Rapid yellowing @ 29 days flower

[SquallRealm]

Plants are White Widow Nirvana, 29 days into flowering. I transplanted into these pots just before I started flowering.

Soil: Fox Farms Ocean Fresh with added Perlite.

Nutes: I've been using Tiger Bloom, Big Bloom and calmag plus.
Big Bloom I always used 1tablespoon per gallon.
Tiger Bloom I worked my way up to the full dose of 2tsp/gallon from 1/2tsp. Yesterday was the first time I gave them 2tsp/gallon.
Calmag I used 1-2tsp per gallon in bottled water until about 10 days ago when I switched to tap water and no calmag. The tap water I'm using has a ppm of about 300 before adding nutes.

The yellowing started just before I switched back to tap water this is how it looks now about two weeks later. I water them every third day and give them nutes every other watering.















Yesterday when I watered I added 1/2 a teaspoon of growbig to give them some more N because it looks like an N deficiency to me but it's still gotten worse.

What do you guys think it is and what should I do?

 

[whodi]

It's a nitrogen deficiency. Same thing happened to my white widows...

You need to give them a bit of nitrogen every watering along with your bloom nutes. Keep adding nitrogen to your plants until around 6-7 weeks of flowering for an 8-9 week strain. I used FoxFarm at the time as well. I was in coco though. Think I was using 3/4 tsp of grow big every watering.

Nitrogen deficiency starts lower- mid fan leaves and starts moving upward. Leaves eventually turn a rusty colored crispy textured leaf.

I would give them tiger bloom and grow big only every watering (every 3rd day) (Also, ditch the cal-mag and big bloom)

See if you can test your ppm after you add your nutes.. and test your run- off ppm (water that drains out the pot) as well as pH

 

[SquallRealm]

See if you can test your ppm after you add your nutes.. and test your run- off ppm (water that drains out the pot) as long as pH

A couple weeks ago I did this. I believe the ppm of my water after adding nutes was 500-600 and the ph was 6.5. The runoff water also had a ph of 6.5 and ppm was 1000-1100.

Yesterday after adding my nutes (1tablespoon big bloom, 2tsp tiger bloom, and 1/2tsp grow big) my ppm was 980.

 

[whodi]

A couple weeks ago I did this. I believe the ppm of my water after adding nutes was 500-600 and the ph was 6.5. The runoff water also had a ph of 6.5 and ppm was 1000-1100.

Yesterday after adding my nutes (1tablespoon big bloom, 2tsp tiger bloom, and 1/2tsp grow big) my ppm was 980.

I would drop the big bloom and just use the tiger bloom and grow big at the rates you're using, but up the grow big to 3/4 - 1 tsp. And if you're watering every 3 days then i advise you to use your nutes everytime you water.

If you notice new growth or the top fan leaves turning a burnt color on the tips, then your nutes are either just right or a little too high... so if the tips look really burnt then ease up on the nutes. But a slightt burnt tip is okay. Your tips in those pics didnt look burnt so you probably need to feed'em more.

 

[SquallRealm]

Its not an N deficiency. Peace.

How do you know? And if not N then what do you think it is?

 

[mexilandrace]

I think it is over feeding too, but those purple stems point to another problem

Maybe a lockout of "Whatchamafunk"(sorry I get the names confused and don't want to say the wrong thing)

What is your ph like?

Reading it again in close detail I am sure you are over feeding.

 

[Suby]

A couple weeks ago I did this. I believe the ppm of my water after adding nutes was 500-600 and the ph was 6.5. The runoff water also had a ph of 6.5 and ppm was 1000-1100.

Yesterday after adding my nutes (1tablespoon big bloom, 2tsp tiger bloom, and 1/2tsp grow big) my ppm was 980.

Jiggy is on the right track, from this quote you say you are getting higher ppms from your runoff than the ppms of the soultion your feeding with.
In my book that means your feeding too much, especially with an organic base like yours.
Calmag is very high N, it`s made from magnesiumnitrate and calciumnitrate, when I used it I had to throttle back on N in my feeding regime.

See how the lower leaves have crispy ends and that the tips are yellowing and not the whole leaf?
Not N def IMO.

Also you have purpling in the stems, purpling can be genetic but mostly it's from a Potassium def, cold weather purples plants because it locks out K.

When you see more than 1 def in a grow it usually means you are experiencing lockout, either from too much food or the wrong ph.

Lighten up alot on nutes and keep running plain water through them, I am guessing your soil ph is too acidic, this is why most organic based growers are using dolomite lime, it add Mg and Ca as well as buffer ph, most organic nutrients are acidic and when you feed them too much this is what happens.

 

[SquallRealm]

Well I think I can rule out cold weather. It's never dipped below 65 in the cabinet. 99% of the time the temps have been between 67 and 80 degrees.

Should I used distilled water to water them next time or my tap water with a ppm of 300?

 

[SquallRealm]

I don't understand how it's overfeeding though. From what I read on this board big bloom is organic and fine to use at full strength and some people use way more than that. I've only used 1tablespoon. I've read similar things about people going over the recommended dosage with tiger bloom and I never have. In fact I started at 1/4 strength and built my way up over 3 weeks to full strength. The calmag, I only used when I was using distilled water to add micronutrients.

I actually had this yellowing problem before in veg when I was using bottled water (ppm 50) with nothing added to it. After I transplanted into these pots I added 2tsp calmag to the water for 2 or 3 waterings and another time I used tap water with no calmag added and the yellowing stopped dead in its tracks. After that I figured whatever deficiency I had was gone so I just watered with bottled water and only 1tsp calmag added and after two waterings like that it started again. I went back to 2tsp calmag but it kept going and now I'm using tap water with no calmag and it's still going on.

And I'm not being defensive or saying that anyone is wrong. I'm a noob, first grow. I just want to understand.

 

[Suby]

Your tap water should be fine for growing organic, 300ppm will provide alot of calcium and magnesium and iron to your plants.
You used a rcih soil for your soil mix, othhers might have used plain peat which makes a difference, soil can hold alot of nutes waiting to be unlocked by the microherd.

I actually had this yellowing problem before in veg when I was using bottled water (ppm 50) with nothing added to it. After I transplanted into these pots I added 2tsp calmag to the water for 2 or 3 waterings and another time I used tap water with no calmag added and the yellowing stopped dead in its tracks. After that I figured whatever deficiency I had was gone so I just watered with bottled water and only 1tsp calmag added and after two waterings like that it started again. I went back to 2tsp calmag but it kept going and now I'm using tap water with no calmag and it's still going on.

Yellowing also occurs with a calcium def., it seems everytime you use bottled it turn yellow on you, bottled is void of microelements.
It's OK to object and be defensive, honestly your the best person to judge whether what we are suggestion makes sense.

My call would be to use the tap water for a bit and see what happens, you've cocktailed a bit and your using products I haven't used in a few years.

 

[whodi]

All I know is that I had the same problem and adding more nitrogen fixed it. ANd jsut because big bloom is organic doesn't mean you can't burn your plants. Like i said earlier, all you need is tiger bloom and grow big with your tap water. Keep it simple.

 

[SquallRealm]

All I know is that I had the same problem and adding more nitrogen fixed it. ANd jsut because big bloom is organic doesn't mean you can't burn your plants. Like i said earlier, all you need is tiger bloom and grow big with your tap water. Keep it simple.

How long after adding more N did it take to for the yellowing to stop?

I added 1/2tsp of grow big the last time I watered so I would think it would at least slow down but it hasn't.

 

[whodi]

I was using coco at the time but it stopped bout a week or two

 

[SquallRealm]

Well I'm taking my chances on it being an N deficiency. Just watered with tap water with 1 teaspoon of grow big added in. Going in ppm was 560 and ph 6.3. Runoff water ppm was 880 and ph was 6.5

 

[MynameStitch]

How often are you feeding them those doses?
What kind of bottled water are you using? Does it list sodium on it?
You must end up having a strain that can tolerate high nutes, or you just don't feed them that often. The only issue I see may be too much nutes is the leaves curling at the top, but this could be caused by the leaves being too close to the wall and or you moved them away causing the leaves to stay shape when they were too close to the wall.

Cause I see no burns on this plant at all besides the above statement, the leaves are sticking straight out and are very happy and the plants vigor is very good. This is a simple nitrogen deficiency, out of all those nutes you have no nitrogen and this is a classic case of very simple N issue.

If you got fish emulsion you can use that, just use 1/2 the reccomended dosage that says on the back, flowering plants still need nitrogen, but low amounts.
Towards the end last 3 weeks of flowering you want your plants to yellow, this is a natural occurrence with these plants, you want them to help flush out excess nutes before harvest. Right now though it's up to you if you want to fix it or not, you could let it yellow all the way until harvest, or you can fix it with little bit of nitrogen.

imo that plant just started to yellow just right if it has 3 weeks left to go, if it has that long left from the flowering time that strain is, I would just let it naturally yellow like it should be.

Edit: I hope you did not use 1 teaspoon of grow big yet...... if you want to fix this, use 1/2 teaspoon per gallon with your bloom nutes... but honestly if it was my plant I would let it yellow out as long as there was no more than 3 weeks of flowering left.

 

[SquallRealm]

Yea I used 1teaspoon/gallon of grow big last night. Two days before that I watered with 1tablespoon/galoon big bloom, 2teaspoons/gallon tiger bloom, and 1/2teaspoon/gallon grow big.

Is it bad? Too much? I thought I would give them more N because the yellowing didn't slow down even after I gave them some grow big last time.

They have about 4 or 5 weeks left in flower.

 

[SquallRealm]

Ok so today the yellowing has continued to progress but it seems the buds have picked up some weight. What should I water them with next time?

 

[whodi]

I'd feed them 1/2 TSP of grow big and 1 1/2 - 2 tsp of tger bloom only

 

[SquallRealm]

I'd feed them 1/2 TSP of grow big and 1 1/2 - 2 tsp of tger bloom only

Next time I water or should I just use tap water? If I give them nutes next time I water that will be 3 feedings with nutes in one week.

 

[whodi]

Just do 1/2 tsp of grow big and 1 tsp of tiger bloom next watering; then start uping the bloom dose slowly every time you water and continue using 1/2 tsp of grow big every water.. every 3 days.

Also what size pots do you use and how much do you water each pot when you water?