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I can't find a solution!! Help me please :)


New Member
I have "drip" system but my cannabis plants yellow on top (all plants )
and growth slows down! and one stopped completely in growth

i dont know who is the problem :( to look for a solution online
and read what may be the problem
and read it epson salt good for this problem (sulfur deficiency) but no help me :(

I don't know what the problem

could someone help me?

seed : serious seeds - Chronic
Plants: 3 week
Use ro water
Tank: air pump -13L/min
Nutrient :
Hesi PRO-Line Hydro Growth

Guaranteed Organic Content: Nitrogen (N): 23%; Phosphorus (P2O5): 24%; Potassium (K2O): 29%;
It also contains: magnesium, calcium, sulfate, iron, manganese, zinc, copper, boron, molybdenum, cobalt, B1, B2, B6, B12, vegetable sugars and amino acids.
PH: 5,5 -6,1
Ec :1000-1200
light : 250w HID 17/7
growth room : 21-25 Celsius
Water : 23-26 Celsius
Root : Strong,white and it looks good :)
Watering system : 15min on 45 min off

there are no parasites..


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Well-Known Member
Hiya @jejukkoo I'm clueless on hydro but those plants look pretty nice to me, new growth green? Maybe dial your nutes back a bit?

Lets get some big pot brains in here eh? I know @West Hippie has awesome hydro grows going, @Guy Cavallero does water...many others but those two pop into my tired out little bean atm.

Cheers to you, GL on your grow...hydro advice to follow soon! :yahoo:


Well-Known Member
Looks like it may be a zinc deficiency.


Well-Known Member
With a cannabis zinc deficiency, younger leaves start yellowing in between the veins. Leaf tips get discolored and start dying. the leaves may take on a unique banded appearance and the plant may stop growing vertically. There may be much less space between new nodes, which can cause new leaves to start bunching together. If the plant is budding, its flowers may stop growing or even start dying if the problem isn't corrected.


Well-Known Member
Sometimes a cannabis zinc deficiency (like all deficiencies) can be triggered by stressful conditions and may clear up on its own after the period of stress is over. However, to minimize damage it's important to react to any growing problem as quickly as possible, especially in the flowering stage.
1.) Adjust pH to Correct Range
The most common reason growers will see a zinc deficiency is when the pH at the roots is too high. Zinc tends to get locked at at higher pH levels, and is better absorbed by the plant in a more acidic root environment.
If you suspect your growing cannabis plant has a zinc deficiency due to too-high pH, flush your system with clean, pH'd water. This will remove any nutrient salts that may be affecting the uptake of zinc and help restore pH to the proper levels..
  • In soil, zinc is best absorbed by the roots in the 6.0 – 6.5 pH range (although it's generally recommended for soil growers to keep pH in the 6.0-7.0 range, zinc tends to be absorbed better on the lower side)
  • In hydro, zinc is best absorbed by the roots in the 5.5 – 6.0 pH range (although it's generally recommended for hydro growers to keep pH in the 5.5-6.5 range, zinc tends to be absorbed better on the lower side)

2.) Give the Right Nutrients
The truth is, most cannabis growers don't need to add more zinc in response to a zinc deficiency!
In fact, most growers have actually already given plenty of zinc to their cannabis plants since it is found abundantly in most tap water. If you're using quality soil or cannabis-friendly nutrients, you probably don't need to worry about adding more zinc. In general, zinc deficiencies are more likely to appear when a grower is using heavily filtered or reverse osmisis (RO) water to feed plants since any zinc has been removed, but pH is a much more common reason growers see zinc deficiencies in their cannabis plants.

3.) Take Good Care of the Roots
Zinc deficiencies can show up with the plant is having root problems or if the plant is overwatered, even if the pH is right and the zinc is there. Proper watering practices help plants grow healthy and avoid a host of problems!

4.) Watch for Recovery
After going through all the above steps, watch to make sure that the zinc deficiency starts to clear up within a few days to a week or so. The damaged leaves may not recover completely, but you know you're in the clear when you stop seeing symptoms on new leaves.

West Hippie

Well-Known Member
Backlipslide has this covered ! Plants are small yet may also in #3 overwater . I know it’s going to be the same but water every two hours for 30 minutes, gives the young roots time to dry out. As you grow adjust to the 15/45 .

West Hippie

Well-Known Member
thank you for your help to everyone :5:

1: flushed the system tap water
2 :my tank 10liter use 8l ro water and 2 l tap water
3 give my nutrient and now EC: 900
4: ph 5.8
I wait 2-3 days and write what changed

Thanks for the help!!!! :thumb::circle-of-love::adore:
Why don’t you start a journal with 420 magazine! Perfect timing with that grow !
On my post is a link for new members below click on it to learn how to do that journal!
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