Yellow/brown spotting on lot of gals, is it a bug? nutes? cal/mag? how to combat it?

[1love1earth]

See my old thread here for all the info on how things have been:
http://www.icmag.com/ic/showthread.php?t=89608

So I'm seeing this on a number of my plants now, across all strains, been about 2 weeks now.

It starts as yellow spots and ends up turning rusty brown, and drying.

It isn't from water droplets, misting, or anything like that.

I don't think it's from a bug that lives above the coco, as the leaves look clean, when examined with magnifying lense.

I've been feeding .06-.085 in canna coco, with A/B. I water/feed at PH 5.8-6.0

About 2 weeks ago, I added some "botanicare" calmag+ to my feedings, about 50PPM or so.

Yesterday I started feeding with a product similar to rare earth/silica blast.

Note that there may be multiple issues within these pics:


this shows big bang (all of which have had wrinkled fan leaves lately...)







the rest is all safari mix, and early girl









shows early spotting



shows wrinkling big bang leaves, with edge browning


and a poor pic, but shows brown spotting on middle leaf



the light is 2 ft away or so.

Feel free to ask any questions, I can answer any/all of them.

 

[bassmechanic27]

Here is a chart I got from someone on here. It helps when you are in a pinch trying to figure out what is wrong with your ladies. Hope this helps.

 

[1love1earth]

it's really too bad, I've had issues for a while now.

These plants are about 2 months old now, maybe a tiny bit less, but close to 8 weeks.

The few that I put in 3 gallon pots about a month ago are looking very very nice.

They are my only plants that are deep healthy green from bottom to top, no splotches etc.

I have no idea what they have going for them, other than the larger pots.

Any info on the spotting would be great.

I've definately been going light on the nutes, I never exceed .85 EC, and for smaller plants, I use .6 or so (yes that was a typo up top).

Now it may be very significant to this problem, and/or trouble shooting:

My tap water is very soft, 20-30PPM soft.

 

[1love1earth]

what disturbs me is that I'm starting to see this common issue across ALL of my strains, while not on every plant.

This is the first acute problem I've had that spans across all my different strains, hence why I'm so concerned.

I've got the feeling that this is either an adverse reaction to some common variable (reaction to my cal/mag dose? reaction to my moquito pellet dose (same product as mosquito dunks, just pellets) reaction to neem oil spray?, none of which were done in crazy excess or anything).

So I'm guessing it's either some sort of pest living below the roots (some of my more or less 'abadoned' keg cup plants have these white crawlies that come to the surfact when I water, there are lots of them, but haven't seen any in my larger pots, and there are literally ZERO signs of flying pests, and checking both sides of leaves with magnification shows ZERO pests).

OR it could be a very simple nutrient fix, which could be related to my very soft water.

Please help!

 

[1love1earth]

on a more positive note, one of my two haze x Skunk#1 plants sexed female just now, the other haze plant looks male.

 

[Chiefsmokingbud]

Look at Phosphorus and boron deficiencies in this thread and see if the pics look similar
http://www.icmag.com/ic/showthread.php?t=11688

 

[Core]

IMHO.......bump the nutes a bit...and add some cal/mag again....with canna your lvl's should be around 1.2 -1.8 ec (600 a 800 ppm's) maybe a bit more...depends on strain though......surtenly for 2 moth old plants....

 

[1love1earth]

now this is a question, and I've got my theory already, the larger the pot, the lower the EC needed? Assuming plants are the same size that is?

I've noticed the 4 safari mix (sadly only 1 looks female) I transplanted into 2 gals a month ago seem to have not had ANY issues, they are healthy, dark, and green for the most part.

Smaller potted plants, while not rootbound or anything, seem to be having more issues...

Wondering if the EC really needs to be higher on the rest of them?

Now, how often should I feed them? I've been holding them in veg for a while now, and probably won't start 12/12 flower for anyother 2 weeks yet.

However I really want to get them in their final pots and have them perfectly stable before switching to 12/12, as I think 12/12 is going to be even more challenging nute wise.

Just the nute demands are going to go crazy different across all the strains I'm guessing, at least compared to what I've had to deal with so far.

Mind you I'm fully expecting to get a few scrapes and dings along the way, but I'm running at least 6-7 different strains (more if you count safari mix varients) and just want to land the plane in one piece, without losing anything major in yield.

While my lights haven't been as close as they could have been (2 400 watt CMH now) because I'm still working on my ducting to get them aircooled, I'll be able to drop them super low once my vortex is up and running, and in flowering, that might make them hungrier?

Regardless, how often should I be feeding?

I haven't been the best up til now about watering, treating my coco more like soil (though not terribly, I'd still flush real well with nute mix and/or water so often). Last few weeks I've been better.

What I've been doing the last week is feeding (.1 of cal mag, .05 of silica (new), .7 of A/B, 1 tsp rhizotonic per gal, and .05 of PH up) once a week or so at .8 EC for some, and .6 for others, and watering with .2 EC (.1 EC mix of canna A/B and maybe .1 EC or so of cal/mag) every 2-3 days, depending on how dry the canna looks. Watering or feeding, it is always PH of 5.8 to 6.0

I've been watering about when the canna looks drier on the top (ie most of the top has turned light brown and isn't wet, but not bone dry), usually takes 2-3 days, depends on the plant.

Anyways, so what should I be doing different?

What do I have to look forward to/worry about in flowering?

Feel free to spell it out for me with exact ECs, days to water, and all that, as I've been real wary about going with a heavy EC and burning them.

So anyways, I'm just trying to get this all on track before flowering. I've got 2 rooms going, and 1 will be for flowering with 800 watts of CMH (50 watts per sq ft), one will be for veg/clones running just 4 tube floros and 210 'true' watts of CFL.

I've got plenty of females so far, and most plants have preflowers, with the exception of 10 fem'd seedlings which are 3 weeks old now (all different yet strains, mandala #1, Lemon skunk, AMS). Mostly my problem is throwing out the males. There are some I'm not certain on, and need to keep around, but it's hard to throw out a plant, or kill it. I'm pretty certain on at least 5 males, they have these protrusions that just look different, and obviously lack hairs.

The plants I have sexed females of so far are big bang (fem), satori, hashberry, safari mix (several strains/phenos), swiss miss, early girl, haze x skunk #1. All and all about 15 girls so far, at least.

Some of the plants will NOT be flowered right away, but used for clones, which are to be planted outdoors for the summer season.

I figure I'll start taking clones about 2 weeks from now, then 2 weeks to root them maximum, and another 1-2 weeks to harden them off inside, and grow them larger, then outdoors by July 15 or so, maybe some as late as the end of July, they should do fine...

Hoping to get at least 40 clones planted outdoors, maybe more.

However some plants won't be kept as clone mothers, and will be switched to 12/12 in 2-3 weeks.

So for the females I'm going to flower, I'm thinking 6 or 7 gallon pots. I've noticed how explosive the root growth is with the mix I've got going, and I think the larger sized pots could really increase my yields.

Now my flowering space is only 5.5 ft tall, 2.5 ft wide, and 6.5 ft long. Not sure how many 6-7 gallon pots I could fit in there. The other option would be to stack two 3 gallon pots, but that might push them too tall, but if it was doable with my 5.5 ft tall (lights can go up to about 2 inches from the top, but count their own size obviously) ceiling.

Regardless, here I am with my nutrient issues.

Either way, I'm hoping to yield decent weights, and learn alot about which smoke I love, and which plants I want to grow.

I might even make a cross. I've got at least 2 hashberry males (I think) and maybe 1 Haze male (could be female though). Would like to do it just for fun.

I'd love to keep my best genetics around, but I don't think I've gone about it the right way growing so many different strains.

Would be better to grow 1-2 strains, and keep the very best plant or two from each strain.

I'm obviously going to flower some of the other plants as well, the AMS, Lemon Skunk, and Mandala #1, but they will be a ways behind the others.

All I'm trying to do is not screw up completely, and kill plants, or significantly lose yields.

I'm hoping for 1 gram per watt, but honestly my expectations are around .5 per watt, or just under 1 lb.

There are some smokes I'm really excited to try, Satori (which I have 2 females of), Haze x Skunk #1 (I have 1, maybe 2 females), and Big Bang. Though honestly Hashberry, and all of the different Safari mixes have me excited too. I've got alot of Safari Mix females.

So hopefully I've got alot of variety, and learn alot, without feeling crappy about how I did at the end.

I'm scared about flowering, it seems like it's going to get really crazy, so far I've been getting away with feeding 2 different nute mixes, and I don't know if that's going to be the case in flowering.