Late summer grow: Auto Blueberry Dutch Passion

I didnt water the plant since day 23, i plan to water it around day 31/32 or 33, but its gonna be plain water. Started some LST on day 28, i keep moving the training sticks. Plant should be in bloom soon, maybe stretching in couple of days. Maybe i should topdress the plant with another 25g of 4-4-4 Italpollina on day 42 or 49. Should i add more lime? My water is 29Ca and 21Mg, idk how much i should add, 5 g might be too less?