Leaves turn yellow at the bottom.

[nickerelli]

Hi everyone,
My breed is 5 weeks old and now the leaves are starting to get yellow at the bottom.
I will post pictures tomorrow.

What is your experience level? (first timer, novice, experienced...)
first timer

Your Equipment:
.1) Type and wattage of lights. (MH, HPS, CFL's, tube fluorescents, LED's)
Hps 600w
.2) Distance from tops?
50cm
.3) Reflector type? (cool tube set-up, bat wing, enclosed reflector, bare bulb...)
Wing reflector
.4) Is there a consistent fresh air supply?
Yes
.5) Do you have an exhaust fan and a circulation fan?
Have 2 small and 1 normaal size
.6) What are the bulb wattages, kelvin ratings, and schedule?
Dont now what you mean here :-(

Your medium:
.7) Specific brand and type of soil, (coco, peat based soilless...) and anything you've added to it. (vermiculite, perlite, worm castings...)
Bio grow mix, brand is atami
.8) Size of container.
11L


Your nutrients and water:
.9) Source of water. (tap or filtered) What's it's ph?
Tap and ph is between 5,8 and 6,2
10) Method of checking water ph. (ph pen, test strips, aquarium test kit...)
Ph pen and i calibrate it once a week
11) Method of adjusting water ph. (phosphoric acid, white vinegar, hydrated lime, PH Up...)
Phosphoric acid
12) Specific brand and N-P-K ratio for each bottle. List dosages (quantity per gallon) and current feeding schedule.
I use everything of canna, and feedinglist of canna
Terra flores i give 50ml on 10L of water
Cannazym 25ml on 10L
Rhizotonic 5ml on 10L
Boost 20ml on10L
I will start tomorrow with pk 13/14, 15ml on 10L

13) How often are you watering between feedings, and how much per watering?
I give 400ml each day
14) Any additives or tea's? (Superthrive, CalMag, molasses, Mother's Earth...)
No
15) Are your ph levels stable, or do they fluctuate?
I think stable
16) What is your ingoing water's ph? ...your runoff ph?
Ph is between 5,8 and 6,2
17) Do you foliar feed? If so, with what, how often, and at what time do you spray?
No
Your growroom:
18) Indoors or outdoors?
Indoors
19) What size of closet, room or hut?
Tent of 3m wide, 2high and 1,80
20) What are the temps and humidity levels while lights are on? ...With lights off?
Lights on 26 and lights of 21
21) Have you seen signs of insects in the growroom?
No

Your strain:
22) What strain are you growing? (Indica dominate or Sativa dom?)
Indica
23) Is this an photoperiod strain?
?
24) How old is the plant? 5 weeks
25) In what life-cycle is it? Vegetative, pre-flowering, flowering, rippening?
I think pre flowering
26) From seeds or clones?
Seeds

Hope that someone can help me
Thx

 

[redevil]

don't take this as gospel but i think that is a classic sign of nute lack specifically nitrogen

It is suggested that while making the transition fron veg to flowering you should still use veg nutes as well, in early flowering your plant still wants to grow and flower nutes tens to have lower nitrogen that veg nutes

So for example

Veg nutes 1/4
Veg nutes 1/2
veg nutes 1/4 flower nutes 1/4
Flower nutes 1/2

 

[namvet25]

Need some pictures.

 

[Muddy]

Right off the bat I see two problems. One, you're watering too often. Daily watering is a big no no. Get a feel for your pots when they are almost completely dry and only water them again when they feel that way. That may only be every 3-4 days, longer when the plants are small. Two, your pH is off and is the likely culprit. Your run off pH should be between 6.2 - 6.4. Too low and it can cause nutrients to be locked out and cause the yellowing you described. Once you get some pics up we can verify that.

 

[The Squid]

Your run off pH should be between 6.2 - 6.4. Too low and it can cause nutrients to be locked out and cause the yellowing you described. Once you get some pics up we can verify that.

He's using coco/peat based mix, wouldn't 5.8-6.2 be fine? I thought that was the case with mixes like that and Promix. Honestly I see several different people using several different Ph zones for their grows and all having success.

My grows started getting a lot better when I lowered my Promix feed and runoffs to the high 5's. Just a thought. I know you know best, Mud Man.

 

[Muddy]

That's a semi soil less mix since it contains peat and worm casting, not a true coco mix, so should do better with a slightly higher pH, especially if showing lockout. In my experience low 6s are best for Pro Mix. I've tried running it at 5.8 and had severe lockout issues.

He's using coco/peat based mix, wouldn't 5.8-6.2 be fine? I thought that was the case with mixes like that and Promix. Honestly I see several different people using several different Ph zones for their grows and all having success.

My grows started getting a lot better when I lowered my Promix feed and runoffs to the high 5's. Just a thought. I know you know best, Mud Man.

 

[The Squid]

Gotcha, that's the only think I could think would change it; the worm castings. Thanks for clarifying.

 

[nickerelli]

Thx to all for the reply :buds:
I will place some pics tomorrow.
I also think that i have a nitrogin problem but i'm not sure offcourse
I will set my ph between 6,2 and 6,4.
About watering to much, i have a pen that i need to put in de soil and pen always says dry. After i water the plants the pen says moist or wet.
To be sure that the soil is dry i put my finger in soil and the soil feels dry.

 

[Muddy]

Those pens are not always very accurate. Learn to do it by weight as I suggested, that's the best way. Even the finger method isn't accurate as the soil can be dry 2" down but the roots can still be very moist. MJ likes wet/dry cycles. Too much water will cut off the oxygen to the roots and the plants will start to look wilted.

 

[nickerelli]

Is it neccesary to change the hours of light with autoflower or is it ok to give it always 18hours of light and 6 dark true the whole breed?
Is it ok that i start within 2days with pk 13/14?
Sorry if i dont wright the english perfect but i from belgium.