Hey guys! Anybody recognise any deficiencies? I got problem at start with pH but I fixed it last week. But I cannot revive her, she is not growing too much tho. I am usink NPK 1-3-1 from Atami. Temps, humidity are constant.
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What week are you on
It will be 5th week.
Overwatering
Yeah definitely over watered, a plant that size will do well with roughly 80-100 ml of water. If you have a syringe it’s best at that age. Pour it slowly around the base of the stalk in the size of a silver dollar so the water travels downwards encouraging the roots to do the same. @Tomy
Thanks guys, but I think it is definitely not overwatered. I am giving her exactly 50ml of water I tried to lower it some time ago and she almost died. She lost two oldest leaves because of dryness.
Do you have more information? It could be a light issue being too close to the plant. I don’t think overwatering is the issue here if you’re watering with only 50ml, what the humidity at?
Dear @NicoZ, I use OPTIC 1 COB LED 3500k at 75cm height.
I tought it could be iron deficiency, but veins on new leaves are yellow as well. I am using pH 7.3 water and got 5.6 runoff so it should not be it (what I read it happens on pH 6.5 and up). I tried to flush by pH 6.4 and got 6.3 runoff PPM lowered from 1500 to 300 yesterday no change.
Temps are 25C and humidity 50%.
I got another 2 girls starting to show the same symptoms. I am starting to be desperated…
It seems an issue with the light then. As you said, she is not growing too much.
I’ve checked for your light and it is a 54w light. 75cm is too far from the plant, and the light power is not enough even for her to stretch and search for it.
Lower your light to 20cm and give it a day or two and let me know how it went.
Thanks @NicoZ will try to lower the light and will report later. I set it on that height because of light manufacturer references because it uses CREE XLamp® CXB-3590 led, they said it should be powerful enought… will see.
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I hope so, keep us posted
I think you’re just feeding before the plant is ready, or mature enough to deal with it. Usually, the soil will have enough nutrients in it to feed them for the first 3 to 4 weeks until it matures enough to start a feed regimen. You said the original runoff was 1500 ppm? That’s way too high for a seedling and it explains why one of the leaf tips looks as though it was burned.
Micronutrients are most likely being blocked due to some antagonistic relationship between nutrients somehow. When they’re blocked, the normal interactions of other nutrients are also blocked and you start to see deficiency indications that just don’t make any sense. Some nutrients react with each other in synergistic ways and others react with each other in antagonistic ways. Too much or not enough of one or many of them can lead to a rabbit hole of problems to work out as the plant show indications that aren’t actually the root cause of the problem.
I don’t think the light has been the problem. When there isn’t enough light or not the right type of light or not enough intensity, a seedling will stretch looking for it, not stay short because it isn’t close enough. Stunted growth from the light not being close enough would happen more in a mature plant.
The main purpose of photosynthesis is to convert radiant energy from light into chemical energy that can be used for food. If a plant is mature enough and there is plenty of chlorophyll in the leaves and not enough light to allow for optimal photosynthesis, the plant doesn’t grow as fast as it should and can just stop growing. If that happens the nutrients will not be taken up by the plant and will stay in the soil where they will build up as you continue to feed. The soil becomes hot and you start to get nute burns.
A seedling needs light in the 4000 to 6500 Kelvin color temperature range but it doesn’t yet need intense light. If there is a deficiency such as what yours are seemingly showing, chlorophyll isn’t being created, the leaf is yellowing and not able to use the light to create photosynthesis efficiently so it doesn’t grow even though the light being provided is of good quality. This also affects the plant’s ability to effectively produce cellular respiration because the stomata don’t function well on leaves that aren’t healthy. Getting the light closer won’t help until the deficiency is fixed. In fact, it could do more damage because it isn’t able to photosynthesis it into energy to grow.
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Wou! Thank you for a such a comprehensive message!
I can confirm, the light could make it even worse… I almost killed all my plants because of lowering the lights. It is really possible a nutrients could be blocked because of overfeeding as you wrote. But…
I have 4 new seedlings of Habanero with no feeding util now and they shows exactly same symptoms. Pale leaves and stopped growth. pH 6.4 same light. Watching the moisture with hygrometer. I tried iron and sulphur even in spray and no changes… What the hell is causing that problems!? I dont know 
that Habanero…
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I’m happy to help!
Mg and Phosphorus have a synergistic relationship that help to carry other nutrients, such as Calcium and Nitrogen throughout the plant. However, Mg is mobile so it would normally show signs of deficiency at the bottom and move up. Your habanero light colored leaves are at the top. That would suggest more of a N deficiency.
Tell me about the nutrients you use, your soil mix and your water in relation to using them for growing Cannabis.
What are the names of the nutrient blends you have available and their NPK?
Where is the soil from? Whats the mix? Is there any NPK rating on the bag?
Is your water from city tap? What temperature are you giving it to the plants?
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Great analyse about those Habaneros, I gave them little flush with Biobizz Bio Grow + ClaMag and they revived! Now they are growing like crazy! I use the same soil as on my girls which is BioBizz Light mix and it seems it is really low fed because of need of nutrients in that early stages…
I have available these feedings:
BioBizz Bio Grow NPK 4-3-6
Atami RootBastic NPK 4-14-4
Atami CalMag
Canna Mono Fe
Epsom salt
Dolomite lime
Soils:
BioBizz Light Mix
pH = 6,2 EC = 1,2
NPK: 133 - 201 - 365 (mg/l)
ATAMI Janeco Light mix
pH = 5.7 - 6,5 EC = under 1.0 - 1.2
NPK: 12-14-24
Water:
My tap water has pH 7.8 I always lowering it to 6.3 and 50ppm this is why I am adding CalMag.
I am watering when they soil is almost dried (got the hygrometer). It is roughly once every 3 - 4 days.
I use 120ml - 200ml of water for watering now (it is week for now) with 1ml/l of BioGrow and 0,5ml/l Mono Fe and 1ml/l of Atami CalMag
Plants are in stable 25C on day and 21C at night with constant RH of 62%.
I stabilised these numbers one week ago.
This is actual photo of my two girls suffering with the same symptoms.
Flushed them 3 days ago.
Thanks so much!
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Hi Tomy. Thanks for the details. I think you’re underfeeding and possibly under watering your girls. They appear to be pulling N from the leaves below to feed the top and the top leaves look a little like they are sort of thin and papery feeling. Do they feel that way to you?
Hi StickyBudHound and thank you for your suggestions! Actually they all feel like paper… I do not know if is it right because this is my first grow but the leaves feels kinda thin to me. Any thoughts for cure? They are right now really watered because of flush 3 days ago.
Yep, I was afraid they might be thin and papery. They should normally feel somewhat full, soft and subtle. The current problem is due to calcium not getting to the leaf to build up the chlorophyll. There needs to be a little P available to act as the catalyst for Mg to carry N and Ca to the leaves. While they’re still wet from flush, give them a feed with Mg, Ca, N, P and K. About 1/2 to 3/4 of the recommended of your veg nute and about 1/4 to 1/2 of the recommended flower nute. Include about 1 tsp per gallon of Epsom Salt.
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