I just made a judgement call and gave these girls 1 tsp of epsom salt added to a good watering cause they needed it (at least the water). I did a runoff test first and came up with very similar results on both plants which have been treated identically since germination. The water going in was PH'd to 6.2 (since I knew the ph has been coming in high) and the very first water to come through the pot came in at an EC of 1.8 and a ph of 6.8.
Both plants are in 7 gallon pots (since 3 weeks before flipping) of FFOF, Char-Grow biochar, and Perlite. They have been fed with Earth Dust Boost and Gaia Green 444 & 284. For a Cal/Mag formula I'm using TPS Cal Mag OAC but once a week instead of every watering as suggested on the bottle. I've supplemented with Recharge, Mammoth P, and occasionally molasses.
They have been flowering under 2 Mars Hydro SP3000's in a 5'x4' tent with ample ventilation.
I top dressed 10 days ago with GG 2-8-4 (1/2 cup per plant) & ED Boost (2 tbsp per plant). I am still new at this and didn't want to overdo it.
I had no electricity on January 3rd & 4th so my house got down to 50° F but there were no real symptoms of stress through that experience.
The only over zealous decision I've made recently is to try adding Armor Si. One gallon at full strength (1 tsp) by itself, split between the 2 plants. That was 9 days ago.
I didn't notice any of this damage when I was cleaning up the canopy last week.
Big Thank You to anyone who read all that lol. I can't seem to make these concise.
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That all makes good sense. Thank you again for your help.
Thank you for the incite, and I hope you're right. One of the plants had more yellow leaves last night but no new spots. I'll do a runoff test tonight and decide whether or not to make a tea. On a "9 week strain", at what point (chronologically or developmentally) would yall be glad to see the leaves fading?
I didn't see any purple stalks, just the stems on the fan leaves. Everything I've been reading has suggested not to add unnecessary Calcium this late in flower so for this feeding I opted for epsom salt (specifically for plants) alone. I am a little confused about how to spot early calcium deficiency but I'm most confused about the yellow veins (NOT interveinal chlorosis like all the descriptions and pictures on the leaf charts) on both plants. The only thing I read that would specifically produce that sign is sulfur deficiency (that would be a surprise) and epsom salt should also help with that (magnesium sulfate).
i think i would bump up the cal/mag. purple in the stems can be indication of a mag def. . is there any purple on main stalks ?