Newbie Alert! - Problems - Nute Burn? deficiency? Phosphorus?

[welshgrow]

Hi guys I have a problem as you can see (pictures a few posts down) and I would really appreciate your advice.


Its super silver haze in week 7 of veg,
in special batmix soil
house and garden soil A&B nutes
Magne-cal
under 600W hps about 13"from the bulb.

Im thinking its nute burn even though I was only feeding them nutes every other watering and stuck to house and garden guidelines using a syringe to measure the stuff. It works out I was watering every 3 days so every 6 days they were getting nutes.

Im torn between nute burn and phosphorus deficiency.

Saying that its my first grow and first time on a forum so be gentle with me.

Peace

 

[c526]

Re: Newbie ALERT!! Problems, Nute burn? deficiency? phosphorus?

picture no worky

 

[welshgrow]

Re: Newbie ALERT!! Problems, Nute burn? deficiency? phosphorus?

Cant upload pics because im retarded...

 

[Richard Richardson]

Re: Newbie ALERT!! Problems, Nute burn? deficiency? phosphorus?

Hi Welshgrow, Welcome to

Photo Gallery Guide - How to Resize, Upload & Post Photos

How to Grow Marijuana - Everything You Need to Know!

 

[welshgrow]

Re: Newbie ALERT!! Problems, Nute burn? deficiency? phosphorus?

 

[welshgrow]

Re: Newbie ALERT!! Problems, Nute burn? deficiency? phosphorus?

Thanks for the greeting, forum virgin. lol

 

[c526]

Re: Newbie ALERT!! Problems, Nute burn? deficiency? phosphorus?

what's the water ph?? does not look like nute burn to me
looks like phosphorus, being locked out

what's in the batmix soil??

 

[welshgrow]

Re: Newbie ALERT!! Problems, Nute burn? deficiency? phosphorus?

The local tap water is ph 8 but I bring it down when I add nutes. Theres NPK fertilizer in the batmix, including bat guano. Theres some phosphorus in the magne-cal. Maybe I should give it a dose of that tonight? I already flushed her. Only one of the 4 plants suffering. confused a bit...

 

[Le Roi]

Hi Guys really need help fast as my 7 week old auto flowering plan has just gone very wierd very fast. Leaves curling inwards from the sides and dark brown lines on leaves, im a beginner and dont know what to do..I have checked out many sites and didnt find any similar fotos even on this site so ppplllleeeaaaasseeee someone help..
Tried for the last half hour to upload pics so hope it works.
Muchos gracias
Le Roi

 

[Lady Cannafan]

Hi Guys really need help fast as my 7 week old auto flowering plan has just gone very wierd very fast. Leaves curling inwards from the sides and dark brown lines on leaves, im a beginner and dont know what to do..I have checked out many sites and didnt find any similar fotos even on this site so ppplllleeeaaaasseeee someone help..
Tried for the last half hour to upload pics so hope it works.
Muchos gracias
Le Roi

Hi Le Roi,
your picture is not coming through. Here's some areas for you on how to get some help:
you can post your question in the FAQ's section where most growers look to see if people need help:

Frequently Asked Questions

If you are not sure what to ask or say here's another good link on how to ask for grow support:

How to Ask for Grow Support

And here's a how to on uploading pictures:
Photo Gallery Guide - How to Resize, Upload & Post Photos

If we can get you to the right area with some pictures or a picture and some grow information, I'm sure you can get some answers soon!

Hope this helps!

 

[KingJohnC]

Your photograph appears to show a phosphorous deficiency. I would try to flush your pots with at least twice the volume of pH adjusted water as pot size. When I flush my pots I use a milk crate in the bathtub to place the pot on. What is the N-P-K rating of your fertilizer? You want pH 5.8 for hydroponic and soiless (peat moss and coco coir) and pH 6.5 for soil.

here is a nutrient availability chart

here is a cannabis leaf deficiency chart

here is the Cannabis Plant and Pest Problem Solver and the Plant Abuse Chart

Cannabis Plant and Pest Problem Solver - Pictorial

Plant Abuse Chart

 

[welshgrow]

Firstly, Thanks for the reply!!! Had a poor sleep last night lol

I have had a suspicion that the soil I'm using is too acidic, had earlier calcium and mag deficiency which was fixed with plant magics magne-cal. This also has phosphorus in it but I'm seeing from your very helpful chart that if the soil is too acidic it's no good as it wo t be absorbed. HAS A PH OF 6.4... Any good?

the medium I'm using - House & Garden Batmix - Green's Horticulture


I flushed the worst if the 4 plants yesterday to see if it makes and difference hard to tell yet if its helped. Once I flushed it with ph 8 water I tested the run off water with a good electronic wand and it showed ph7. Then I added a little magne cal for a phosphorus boost.

Is there something I should buy to help? Is there enough phosphorus in the 'plant magic magne cal'?

Thanks in advance for your time.

Peace x

 

[KingJohnC]

You should feed nutrients every time you water. I believe that by alternating water and feed this is why you have a deficiency. You want to adjust your nutrient mixture to pH 6.5 for soil

 

[welshgrow]

You should feed nutrients every time you water. I believe that by alternating water and feed this is why you have a deficiency. You want to adjust your nutrient mixture to pH 6.5 for soil

Nutes every time you say? I wont argue with you mate you clearly have a better idea than I!!

I have just bought some trace nutrients from a hydro store, guy said he wasn't 100% sure it was phosphorus so I'd better cover all my bases. The option he recommended was cheaper so not trying to rip me off.

I have just given them the dose and I will be back with the results.

Going forward I will give nutes with every watering, maybe a lower dose? what you think?

peace

 

[KingJohnC]

Can you see any yellowing or browning tips on the healthy leaves? Yellowing and browning tips on leaves is a sign of nutrient burn. I do not see any nutrient burn on the photographs you provided but would need to see more clear photographs of the tips of your healthy leaves. If you do not find any nutrient burned tips on your plant then I would continue to feed your plants the same amount of nutrients every watering. What is the name of the trace nutrients you purchased?

 

[yuyo]

as you can see in the graph phosphorus is absorbed best at ph 6.5 and up in soil
if your runoff ph is 7 after putting in 8 that implies a soil ph of 6.0ish
what are your temps at the canopy level?
i have never used a 600 w hps and was wondering if 13 inches is about right,
some of those leaves seem light or heat stressed
kingjohn is far superior to me in knowledge so i will just wish you ...good luck and take care

 

[welshgrow]

as you can see in the graph phosphorus is absorbed best at ph 6.5 and up in soil
if your runoff ph is 7 after putting in 8 that implies a soil ph of 6.0ish
what are your temps at the canopy level?
i have never used a 600 w hps and was wondering if 13 inches is about right,
some of those leaves seem light or heat stressed
kingjohn is far superior to me in knowledge so i will just wish you ...good luck and take care

6 sounds a little low I know. When bought it should be 6.4.

At canopy level the temp is 28-29deg cel on and 18.5 during night. Rh is 45/50.

Been having a debate in my head about the distance of the 600W. They only been on for a week to get ready for flower. Done the 'back of the hand test at 10" and was fine but giving them an extra few inch's to be sure.

the brand of trace elements I bought should sort it or so I'm told but I won't know the reason due to the fact I'm just adding a load if trace elements. Saying that I'm 95% sure it's phosphorus.

 

[welshgrow]

I'm pretty convinced its phosphorus too mate. I hope so because I've just given them a half dose of my usual nutes, (house and garden soil A &B) and half dose of Canna trace elements. Make or break I suppose...

 

[welshgrow]

Just want to say thanks for all the input guys. After about 6 hours if looking at different deficiencies I was still only half sure it was phosphorus, this thread helped calm my nerves lol.

Peace and love to you all

 

[welshgrow]

so I've come home and due to the dark rings around the now dead spots on the plants im thinking it could be a calcium deficiency.

Ive added the trace mix but was going to add the Magne-cal I have when I spotted this...

This mineral fertiliser contains various trace elements (0.06% Fe (containing the organic layers DTPA&EDDHA which prevent oxidation), 0.07% Mo, 0.06% Cu, 0.6% Mn, 0.3% B and 0.3% Zn).

Trace elements are essential for the plants. They are used by several enzyme systems. This means they affect the energy balance, the overall development of the plant and the microscopic processes in the plant.

With the exception of fertilisers containing concentrated calcium, liquid trace element mix can be combined with most fertilisers. The plant can immediately absorb liquid trace element mix.

Application
-To be applied in the case of a trace element deficiency.
-As a supplementary remedy to stimulate the growth and bloom.

Dosage

Dilute 10-20 ml concentrate per 10 litre of water (1:1000/1:500).


Can anyone advise if its ok to add Magne-Cal to this supplement... im guessing NO but thought id ask, cant find anything online...