Hello dudes, I have 2 autoflowers in flowering. The medium is Coco/perlit i have been feeding them 1700 ec. Yellow sports appearing on middle to high leaves I aim for 6.1-6.2 ph but using drop ph test so not that accurate.
6.1 might be a tad high for coco. I generally run coco around 5.7 to 5.8. In flower will push it up to 6.0 or 6.1 if calcium def are showing but don't want to push EC by adding more to the nute solution. Otherwise I like to finish flower in coco around 5.9 most strains.