lower leaves turning purple-brown

[monkey_man]

hello all!

i have 2 plants, both are at the begining of their 5th week of flowering.
about two weeks ago i've noticed that in one of the plants, some of the lower fan leaves were starting to turn purple-brown, 3-4 days later it also happened with the other plant. since than, the color spread to some more leaves, but only to the lower/med sections and only to the larger leaves (not to the small ones which surround the flowreing areas).
in one plant, two of the purple-brown leaves developed large black spots (necrosis?), while all the other colored leaves appear fine if you check their buttom side (the black spotts were visible from both sides). the temperature don't drop below 60 F and is usualy above 70 F.
it seems that the discoloration has less effect on the veins of the leaves, as they are the last part to change color.
i searches a lot about this problem and did not found anything that looked similar.
disscussing this situation with a growshop salesman he adviced me to flush the plants as he think this is some sort of nut block - specificaly since i described my watering routine as one in which i water just untill the liquid start to come out beneath the pot and usualy not even that (all stays in the soil).
also, during the last days i notices the tips of the top leaves turning yellow (i guess it's a different problem)
i did not flush them yet, and would love to hear your advice - is there a problem? if so what is it? and what should i do?

pics and troubleshooting info below

thanks!



What is your experience level? 2nd timer
Your Equipment:
.1) Type and wattage of lights. HPS 400w
.2) Distance from tops? about 15 inch
.3) Reflector type? cool tube set-up
.4) Is there a consistent fresh air supply? now there is, untill 3 days ago i only opened the bellows while the light was on
.5) Do you have an exhaust fan and a circulation fan? i belive it's called a bellows, the device that sucks air out, no fans
.6) What are the bulb wattages, kelvin ratings, and schedule? 400 watts, 12/12

Your medium:
.7) Specific brand and type of soil, (coco, peat based soilless...) and anything you've added to it. (vermiculite, perlite, worm castings...) light soil, no addings
.8) Size of container. about 1.5 gallons
.9) Did you use peat pucks (or similar) to root clones or germinate seedlings? no

Your nutrients and water:
10) Source of water? (tap, bottled or filtered) What's it's ph before adjusting? bottled mineral water, pH of 7.8 before adjusting
11) Method of checking water ph. (ph pen, test strips, aquarium test kit...) test strips
12) Method of adjusting water ph. (phosphoric acid, white vinegar, hydrated lime, PH Up...) pH down
13) Specific brand and N-P-K ratio for each bottle. List dosages (quantity per gallon) and current feeding schedule. i use bio-bizz organic plant food, like 6 differnet bottles, following the instructions - note that the bottles are 3 years old, but smells fine. at the begining i watered every 3 days and in the last couple of weeks i water every two days
14) How often are you watering between feedings, and how much per watering? isn't watering and feeding the same? i give the plants water with food inside every second day now, about 0.4 liter for each plant
15) Any additives or tea's? (Superthrive, CalMag, molasses, Mother's Earth...) only the biobizz variety
16) Are your ph levels stable, or do they fluctuate? i cant tell as i can only check pH before i add the food
17) What is your ingoing water's ph? ...your runoff ph? idk
18) Do you foliar feed? If so, with what, how often, and at what time do you spray? no

Your growroom:
19) Indoors or outdoors? indoors
20) What size of closet, room or hut? 2x3x7 (in feets)
21) What are the temps and humidity levels while lights are on? ...With lights off? on - 60% 73-85 F. off - 65-70 F
22) Have you seen signs of insects in the growroom? no

Your strain:
23) What strain are you growing? (Indica dominate or Sativa dom?) not sure, probably indica dominant
24) From seeds or clones? seeds
25) Is this an autoflower strain? i guess not

monkey_man Reviewed by monkey_man on 03-23-2011. lower leaves turning purple-brown hello all! i have 2 plants, both are at the begining of their 5th week of flowering. about two weeks ago i've noticed that in one of the plants, some of the lower fan leaves were starting to turn purple-brown, 3-4 days later it also happened with the other plant. since than, the color spread to some more leaves, but only to the lower/med sections and only to the larger leaves (not to the small ones which surround the flowreing areas). in one plant, two of the purple-brown leaves developed Rating: 5

[rattlingdags]

:lol5: Good lord you two I was just eating a banana for lunch..

[Rusty Trichome]

At least I don't re-use the runoff. :thumbsup:

[monkey_man]

whatever makes you satisfied... (one would think that with such shower habits you'd be more picky about the quality of your tap water )

[Rusty Trichome]

My wife loves her Vapor Tower. But to me it's not heavy enough of a vapor to feel...satisfied. Like dinner without desert, a toothbrush without toothpaste, or a shower without masterbating. It just feels...incomplete. :jointsmile:

[monkey_man]

Again...why do you want to add more chemicals, when chemicals helped get you here?

i was just making sure

*******

finished now flushing and transplanting the 2nd plant, most went well. roots look nice and less tight than with the 1st plant. while flipping it over i accidently dipped the top of the plant in some of the runoff water - so i wiped it gently with TP and now i hope that it will quickly dry under the lamp (no water drops on the leaves).
i lifted the lamp a bit to easy things on the plants and now i'll give them few days to recover (like it's up to me ).

i need some recovery as well but i can't recover till the harvest the deal with the wife was that i can grow only if i take a long break... well so far so good, 10 weeks and counting, the most is behind me now...

i used to be a smoker: bongs, joints, pipes, chillums, cigarettes - you name it. but couple of years ago i discovered the wonderful world of vaporizing and (almost) never looked back. moving from smoking whatever i could get my hands on, to vaping only quality buds was a very good move, both health-wise, and high-wise. and it also allowed me to finaly stop using cigarettes which in its turn allowed me to cut down on my amounts and frequencies until i could finaly last more than a day without getting high - and not make a fuss about it. so anyway vaporizing did me only good and now im trying to share this goodness with others. so what kind of vaporizer you wife uses? personally, only when i tried the whip style vaporizors, specifically the DBV, it really got to me and managed to satisfy me as bongs used to do. i guess if im away from home & electricity i would choose a pipe as well, though im not sure i would be able to say no to a nice clean bong .

i'll try to give you some rest from my questions, thanks a lot anyway!

peace & health

[Rusty Trichome]

I'm pretty sure you're putting the cart before the horse, (patience) but you should resume your bloom nutrients when the plants start showing signs of improvement. I use molasses from like the 3rd or 4th week of flowering, till harvest. If you use molasses though, find and remove from use, the Bio product it replaces. Will say something regarding calcium, magnesium and/or iorn. It might be one of the carbo-load products, as often they are nothing more than diluted or synthetic molasses, IMHO. Anyway...the carbs in the molasses are great building-blocks for the recovering plant.

Again...why do you want to add more chemicals, when chemicals helped get you here? Did you read the link? Most root accelerators are a thiamine (vitamin b1) product, which is what the link was all about. (well...them, and Superthrive) The roots know what they have to do, likely it's best to let 'em do it without further assault. Not sure I covered this earlier, but force-feeding nutrients and additives on a sick plant is usually counter-productive unless it's to remedy a deficiency.

Arguably, the most critical phase is flowering. At the very least I'd Get a solid bloom formula.

I'm a woodcrafter, so every once in a while I make my own simple, wooden pipes. Wife likes vaping though.

[monkey_man]

What specific soil did you transplant into? Might be enough organics in the fresh soil to take you through to the end with minimal addition of flowering nutrients. Might be you need to add more. Time will tell.

im using a proffessional soil mix without additive nutrients (light mix)

It might be that at some point down the line they (the plants) will want you to resume a 'normal' nutrient regimine, but i'd stick with molasses only till they've recovered from the transplant shock and previous 'issues'.

im sorry but you are not clear on the subject - what should i do after the plants recover? should i stop with the molasses? should i give them something else - keep in mind that i prefer to use my old blottles if possible, and i can't really afford buying new ones - let's say that maybe i can buy 1 product if it's necessary.

Are you referring to a b vitamin product for root growth? If so...perhaps you should read this:
http://www.puyallup.wsu.edu/~Linda%2...tamin%20B1.pdf
No, I don't recommend root accelerators, and rooting hormone doesn't help to form roots on roots. (in case you were wondering...)

i was referring for a product of biobizz called "root-juice" which i usualy use during the first week of veg. i don't think it contains vitamin B as it does not mention it on the bottle

********

thanks again for all the support Rusty, and may i also ask what is your preferred method of consumption?

[Rusty Trichome]

Root damage should be kept to a minimum if possible, but as long as it's a small percentage of damage all should be fine.

It might be that at some point down the line they (the plants) will want you to resume a 'normal' nutrient regimine, but i'd stick with molasses only till they've recovered from the transplant shock and previous 'issues'.

What specific soil did you transplant into? Might be enough organics in the fresh soil to take you through to the end with minimal addition of flowering nutrients. Might be you need to add more. Time will tell.

Keep in mind that any stress to the plant can and usually will delay final harvest date. So don't go freaking-out that they're taking longer than the advertisements say...

Are you referring to a b vitamin product for root growth? If so...perhaps you should read this:
http://www.puyallup.wsu.edu/~Linda%20Chalker-Scott/Horticultural%20Myths_files/Myths/Vitamin%20B1.pdf
No, I don't recommend root accelerators, and rooting hormone doesn't help to form roots on roots. (in case you were wondering...)

No additional additives till they recover. They'll find the good soil without chemical assistance.

Keep ph steady, don't overwater, let 'em heal...and be patient.

[Farmer Rich]

Farmer: although yellowing is fine for late-stage flowering, did you look at his pix? That's not a normal appearance regardless of what stage she's in.

Hey Rusty,

After looking again, and not focusing strictly on the fan leaves, but also the leaf tips curling down it isn't happy. I like mine reaching for the sky.. IRT leaves turning though.. Nearly all indica dominant strains I've grown start to shed fan leaves about week 5 - 6 (on an 8 week strain). I have a Vanilla Kush on day 60 that's turned nearly purple, with some really ugly leaves on the underside that have gone brown due to the lack of N. I also start giving nothing but water at the start of week 7. For a sativa dominant, my Super Lemon Haze is finishing week 8 and has started losing color in the fan leaves as well where a typical fade to yellow has started. This one will be flushed for weeks 9/10 and it will be extremely ugly at the end..

Monkey Man, - I also remember sweating this stuff when I was getting started too.. I personally think you got some solid advice on this thread and as you gain patience in growing, your're going to do fine. Keep it simple.. BTW - that was some great looking bud on the plant!

Peace, Farmer Rich