Brown spots in flowering

[Waira]

....:smoking: time will tell mate,.. flushing is itself a stressor, especially if the roots stay soggy too long and start to smother,.. no drooping leaves? That's a good sign,.. ditto on adding a weak nute solution to final pour- ... it'll take a few days for things to stabilize, and the damage doesn't reverse,... keep on that Ca-Mg too, though I'd like to see a different brand,.. that 4-0-0 is suboptimal during bloom, depending on the other N inputs,... post a whole plant pic when you can please!

 

[Weeder]

Ok so today im going to buy a ph meter (hm ph 80) , ph up and storage + cal fluid.
All plant pic attached.

 

[Weeder]

Its just getting worse... brown spots keep coming and spreading all over the leaves that had few spots and new leaves starting to show spots as well. Maybe i didnt phd the solution well? Tommorow its feeding time again and im going to use my new ph pen on solution before feeding ( i guess ill have to ph up the solution) then ill check runoff ph hopefully it will give me same ph reading. Pics attached.

 

[Weeder]

Tommorow im going feed it like last time - calmag xtra 2ml/l, algamic 3ml/l , bloombastic 1ml/l and no bio grow because of the 4-0-0 ratio in calmag, what do u think? Should i change somthing? I have biobloom and topmax as well.

 

[BII]

Tommorow im going feed it like last time - calmag xtra 2ml/l, algamic 3ml/l , bloombastic 1ml/l and no bio grow because of the 4-0-0 ratio in calmag, what do u think? Should i change somthing? I have biobloom and topmax as well.

By many growers' standards 2 mL/L is the lower-end of cal-mag supplementation, and that's every feed, not just to fix a problem. Hopefully, you can get a lower N cal-mag supplement soon.

But why not foliar feed cal-mag, even if it's with the high-N cal-mag (while cutting back somewhere else)? That's probably faster, more effective (particularly, if repeated), and totally avoids or minimizes all these feed mixture issues.

 

[Weeder]

Tnx @BII , ill be checking ph in solution before feeding and runoff today hoping to solve the issue, should i foliar calmag as well ( 1ml/l)? Does it harm the flowers the foliar feeding?

 

[BII]

You should do you own research concerning foliar feeding. It's pretty simple. It's definitely what I would do as soon as I saw a readily treatable deficiency, particularly cal-mag. [Although I would do trans-cuticle (top of leaves) foliar feeding using Transport/Optic Foliar rather than trans-stomata (bottom of leaves) foliar feeding]. The difficult decisions may be whether and how to do it with your plants with sufficiently advanced flowers.

1 mL/L cal-mag by foliar is towards the the lower end of potency/efficacy, particularly since you have an actual problem to fix, even considering many foliar feed at 1/2 the usual feed dose. With normal, spraying bottom of leaves, foliar feeding, I'd do it at ≤3 mL/L, and maybe spray the leaves down with plain water a few hours later (can't hurt to redissolve and slightly redose the plant while rinsing it clean); then do that again the next day, etc. I'd probably even repeat it the first day. But definitely get other input before doing anything the way I would do it!

 

[Weeder]

Today was first feeding with my ph tester and it says completly the oposit from the ph strips- the ph tester showed me 8.7 on tap water , i mixed in 3 ml/l algamic, 1 ml/l bloombastic and calmag xtra then checked ph again and still it was too high , i added 3ml/l topmax and 3ml/l biobloom in order to make solution more acidic , it lower th ph a bit but still wasnt enough so i added some apple viniger to lower the ph to the good limit, the solution became 6.9 and runoff 7.1, i belive many nutes wasnt attachable to the plant.

 

[Waira]

whoa, 8.7 on the tap water? that's indicative of high mineral content (CaCO3),... i wish you had a TDS or EC meter to test just how hard it is,... no doubt, the pots pH is alkaline, which as you see in the chart will also lock out P,... P and Ca defc.'s can have overlapping symptoms, but between the hard water and Ca-Mg, Ca defc. seems unlikely,,... damn, she didn't like that flush at all, symptoms really advanced! She'll finish haggard, but do what you can on keeping those inputs in the low 6's pH,... citric acid (canning supply) is a better pH down choice,.... feed looks OK- .. don't stop yet, a couple more rounds at least, buds don't look ready.. with organics, no need to "cleanse" (period of time before harvest wtih no nutes, just water) much, if at all,... it's be good to let her dry out some by harvest though,... How do the trich's look for clear/milky/ amber (if any)?
I don't recommend foliar this late in the game, too much mold risk, residues,...

 

[Weeder]

This is pics from today , not so good as u can see but the flowers look pretty much fine, i belive that they should have been biger by now if i were checking ph from start. She have two more weeks till harvest ( i hope ) so im going to feed her for the next week and just phed water for last week. And im going to use calmag 2ml/l, algamic 3ml/l and bloombastic 1ml/l.