The UK Growers Thread!

speedwell68

speedwell68

Well-Known Member
samtheman08 said:
Why am I getting brown spots ?
i have no bugs/pests
Ph is perfect 6.4
Humidity is 55%
Temps are 26 degrees Celsius

light was closer but I moved them higher do you think the light being close cause it ?


help!
It happened on my last grow too
But I had 556g from 4 plants under a viparspectra xs4000 and it was amazing weed.
I’m using the same light but I’ve added Mars sp150 and a viparspectra p600 for extra watts.

apart from the brown spots they are growing really fast I notice it daily and how fat they’re getting. The one furthest along is only 4 weeks in flower I think possibly 5 weeks. Hairs are mostly white still
And very thick so I guess she’s got a while yet.
The trichomes are a really nice purple pink.
obviously they’re clear this early on but it’ll look amazing seeing the cloudy pink amber I’ve never had that before

they are all purple punch autos by fast buds
Apart from the smallest one that’s a green crack.

Ive grown as a hobbyist and for personal use for many years I have good knowledge and get good yeilds.


thanks in advance
Click to expand...
It looks like Calcium deficiency to me. I have had issues with it. I think it has something to do with LED lighting, but can't be sure. From what I understand if the plant is showing the deficiency now that means it actually became deficient a few weeks prior.

My plan to fix it on my next grow is to use a little Calcium Chloride on a weekly basis from the start of flowering, my thinking is prevention. According to my water company there is very little natural Calcium in my tap water and the plants obviously need it, so it makes sense to give them a little.

Calcium Chloride is super cheap, water soluble and directly available to the plant.

What medium are they in and what are you feeding them?
 
jondamon

jondamon

Well-Known Member
speedwell68 said:
It looks like Calcium deficiency to me. I have had issues with it. I think it has something to do with LED lighting, but can't be sure. From what I understand if the plant is showing the deficiency now that means it actually became deficient a few weeks prior.

My plan to fix it on my next grow is to use a little Calcium Chloride on a weekly basis from the start of flowering, my thinking is prevention. According to my water company there is very little natural Calcium in my tap water and the plants obviously need it, so it makes sense to give them a little.

Calcium Chloride is super cheap, water soluble and directly available to the plant.

What medium are they in and what are you feeding them?
Click to expand...
Those spots aren’t Ca def unfortunately Speedy.

Ca def spots begin as pale white/yellow blemishes that then develop into more uniform red dots.

Edit

I know because I used to suffer it for a long time as my source water has very little Ca in it thanks to living in wales lol.

i now use soft water nutes and add additional Calmag to combat it.

Although I run very weak nutrients compared to some others using coco which could have exacerbated the problem but anytime i increase my input feed above 1.5 I get tip burn followed by other issues.
 
samtheman08

samtheman08

Well-Known Member
jondamon said:
You’re using bottled water?

you do realise this usually has a fair amount of salt in it.

do you know what it’s EC is?
Click to expand...
Yes EC is electrical charge/conductivity the higher the salt the higher the reading via EC pen.

it’s not a cheap pen I use either it’s blue lab…

i use normal amount of cal mag throughout feed until flower than I use half the amount.I’ve only ever started using cal mag last few grows before this i was using organic amendments which just stank so needed a change. I’ve never had a big problem with growing.

bottles water yes salt content (sodium)can be high but I adjust this accordingly flushing with a ph adjusted tap water.

what stupid mistake am I doing ?
 
speedwell68

speedwell68

Well-Known Member
jondamon said:
Those spots aren’t Ca def unfortunately Speedy.

Ca def spots begin as pale white/yellow blemishes that then develop into more uniform red dots.

Edit

I know because I used to suffer it for a long time as my source water has very little Ca in it thanks to living in wales lol.

i now use soft water nutes and add additional Calmag to combat it.

Although I run very weak nutrients compared to some others using coco which could have exacerbated the problem but anytime i increase my input feed above 1.5 I get tip burn followed by other issues.
Click to expand...
I was looking at this pic...
Untitled.jpg
Is that not Ca def?
 
jondamon

jondamon

Well-Known Member
samtheman08 said:
Yes EC is electrical charge/conductivity the higher the salt the higher the reading via EC pen.

it’s not a cheap pen I use either it’s blue lab…

i use normal amount of cal mag throughout feed until flower than I use half the amount.I’ve only ever started using cal mag last few grows before this i was using organic amendments which just stank so needed a change. I’ve never had a big problem with growing.

bottles water yes salt content (sodium)can be high but I adjust this accordingly flushing with a ph adjusted tap water.

what stupid mistake am I doing ?
Click to expand...
Using bottled water imo is a no no.

What’s your tap water like?

Also chlorine is an immobile nutrient that is used by plants.

could be your seeing issues with Chlorine availability.
 
samtheman08

samtheman08

Well-Known Member
speedwell68 said:
It looks like Calcium deficiency to me. I have had issues with it. I think it has something to do with LED lighting, but can't be sure. From what I understand if the plant is showing the deficiency now that means it actually became deficient a few weeks prior.

My plan to fix it on my next grow is to use a little Calcium Chloride on a weekly basis from the start of flowering, my thinking is prevention. According to my water company there is very little natural Calcium in my tap water and the plants obviously need it, so it makes sense to give them a little.

Calcium Chloride is super cheap, water soluble and directly available to the plant.

What medium are they in and what are you feeding them?
Click to expand...
 

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samtheman08

samtheman08

Well-Known Member
jondamon said:
Using bottled water imo is a no no.

What’s your tap water like?

Also chlorine is an immobile nutrient that is used by plants.

could be your seeing issues with Chlorine availability.
Click to expand...
I’ll just use tap water it’s not too bad tbh 7.5 ph is what it comes out as it’s medium/hard water around here.
 
jondamon

jondamon

Well-Known Member
Another thing Sam.

around week 6 of flower I tend to start backing off my nutes as the plants tend to use less nutrients the closer to finishing they get.

You’re using Terra nutes so I’m assuming you’re in soil?
 
samtheman08

samtheman08

Well-Known Member
jondamon said:
Using bottled water imo is a no no.

What’s your tap water like?

Also chlorine is an immobile nutrient that is used by plants.

could be your seeing issues with Chlorine availability.
Click to expand...
I’ll just use tap water it’s not too bad tbh
jondamon said:
Another thing Sam.

around week 6 of flower I tend to start backing off my nutes as the plants tend to use less nutrients the closer to finishing they get.

You’re using Terra nutes so I’m assuming you’re in soil?
Click to expand...
yeah canna terra professional plus. As soon as 6 week flower mark hits I’m flushing Or atleast introducing it. I found under led they are flowering faster than under hps. Best thing I’ve invested in.
 
jondamon

jondamon

Well-Known Member
samtheman08 said:
I’ll just use tap water it’s not too bad tbh

yeah canna terra professional plus. As soon as 6 week flower mark hits I’m flushing Or atleast introducing it. I found under led they are flowering faster than under hps. Best thing I’ve invested in.
Click to expand...
What’s the EC of your tap water?
 
jondamon

jondamon

Well-Known Member
speedwell68 said:
Sorry, for some reason it didn't add the pic. Fixed it now.
Click to expand...
Sorry speedy I can’t find any of my own I’m thinking I may have posted them in someone else’s thread when trying to show them the beginning and progression of Ca def.

let me try searching for myself and then I’ll see what comes up.
 
jondamon

jondamon

Well-Known Member
This is the best I could find @speedwell68 if you look at the pale dots they become red dots, then the leaf begins to yellow off and become necrotic.
99B113FA-EC76-497D-8908-4FE18F63A1DD.jpeg

As it progresses it yellows off like Mg def symptoms but without the interveinal chlorosis.
 
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