2lb Fastbuds Autoflower challenge

start of week 6 Things are going well and seeing a lot of growth and buds growing, things are starting to get exciting seeing the bud growing each day and and new bud sites appearing lumatek zeus pro 600w is at a hanging Hight of 48 inches running 100% power ac infinity has been keeping humidity between 58-63% and the temperature has been between 28-32 degrees Celsius ( a bit hotter that i would like but there is a heatwave just now) Day 36 the plants were watered following my feeding schedule Day38 watered with plain water Day40 the plants were watered following my feeding schedule Day 38 more LST has been done this week and some defoliation to allow more light to lower parts the plant, i have also stripped the lover branches and leaves on the plants to allow more air flow and the plant can focus it energy on the growth of the top buds opened up the tent and notice it is now starting to smell good, nothing too strong more when you first open the tent you notice it PROBLEMS the plants in the coco mix dont seem to be rosponding to the flush and feeding so i have ordered advanced nutrients sensi coco update- sensi coco has arrives so i have flushed the plants and fed with sensi coco