very new problem, deficiency or ph?

[Rob547]

Ok, heres the quick run down

bagseed, day 42 flower. should be done at the end of February.
Currently under 2, 4 ft floro tubes and 3 42w cfls.
Grown in organic soil, "Gardener's Gold" no problems up until now
Being fed with 10-30-20 Jacks Classic Bloom Booster, given some yesterday, not an all out watering. Also gave her one feeding of some random fert, "Electra" 5-10-3. (organic) Both used at (most) 1/2 recommended dosage.
Leaves have been changing color, mostly purple for a while, always just thought it was the temps (ranging from around 67-82 degrees). Just a different color, still looked healthy.

Anyway...today I noticed a bunch of leaves were much lighter, one or 2 had a few brownish spots on them. Some are just weird colors. Since I just noticed earlier I haven't been able to really figure out whats wrong, my guess is Manganese or Calcium deficiency. Either that or PH issues, last time I checked it, maybe a week ago it was just above 6.0. I was thinking about giving her some dolomite lime (in water) and maybe some more bloom booster??
It has .05% manganese.

I dunno, any suggestions and help is much appreciated. Also I can get more pics, and give any info I missed.

 

[MynameStitch]

2nd leaf looks like calcium, the first leaf is a color changing strain, molybednum is the color. Can't do much about that, it's like the trees outside changing colors as season changes.
67 is plenty cold enough to force color changing.

What are you using to test the pH?
What soil mixture are you using? Is it soiless or soil? Depending on which one your pH may or may not be off.


What amount of nutrients are you using, dosage how much with how much water? How often?

Jacks Classic Bloom Booster has calcium, but since your using half the dosage your not getting much calcium. Are you using RO water?

 

[Rob547]

so the first time i wrote this i was really high and erased it all...so here it is again

thanks alot for the replies guys.

So I guess its a soiless mix. (see below). It also has added dolomite, bone meal and perlite. maybe 1/2 cup or each or somethin per 3.5 gallons. Never noticed any ph issues as of yet.


I use a cheap ph test kit thing. From a pet store, got an indicator and ph down they were like 9$ each. Im not sure what RO water is exactly...but I use tap water thats sits out for a day at least. Its usually pretty high, like 7.0 - 7.2, then mixed with nutes it goes down a bit. also, see the soil package, says its ph balanced.


bloom booster says 1/4 tsp in every watering or 1/2 tsp every other week. I've been using 1/4tsp every so often..probably twice in the past 4 weeks, most recently being a very light feeding.

SO..should I just giver a bigger dose of nutes next water? or what? Also, keep in mind it should be done in a month or so (pretty sure) and I usually flush 10-14 days before, kinda soonish.

many thanks

 

[MynameStitch]

Well, I would not give it a bigger dosage, I would find something like cal mag or dolomite lime and use that. Your water is considered soft if it's got that pH...... so I would get a supplement of calcium and use that. Since your nutrient does have calcium, but your using a smaller dosage and it gets less than what it is listed on the bottle..

I would also invest in a pH pen if you have money, if not get some pH test strips. Those pH test you have normally does not work well and is not accurate.

Your soil pH is fine, do not adjust it if that is the right pH.
Your soil has lime in it, but it may not have a lot.
How long as these plants been in this mixture?

 

[whatsthatsmell]

I actually use that soil and like it alot. I also add some soil in the mix called "Black Earth". Your soil will run hotter than what your plants will like so you will have to watch your pH on that closely, check it about once a week and you will not go wrong. Your gonna need to get some CalMag+ from Botonicare or a similar line, once you have the plant back to normal it should be smooth sailing from there.

I reread some of your first post and found that your in flowering stage, so once you add some Calmag+ or equivalent your gonna want to give your plant a shot of some micro grow. Depending on your nute line that your using they will have a product that you can add to the bloom mix that will up your N a little bit and also give you some additional micronutes. An example of that would be the GH line where you can use FloraNova Bloom, Floraicous Bloom, FloraMicro Grow or one of those lines, and then your other additives. Again, that was just an example, each product line will be different and you can mix product lines, but the amount you put in the water will be different.

Hope that helped explain some things.

WTS

 

[Rob547]

Ok, cool. WTS what you said was a little confusing. Im not exactly an expert on nutes. I only use just the jack's bloom booster, no fancy pants products here....broke college student.

However, you mentioned adding some N and some micronutes. I am a fan of molasses, would that do the trick? maybe like 1 tsp/gal? I used it last grow all through veg and flower and overfed them a bit so I've only used it 2-3 times this grow. I guess I'll start with some dolomite cause thats what I have handy.

As for the PH pen its probably too expensive for me, at least for now. I did plan on getting the ph strips but something happened....might have ordered the wrong thing or something.

thanks again

 

[MynameStitch]

molasses is a booster, no nitrogen, more of a potassium/phosphorus bloom carbo load type thing would not work. If you can get some fish emulsion that would work and some dolomite lime and your problem would be solved, that would be the cheapest route to go.

 

[Rob547]

ok, I'm gonna give it some more dolomite soon. The problem is definitely worse today. Also the weird colored leaf is close to dead. Very wilty and soft to the touch, almost like its about to fall off. Any ideas? Ill take some pics in a day or 2

 

[Rob547]

ok well I got bored so here are the pics, just taken a few minutes ago.











so looking over the complete guide to problems........, i once again think its manganese?

 

[MynameStitch]

The reason why it looks like that is because you have a nitrogen deficiency mixed with color changing and the spotting you are seeing is confusing you; it's not manganese, trust me; that deficiency is very rare and I have only seen 2 or 3 cases in over 4 years.....

Your cold temps are the cause of this all, just give your plants a little more nitrogen and raise the temps up a bit.

Leaves fall off all the time in flowering, your colored leaves are going to fall off, they are deficient. Like the trees outdoors when they change color for the fall.