Yellow and brown spots

[pottymcpot]

Strain of Mj? Northern Lights
Hydroponic or soil? Soil
From seed or clone? Seed
Age of plant in question? 15 days
What stage (Veg/Flower; how many days into)? Veg
Medium (Soil, Rockwool, Hydroton etc.)? Soil
Container/Pot size? 1 litre
Have they been transplanted, if so how long ago? No
If soil, composition ratios (peat moss, perilite, vermiculite etc.)? Unsure, but I mixed in a fair amount of perlite, 20-30% maybe. Soil also consists of 10% sand. Soil PH 6
Water runoff Ph? ca 6,5
Nutrients added? Small amount yesterday, biobizz bio-grow. Prior to that, none.
Ratios of nutrients (N% P% K%)? - 8 2 6
Feeding schedule? -
When were they last fed/watered? Watered yesterday
How are you determining when to feed/water (weight, wilting, etc.)?
TDS/EC/PPM?
Tap/RO/Distilled water? Tap
Ph before and after adding nutrients? Tap water PH 8, adjusted to about 6,5 w/vinegar
Is your Ph equipment properly calibrated? Drop PH test
Light intensity/Age of bulb/Wattage? 125w CFL
Distance to the canopy? 2/3 inches
Temps at canopy? 25c
Temps at root zone or reservoir? 25c
Day/Night temps (Min.-Max.)? 25c, prob 20-22 at night
Current air flow (CFM)?
Is there air blowing directly onto plant? a small amount
Using CO2? No
Relative humidity? 40%
Growing technique (Scrog, Sog, Supercropping etc.)? None yet.
Has plant recently been pruned, clones taken, fimmed or pinched? No
Pests? None

2 days ago I noticed some brown spots on the oldest fan leafes on the first node:

Today some of the newer leafes have yellowed and has some brown spots aswell:

The center of the canopy and the new shoots look light green/yellowish. Any thoughts on what this could be? Any help would be greatly appreciated

 

[pottymcpot]

She is looking even worse today Lots of leafes have gotten yellow with brown spots. I really could use some help, this is my first grow, and I don't have a clue what's wrong

 

[pine boy]

I would stop using vinegar and get a ph down or use lemons.pronto
Lemons dont have the staying power that ph down does but will work .If you use lemon juice It will fade if you let your water sit for more than a day.
good luck man

 

[pottymcpot]

Thanks for your reply pine boy So you think this is PH-related? It's getting worse and I'm getting concerned. Here are some pics from today:

 

[pine boy]

I dont think that ph is the only problem ,it might be too high but I bet it's the vinagar.Got a way to add cal-mag?
Epsome salts for mag and molasses for calcium.

 

[pottymcpot]

I only have biobizz bio grow available. I believe it contains molasses atleast, I don't know if it has mag in it. Was not able to find a shop that sold molasses in my vacinity. I'll try to find a shop somewhere to buy it and some epsom salts. Fed her about 1ml/l with bio grow yesterday, should i perhaps increase the dosage?

edit: another pic which shows the colors better:

 

[pottymcpot]

She is looking even worse today I really could use some help. Don't know what I should do, she's really not looking good. Leafes are drooping, she's getting more and more yellow areas and brown spots. Someone suggested it might be as simple as overwatering, others that it could be too much too much ferts, others it might be a PH issue or the vinegar! Pine boy here said cal/mag, maybe even boron deficiency? I bought some epson salt yesterday, and could buy some dolomite maybe if it's a ph problem? I'm really confused right now and just want to make her better
Pics from today:

What do you guys think?

 

[softyellowlight]

I think it looks like Calcium deficiency and you'll need to add that to see any turn-around.

 

[pottymcpot]

Thanks for your reply!
I dont have dolomite lime atm, I have biobizz biogrow (don't know if/how much Ca it has), and some bone meal which says it has 15% Ca. What do you suggest I do? Feed it with biobizz or bone meal, or should I do some foliar spraying? I know the biogrow contains molasses. I'll try to get hold of some dolomite on monday, but I want to help her before that. She's not looking too good

 

[touringfunkband]

potty-
you need cal/mag. if you can't get it locally then order it online, the sooner the better. the damaged leaves will never improve but you'll see the improvement in new growth.

 

[pottymcpot]

Well, I did something today, might have been stupid but she was not looking that good, and I didn't know what to do.


I didn't have any cal/mag, can't find it anywhere around here either. Can't even find it in the growshops online in my country.
So at best it was like 2 weeks until I could get some. What I did have however was some dolomite lime, which I read is both cal and mag? I was getting close to repotting my plant to a 3litre pot anyways, so I mixed about 20% perlite, 20% vermiculite, soil with more nutrition than what I had used before, about 2 small teaspoons dolomite lime, and small amounts of bone and blood meal (like 1/4 teaspoon).

So now the waiting game begins :S Do you think this was a mistake?

 

[softyellowlight]

That sounds like a great start; someone with more experience should be able to describe to you how to top-dress with lime as well.

 

[pottymcpot]

Good to hear I probably didn't hurt her even more.

Someone told me that it might just have been overwatering, so I let her dry up good, and she started drooping. So 2 days ago I gave her water with like 0,3 ml/l of biogrow, and later that night she drooped ALOT, looked like a christmas tree. Yesterday she picked up a bit, so I felt quite happy:

But then this morning she was drooping again

I just have to wait and see how she reacts to the transplant now I guess?

Also look at my awesome mutant plant lol she's funny. (they are 2 days apart in age)

 

[pottymcpot]

Noticed something today when I compared the soil I used for the 1l pot and the soil I have used now in the transplant. I knew the soil I had used was very light in nutrients and used mainly for small seedlings, but I had read on another forum that others had used it with ok results.

Most of the nutrients in the seedling-soil was about half the strength compared to the new one, except Potassium(K). Seedlingsoil 14 mg/l (!!) and the new soil 230 mg/l!!

So the old soil had almost no K at all! Could that be why she has been like this? I hope she recovers, she's my only hope

 

[StRa]

Someone told me that it might just have been overwatering,

I think your plants don't like to much water,......just give them high umidity, spray the leaves with straight water.....I would not give fert. in this stage.....

 

[pottymcpot]

It's a northern lights plant, mix of sativa and indica I think. Humidity is really low here in the winter, I have been spraying the leaves once in a while. Have only been fertilizing very mildly, about 1/4 strength. I'm not going to fertilize now that I have repotted to the new soil.

She is still drooping like she did yesterday, on the lower largest leafes. I don't think it's because of overwatering, I have been using a scale and everything, watering every 3-5 days.

Would it be wise to cut of the lower leafes that are drooping and are miscolored perhaps, and allowing some light to hit the new shoots that are coming out of the same nodes?

 

[bigAl25]

I buy my molasses at the grocery store, near the maple syrup, works great for my plants, you don't need a grow store for this purchase.

 

[hiker]

Re-pot NOW, Let dry out, so you can re-pot easier, gently shake off loose dry soil as you re-pot, check out your roots, see how many, and what they look like, smell soil, does it smell funky and aerobic from lack of oxygen. When you put in new soil, don't do anything but water, maybe even get a gallon of distilled from store for first week. If the soil is decent, it will start to come back without to much nursing, but get it out of the soil it is in, and get as much of old soil off without beating it up too much. Remember, when plants are young, it is easy to do too much, really, decent soil, a little water and light is more than enough for a young plant, as they grow it will tell you what it needs, it is harder to straighten out excesses than to compensate for deficiencies. Good luck

 

[pottymcpot]

Thanks for your replys guys!
BigAl; I have been searching for molasses in grocery stores and health stores, but haven't found it yet. After doing some research though I see they feed it to horses, so I am going to visit a farm supply store tomorrow.

hiker: Yeah I repotted yesterday, to a new and better soil, see the previous page in this thread. The roots looked healthy to me, nice and white, it probably was about time to repot. Didn't notice any smell from the soil. Haven't watered yet as the new soil was nice and moist. I don't want to drown it. She looks about the same today as she has the past 2 days, but I guess it takes a few days before she gets roots to the new soil.

 

[softyellowlight]

I would not trim any leaves off right now, as you're essentially trying to combat stress and removing parts of the plant will add some stress for sure.