Burned 'em, then compounded the problem with the Sea Crop and silica. It's probably not worth trying to salvage them, hard as that is to accept sometimes.
My plants are dying and no one knows why. I need help!
- Thread starter Thread starter bili_isiro
- Start date Start date
I do not see evidence of fungal disease.
1. I'm not an expert on sealed growrooms yet.
2. The output of the EC is high and suggests a buildup of unused nutrients in the coco coir. Which would suggest this is the reason the plants look crispy. Reduce the EC to 1.0 max during vegging. Also, if you're using coco coir (bagged), you should also start with coco specific nutrients - Canna, Plagron, Biobizz.
3. The humidity is relatively high, and may be interfering with the respiration of the plant.
4. Watering once a day is way too often. Only water when the coco coir is dry in the morning.
5. The pots are too small. 1 gallon per expected foot of growth, minimum. If it's 5 feet, that's 5 gallons minimum.
So in short: less frequent watering, lower EC, bigger pots, using different coco specific nutrients. Also bagged coir has much fewer issues than bricks.
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Nutty sKunK
Active member
I’m not a coco grower but points 4 and 5 are wrong.
You don’t let coco dry out. You feed multiple times a day in short amounts. Keeping the substrate moist, never wet/dry.
That 1 gallon for a foot of plant is soil/peat based mediums.
You can grow a large plant in a gallon of coco…
Your points are incorrect.
I'm not recommending anything I haven't used for years.
And if you tried growing in coco, you'd find the same thing.
Would be my take as well.. too much of everything and i‘d forget about supplementing CO2, turn the vent back on. CO2 will really only do you any good if all other parameters are perfect.
If You’re just getting into growing do a couple easy runs first to get a feeling for the plants, Medium, feedings etc…
All th best amigo
Cc
If You’re just getting into growing do a couple easy runs first to get a feeling for the plants, Medium, feedings etc…
All th best amigo
Cc
To high feed and not frequent enough and mixing different plant foods and growing methods, what could possibly go wrong?
Stick with one method starting out and don't do the kitchen sink approach, less is more growing Cannabis.
Listen to experienced growers with results that reflect their words and throw any nutrient schedule you got from any manufacturer out the window that only want you to overfeed and fail for profit.
Stick with one method starting out and don't do the kitchen sink approach, less is more growing Cannabis.
Listen to experienced growers with results that reflect their words and throw any nutrient schedule you got from any manufacturer out the window that only want you to overfeed and fail for profit.
Pots should never ever go dry in a hydroponic medium ie Coco Coir, rockwool etc. Coco coir holds 22% oxygen att FULL saturation, you replenish and remove the off gases and add oxygen with every feeding in hydro.
I feed 4x a day in veg and never let the surface of the pots dry out. The only thing you do by drying out the medium is causing heavy EC spikes, salt buildup and pH being out of range.
Nutty sKunK
Active member
My points aren’t incorrect at all. You don’t do dry backs in coco and you can get bigger plants in the same amount of media vs soil
This is what happens when you let the top of the coco coir get dry before you water/feed again.
Coco is a medium that stands on the cusp of soil and hydro. It has the benefits and limitations of soil, and the nutrients and near pH of hydro.
The principles of soil remain the same - if you're using a single medium, you have to provide water, food and air to the plant's roots. And the only way to do that is to allow the top of the coco to get dry before you water again.
That doesn't mean the entire pot is dry. It means that most of the moisture has evaporated and is no longer making it to the surface.
Because nutrients concentrate when the soil dries, you use a lower nutrient concentration. 1.0 EC for vegging is plenty of nutrients, especially when the pots are large enough.
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did AI ask you if you have an ec/ppm meter?
ps
whenever see necrosis first I think ...----->russets mites
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Nutty sKunK
Active member
Well there’s the misleading part of the internet. So only the top is dry? I thought u meant the whole pot drying out!
Frankly, that doesn't matter that much either. As long as the air is humid, it takes a long time for the plant to start to wilt.
However, waiting for the top of the soil to be dry before watering agains is a good rule of thumb.
