Slow growing, drooping, curling darkish plants.

Hi, new here so i hope i present all the information needed in this start.

- Exactly 50 days in pots, started from seeds.

- Ph has been maintained throughout.

- Ec has been kept around 075, a few weeks just below 060 due to nitrogen deficiency suspicion.

- Temperatures have been maintained around 18-25 celsius in the cycle.

- Clay pebble hydroponics, first time to try this.

- Water changed weekly, 24h kleen first and hydroguard used in the new nutrient water.

-10ml silicone substance for every 30l water used throughout the grow.

For the first few weeks they grew astonishingly fast, then it just stopped and started to show all these symptoms. Sometimes they can be happy for a few days but then the new growth starts to curl and darken. What could cause this? Sorry if i left something out, ask and i will tell if needed.

Not sure been long time since I did hydro I think they could be thirsty droopy leafs usually a sign they look good no burn or owt just droopy, someone on here will be able to give you a more definite answer.

Madmike79 said:

Not sure been long time since I did hydro I think they could be thirsty droopy leafs usually a sign they look good no burn or owt just droopy, someone on here will be able to give you a more definite answer.

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They water automatically several times a day, 7 times on the lighted hours iirc.

Bamboozler said:

They water automatically several times a day, 7 times on the lighted hours iirc.

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As I said been while since I did hydro someone here on site will be able to help defo.

Any ideas?

Bamboozler said:

Any ideas?

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Hi bud found this on hydro pulled it of the net, hope it helps. As I said I think it's a watering issue could be a case of the more they grow the thirstier they get. If still unsure use the search engine on site and type your question on there it will bring up a wealth of info from more experienced growers.
Wilting and drooping leaves on a marijuana plant are usually a result of too much or too little water arriving in the roots. For the plant to continue growing normally, the problem has to be fixed right away, otherwise plant growth can be compromised. To learn how to fix a marijuana plant that has begun wilting or drooping, read this article.
A cannabis plant with wilting or drooping leaves is quite a sad looking one, and it’s important to keep your plants looking happy. A case of wilting cannabis leaves can happen to any grower and there are ways out of the situation if you find yourself in it. These two problems are generally caused by overwatering or underwatering your plant and are easily avoidable if you pay close attention.
So new growers should have no fear. Wilting cannabis leaves are not the end of your marijuana garden, but if you want to ensure a good yield, you should attend to the problem straight away.
The difference between drooping and wilting cannabis leaves
It’s important that you don’t confuse wilting cannabis leaves with drooping leaves, because they have completely opposite causes. Wilting is what has happened to your leaves when they have begun to curl at the tips. The tell tale sign that your leaves are wilting is that they have also started turning yellow on the tips that are curling under. On the other hand, drooping is distinguished by the droopiness of the entire leaf, rather than just the tips. When your plant is drooping, you will not see yellow tips on the leaves. Drooping leaves are also firmer than wilting leaves, which just look tired and lifeless.

Im here to answer my own question. Most likely the culprit was the temperature, which due to recent observations reached a bottom point of 12 degrees celsius at "night". I cranked up the heat to 20 at night and 25 at day, and boy oh boy have the tides turned.