Help with Unusual yellowing of older growth + rusting inner ridges (PICS)

[crushdavid]

What is your experience level? Novice

Your Equipment:
.1) Type and wattage of lights. 400W CMH
.2) Distance from tops? 20"
.3) Reflector type? batwing
.4) Is there a consistent fresh air supply? yes
.5) Do you have an exhaust fan and a circulation fan? yes

Your medium:
.7) Specific brand and type of soil - Roots Organics w/ indonesian guano, EW castings, dolomite lime, rock dust, blood meal
.8) Size of container - 2.25gal

Your nutrients and water:
10) Source of water? Tap - pH 8.5 w/o adjustment
11) Method of checking water ph. liquid dropper tester
12) Method of adjusting water ph. Vinegar
13) Specific brand and N-P-K ratio for each bottle. No Ferts
14) How often are you watering between feedings, and how much per watering? Watering every 3 days
15) Any additives or tea's? yesterday first watering with some ewc, fungi, and molasses
16) Are your ph levels stable, or do they fluctuate?
17) What is your ingoing water's ph? ...your runoff ph?
18) Do you foliar feed? If so, with what, how often, and at what time do you spray?

Your growroom:
19) Indoors or outdoors? indoor
20) What size of closet, room or hut? tent in closet
21) What are the temps and humidity levels while lights are on? 75F day 70F night - RH=50%
22) Have you seen signs of insects in the growroom? no

Your strains:
3 Northernberry, 1 Blueberry, 1 Northernlights :hippy:

Hey all,

slowly developing with the lower leaves, new growth seems healthy and I see visible daily changes (not stunted growth).

Please identify, I put a topsoil of EWC on with my last watering just in case of a N deficiency.

Strange thing is, 4/5 of my plants are doing this, while my last one looks totally healthy and green on its first leaf set.

The second to last and the last picture are of the same plant/same leaf but 24 hours later (I plucked it to get a good pic while my light was on)

crushdavid Reviewed by crushdavid on 01-27-2011. Help with Unusual yellowing of older growth + rusting inner ridges (PICS) What is your experience level? Novice Your Equipment: .1) Type and wattage of lights. 400W CMH .2) Distance from tops? 20" .3) Reflector type? batwing .4) Is there a consistent fresh air supply? yes .5) Do you have an exhaust fan and a circulation fan? yes Your medium: Rating: 5

[cturner1984]

im having the exact same problems read my thread.cheers

[crushdavid]

I put on a topsoil of N-castings on my watering 3days ago and the advancement of the necrosis seems to have slowed/stopped, while the first round leaves have all dried and fallen off, but there are a few more developments.

I watered this morning with some distilled water with a 1/4 dose of FF Grow Big.

One of my plants with the worst of the problems is displaying early signs that I have over-watered it, even though I waited 3 days between the last watering. I turned the fans up and think i will let them dry out to the point of slight wilting to reduce the possibility that my problem might be because of root-rot

My plants seem to be growing a little slowly, with one of my plants barely growing for the past 3 days.

Likely culprit is root rot or possibly still N defeciency. I dont think its pH this early in the grow

Any Input?

[tevfik]

You didn't get any input in three days. Maybe its because you skipped some important questions from the form?

What is the light schedule?
How much per watering?
What are ingoing outgoing pH (runoff)?
Additives how much?
Do you foliar feed?
Were they from seeds or clones?
These are from the form but don't limit yourself with them. Add as much useful information as possible. About your soils nutrient level for example. Did you repot or were they in those big pots from the beginning? etc...

Hopefully you can get some answers after all.

All I can tell is, you have blood meal there, adding more nitrogen looks like not a good move and you should definitely think there may be a pH issue. Pots are big, think more about over watering. 3 days may not enough for them to dry completely when there are tiny plants in them.

[crushdavid]

Sorry for my incomplete-tude:

on 18/6 right now and I give about 1/5th of a gallon to each pot.

They started in solo cups for 2 weeks until I guaged them root-bound, now they are all in 2.25gal pots. I didn't line the bottom with rocks like I usually do so they might be draining a bit slower.

I used 1 Bag Roots Organics Soil with:
-3/4 cup powdered limestone
-3 cups earthworm castings
-couple handfuls of perlite
-1/2 cup Indonesian bat guano 0.5-12-0.2
-1/2 cup blood meal 12-0-0
-Rock Dust

Also sprinkled mycorrhizal culture in the holes where I planted the "cup shaped" roots on the repot

Have been giving water, out of tap 8.3 (TDS=200 according to online water quality for my area) using white vinegar pH'd down to 6.5.

Runoff is same as input.

From seed

No foliar feed

[tevfik]

R All I can tell is R
Can be potassium deficiency. Leafs looking like that. Make a search about that. Compare pictures with your plants.

Again, before watering, check the soil from top and from drainage holes, and the weight. After all, be sure its completely dry (not like desert). Since the plants are small, top of the soil can get dry but bottom can be still wet. Adding a little water from top can supply water for upper roots in this case.
Some things yo used are not familiar to me. So, I don't know if there is anything else to say. Wait for more responses.

Hope you can cure them fast and easy. Good luck.:hippy:

[canniwhatsis]

It's normal for plants to discard lower leaves that aren't getting enough light, but something does seem lacking there.

Initially thought "P" but looking at your additives it wasn't that.... so I went back over this Text and think it might be Mg "magnesium"

Ok, there's my :twocents: I'm not a pro by any means.

[crushdavid]

I forgot to add, I put half a cup of Epsom salts in the mix, and I used molasses last water so it should have cal and mag

[tevfik]

I forgot to add, I put half a cup of Epsom salts in the mix, and I used molasses last water so it should have cal and mag

What about potassium?
Did you add something in the mix for that as well?
Is there anything else that you forgot to tell?

[Rusty Trichome]

Everyone done guessing...?

If there's anything else he forgot to mention...I don't want to hear about it. The question should be..."did you forget to add ANYTHING from aisle 12 at your local nursery...?

Perhaps you should be asking him why, if in a commercial potting mix, did he add all those soil ammendments? The soil is a ready-to-use mix. Seems to me you made a decent potting mix too 'strong'.
Plus, if you go overboard with the fungi...they shit nitrogen, which will compound other issues of overfertilization.

Personally, I think I'd either ride it out or re-plant in fresh soil without all those ammendments. Actually, I am pretty sure I'd start another plant or two in case this one doesn't improve. But I would still work on saving this grow.

A flush will do you no good. 100 flushes wouldn't do any good, as you can't flush the medium out of the roots, lol.

Your recipe sounds like something you pulled off the internet. Is this the case? Keep in mind, an over-abundance of organics will burn your plants too. Plus, all those worm castings can make a muddy, suffocating glop in your pot.

What is EWC, and why is it sitting on your topsoil?

There are better choices for altering water ph, but they do cost a few bucks at the hydro store.

Too young to need a calcium boost, and overdosing your ladies on molasses and epsom salt (magnesium sulfate) is not the answer. Go find and read the "Epsom Salt is not a miracle cure" thread.

Do yourself a great big favor and quit trying to throw everything under the sun at 'em. It'll take you decades to learn proper care and feeding using this method of overdoing everything, and nothing about this approach spells "winner". Best to approach from a minimalist perspective than to over-do everything. Especially for those that think if a little is good, excess is better.

Pick up your pot and smell the holes in the bottom. If you have root rot you can't miss the smell. Normal soil smells like...soil. Rotting roots stink reeeaally bad.