Newbie need help diagnosing problem - Thanks in advance

M

Mahawka

Active Member
Hi all,

I am trying confirm what type problem I am having. However, I am unable to come to a conclusion.
I was hopping the community could give me a hand.

This plant was started as a clone. The seller told me it's a grapefruit cheese.
New growth is showing similar problems on the first 3mm on the tip. Lower foliage is worst.

My environment.

Temp - 70 to 79 degrees.
Method - DWC
PH - constant 5.8 (reliable)
Nutrient - Lucas formula 0-8-16 ~950ppm
Lights - HLG 260 v2 , 18 on 6 off

My best guess is a cal mag problem. It will be greatly appreciated if i can get some advice
 

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snoeman032

snoeman032

Well-Known Member
Cal mag wouldn’t hurt. I tried it before switching and it didn’t fix mine but I kept running cal mag after I switched my water
 
Kushash

Kushash

Well-Known Member
Mahawka said:
Hi all,

I am trying confirm what type problem I am having. However, I am unable to come to a conclusion.
I was hopping the community could give me a hand.

This plant was started as a clone. The seller told me it's a grapefruit cheese.
New growth is showing similar problems on the first 3mm on the tip. Lower foliage is worst.

My environment.

Temp - 70 to 79 degrees.
Method - DWC
PH - constant 5.8 (reliable)
Nutrient - Lucas formula 0-8-16 ~950ppm
Lights - HLG 260 v2 , 18 on 6 off

My best guess is a cal mag problem. It will be greatly appreciated if i can get some advice
Click to expand...
This thread should be in the plant problem section.

I'm a soil grower so take this with a grain of salt.

Where is the Nitrogen?
Doesn't seem like a complete formula to feed.
950ppms seems way to high.
Not sure a constant 5.8 PH is good.
You will eventually get some full time DWC growers to help.
Good Luck!
 
Sleazyb

Sleazyb

Well-Known Member
Looks like they have been over watered to me and that is causing weird symptoms for you. I'd try to give them more dry time first .
 
O

Octastich

Active Member
that's normally for a calcium deficiency. red on the top sides of the leafs stem and brown spots
looks like the start of some tip burn
low humidity or transpiration could cause that

you need to be using a two part base nutrient or a 3 part micro grow bloom. your plant is not getting a good ratio of npk

you are in veg you should be using equal parts micro and grow and half bloom. if you are using GH Flora series that's meant to be a 3 part

if i was to be mixing with them nutrients i would be using 1ml of micro 1ml of grow and half a ml of bloom plus 1 ml of cal mag per letter of water ruffly id be aiming for no more then 450ppm for that size plant.

have you had a look at your roots recently. are they healthy or brown or badly discolored. no slime or bad smell
 
O

Octastich

Active Member
https://hydroponic.co.za/hydroponics-quickstart/lucas-formula/

is that's the artificial you are referring your information from

i cant exactly disagree because i haven't tested it but not using grow would mean you are missing out of macro nutrients that are not in the micro or bloom. sure it may have enough nitrogen in it to support a plant but not all the rest that's needed

if you want to be cheap you will get shit in return. use the correct nutrients
 
M

Mahawka

Active Member
Octastich said:
that's normally for a calcium deficiency. red on the top sides of the leafs stem and brown spots
looks like the start of some tip burn
low humidity or transpiration could cause that

you need to be using a two part base nutrient or a 3 part micro grow bloom. your plant is not getting a good ratio of npk

you are in veg you should be using equal parts micro and grow and half bloom. if you are using GH Flora series that's meant to be a 3 part

if i was to be mixing with them nutrients i would be using 1ml of micro 1ml of grow and half a ml of bloom plus 1 ml of cal mag per letter of water ruffly id be aiming for no more then 450ppm for that size plant.

have you had a look at your roots recently. are they healthy or brown or badly discolored. no slime or bad smell
Click to expand...
Thanks for your response. Roots are looking perfect.

From my research I do agree with you on the calcium deficiency. However, I also believe that my deficiency is not due to a lack of calcium in the water but an excess potassium causing a lock out.

As pointed out by xtsho 950ppm seems high for such a small plant. I think my course of action is to reduce my formula to something more suitable like 650 ppm and monitor the problem. What do you think ?
 
O

Octastich

Active Member
Mahawka said:
Thanks for your response. Roots are looking perfect.

From my research I do agree with you on the calcium deficiency. However, I also believe that my deficiency is not due to a lack of calcium in the water but an excess potassium causing a lock out.

As pointed out by xtsho 950ppm seems high for such a small plant. I think my course of action is to reduce my formula to something more suitable like 650 ppm and monitor the problem. What do you think ?
Click to expand...
problem is ppm is a bad way to discuss concentration but yes id drop it. yeah na that's nothing to do with potassium but i could be wrong.

i think you are just feeding wrong. don't get so hung up with the numbers on the bottles. you are not trying to match them as in 5.5.5

equal parts of each at half the suggested ml the bottle says will do. if you're not going to use your nutrients how the manufacture wants then to be used then expect deficiency

using base nutrients shouldn't be complicated
 
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