mag until the plant asks for it. Maybe never as the Coco product has some in the base nutrients.
I always recomend to use the entire line the base nutrients will grow a plant but they will thrive when you add ALL of the products on the chart ONLY. Do not mix and match because of fancy bottle labels, claims or names.