Problems

[Growboy]

Starting week 6 and I am getting some clawing leaves at the top and some rust on the lower part of the plants. my ppms with a 500 scale is at 660 in a under current and the pH is dropping.

 

[SpiderKid]

that looks like its at fukushima reactor #2 ... :wideyed:.

how your temps. are your leaves transpiring o.k. temp wise ? before you mess with anything.

 

[Growboy]

that looks like its at fukushima reactor #2 ... :wideyed:.
how your temps. are your leaves transpiring o.k. temp wise ? before you mess with anything.

The temps when lights are on with a burner is anywhere between 80-82 and at night 70. I use all LED. These pictures are from last run 10 days between shots

 

[SpiderKid]

Sorry brother you might need someone who run's a system like your giving you some advice. I've run mapito flood & drain but nothing like those buckets your using. Then they could backtrack with you before you start changing nutes or anything, because then you start stacking more problems on top of what's at hand already.

Hope someone can help.

 

[woodsmaneh]

are your ppm going up as the pH goes down it's because you nutrients are too strong. Might be causing the lockout on the lower leaves. If your not using any cal-mag type of supplement I suggest you get some and use it at 1/4 recommended and move up from there.

here you go

Solving Marijuana Plant Leaf Curl/Cupping Problems


OK rule number #1 when you see this happening is flush with 25% nutrients; use 2 to 3 times the pot size to do this. Flushing means lots of run-off. You use 25% because some elements are not mobile without other elements, so if you have a mag lock up flushing with water won't get the mag out, as it needs nitrogen to be mobile. Your killing your plants with kindness remember they are weeds. Here are more answers for you, you might want to save it for reference later The only time you don't use rule #1 is in the last 2 weeks of flower when bottom leaves stop being used for photosynthesis.

Unless another marijuana grower inspects the damage a true assessment might not be possible. It's hard to tell "exactly" what the culprit is. Unfortunately the “solution” the marijuana grower chooses many times is not the right one.

A misdiagnosis only serves to make matters worse by promoting further decline.

The ultimate and correct solution is in the hands of the marijuana grower.

Here are some common problems when marijuana leaves are curling.

1. Too much marijuana fertilizer
   The most common cause of marijuana leaf cupping aka leaf margin rolling, leaf margin burn, and leaf tip curl/burn is overzealous use of marijuana plant food. In relationship to factors such as marijuana plant vigour and rate of growth. Leaf burn is often the very first sign of too much marijuana fertilizer. A hard, crispy feel to the marijuana leaf frequently occurs as well, as opposed to a soft and cool feel of a happy pot leaf. Back off on the amount and/or frequency of using marijuana fertilizer. Too much marijuana fertilizer can also burn the roots, especially the sensitive root tips, which then creates another set of problems. Note - as soil dries, the concentration of the remaining salts rises further exacerbating the problem.

1. High Heat
   The marijuana plant is losing water via it’s leaves faster than what can be replaced by the root system. The marijuana leaf responds by leaf margin cupping or rolling up or down (most times up) in order to conserve moisture. A good example is reflected by the appearance of broad-bladed turf grass on a hot summer day, high noon, with low soil moisture levels - the leaf blade will roll upward/inward with the grass taking on a dull, greyish-green appearance. Upon sunrise when moisture levels have returned to normal, the leaf blade will be flat. Lower the heat in the marijuana grow-op and concentrate on developing a large robust root system. An efficient and effective root system will go a long way to prevent heat induced pot leaf desiccation or marijuana leaf margin curling. One short episode of high heat is enough to permanently disable or destroy leaf tissue and cause a general decline in the leaves affected, which often occurs to leaves found at the top of the cannabis plant. The damaged pot leaf (usually) does not fully recover, no matter what you do. Bummer in the summer. One can only look to new growth for indications that the problem has been corrected.

1. Too much light
   Yes, it’s true, you can give your marijuana plant too much light. Cannabis does not receive full sun from sunrise to sunset in its natural state. It is shaded or given reduced light levels because of adjacent plant material, cloudy conditions, rain, dust, twilight periods in the morning and late afternoon, and light intensity changes caused by a change in the seasons. Too much light mainly serves to bleach out and destroy chlorophyll as opposed to causing marijuana leaf cupping, but it often goes hand-in-hand with high heat for indoor marijuana growers. Turn down the time when the lights on in your marijuana grow room. If you're using a 24 hr cycle, turn it down to 20 hrs. Those on 18 - 6 marijuana growth cycle can turn their lights down two or three hours. Too much light can have many adverse effects on marijuana plants. Concentrate on developing/maintaining an efficient and robust root system.

1. Over Watering
   For marijuana growers using soil, this practice only serves to weaken the root system by depriving the roots of proper gas exchange. The marijuana plants roots are not getting enough oxygen which creates an anerobic condition inducing root rot and root decline with the end result showing up as leaf stress, stunted growth, and in severe cases, death. Over watering creates a perfect environment for damp-off disease, at, or below the soil line. Many times marijuana growers believe their cannabis plant is not getting enough marijuana fertilizers (which it can't under such adverse conditions), so they add more marijuana fertilizers. Making the problem worst. Not better. Often problem 1 and 4 go together. Too much marijuana fertilizer combined with too much water. Creating plenty of marijuana plant problems.

1. Not Enough Water
   Not only is the marijuana plant now stressed due to a low supply of adequate moisture, but carbohydrate production has been greatly compromised (screwed up). Step up the watering frequency, and if need be, organic marijuana growers may need to water from the bottom up until moisture levels reach a norm throughout the medium. One of the best methods in determining whether a marijuana plant requires watering is lifting the pots. The pots should be light to lift before a water session. After watering the marijuana plants lift the pots to get an understanding how heavy they've become fully watered. If the pot feels light to the lift - it’s time to water. Don’t wait until the soil pulls away from the side of the pot before watering. And of course, leach, once in a while to get rid of excess salts. These are the five most common problems marijuana growers encounter when growing cannabis. Correcting the problems early will save the marijuana plants, but may reduce overall yield. With practice and experience these problems are easily overcome which will then enable the marijuana grower to produce fantastic marijuana plants. With heavy yields.

 

[Growboy]

here is the stats for the last weeks
Week# Date system pH system PPM TopOff pH TopOff PPM W.Level Comments
1 6-Nov 5.6 500
7-Nov 5.6 510
8-Nov 5.6 490
9-Nov 5.8 510
10-Nov 5.8 490
11-Nov 5.9 470
12-Nov 5.9 470
2 13-Nov 6 470
14-Nov 6 460
15-Nov 6.1 450
16-Nov 6.2 420
17-Nov 6.5 390
18-Nov 6.5 360
19-Nov 6.7 350 changed system nutrents
3 20-Nov 6.3-6.1 450 Dropped pH
21-Nov 6.1-5.9 450 Dropped pH
22-Nov 5.9 470
23-Nov 5.8 460
24-Nov 5.8 460
25-Nov n/a n/a
26-Nov 5.7 470
4 27-Nov 5.7 480
28-Nov 5.7 510
29-Nov 5.5 560
30-Nov n/a n/a
1-Dec 5.9 640 Changed system nutrients
2-Dec 6.1 620 Added water to top off
3-Dec 6.2 590
5 4-Dec 6.2 560
5-Dec 6.3 510
6-Dec 6.3 510
7-Dec 6.1 470
8-Dec 5.9 470
9-Dec 5.9 470
10-Dec 5.8 450
6 11-Dec 5.5+5.6 430+550 Added 300ml booster
12-Dec 5.4+5.9 550+680 Added 250ml booster
13-Dec 6 660
14-Dec 6 660 Flushing do to deep Green and Clawing
15-Dec 6.1 190 5.9 120 12.5
16-Dec 5.7 190 6 120 10.5

 

[babyhughie586]

post some pics under normal lights... i cant tell anything by those pics....

what kind of booster are you using??? ive noticed in the past if you use certain boosters it will fuck up your ph and ppm

 

[Amber]

PH down is all bad if the ppms are raising.

 

[Amber]

How do your roots look and smell?

 

[Growboy]

i am using the cultured solutions line and my root system is ok they are white just not huge. I'll get some better shot up later tonight.

 

[Amber]

I usually figure clawing is due to nutes being too hot. Are you adding any boosters to the Cultured Solutions or are you using the CS bud booster only?

 

[Growboy]

As of right now I am flushing ppm are at 190 but when i do i only use CS

 

[DR.GT]

post pics in normal lighting, and of root zone also...

 

[Growboy]

NOT GOOD today specs 4.2 ppm 200 took up almost 2 inches pics soon

 

[SpiderKid]

 

[SpiderKid]

how many fan's do you have. ? are bringing fresh air into your space from outside.? what's the average humidity. on dec 1st before everything fell apart, did you dump everything and start fresh or just top off ?

 

[Growboy]

I dumped everything started fresh and humidity is 45% I cool the room with outside air. There are two fans in the room

 

[SpiderKid]

could the booster have been fucked up/ gone bad ? was everything going good before that , have you had a couple good runs with that system before this ?

i'd put 4 more fans in that room. every single leaf should be moving.

....Boundary layer – The boundary layer is a thin layer of still air hugging the surface of the leaf. This layer of air is not moving. For transpiration to occur, water vapor leaving the stomata must diffuse through this motionless layer to reach the atmosphere where the water vapor will be removed by moving air. The larger the boundary layer, the slower the rates of transpiration.....

http://passel.unl.edu/pages/informa...rmationmodule=1092853841&topicorder=6&maxto=8

 

[Papa]

i can't make out a damn thing from those pics, but your numbers and description suggest that you should drain your system and refill with just H2O. no more booster. they should recover in a few days. then feed with Bloom A&B only.

 

[Growboy]

here are new pics this is just water in system last couple days branches starting to fall now