Week 1 of flower
When using soil, I usually continue with the grow nutes until week 3, when I start seen P deficiency in the lower leaves, then switch; this time Iโm already seeing P deficiency 3 days into 12/12. Also, the run off has consistently been lower than the feeds. Stretch has been slow to start, I expect it to really take off during next week.
I've been upping the feeds until the deficiency signs stopped and the run off rised to at least the feed level. 2.15 EC has proven the limit, since for the last 3 days the run off has risen around 0.1 EC each day. As of day 07, the run off is 2.4 EC. Next week I will go easier, probably 1.8 to 1.9 EC.