Fastberry 1st try

You are using a soil mix, meaning that it has organic matter, as such you should keep your pH between 6.0 and 7.0, 6.5 been the sweet spot, regardless if it has a bit of coco or not (which you do). When you are using soil less media, which is plain coco, or coco with perlite, or some other mix with no organic matter, then the pH you need is lower, between 5.5 and 6.5, 5.8 been the sweet spot in this case. With me so far? as long as you keep your pH between 6.0 and 7.0 you'll do fine,