# Deficiency ? Yellow leaves, edges Curling up **URL:** \ **Category:** Troubleshooting\ **Tags:** nutes, indoor-grow\ **Created:** [October 7, 2021, 11:04am UTC](https://ilgmforum.com/t/deficiency-yellow-leaves-edges-curling-up/76470 "2021-10-07T11:04:37Z")\ **Posts on this page:** 20\ **Page:** 1
**Author:** ![NND](https://avatars.discourse-cdn.com/v4/letter/n/b2d939/32.png) [@NND](https://ilgmforum.com/u/NND)\ **Post date:** [October 7, 2021, 11:04am UTC](https://ilgmforum.com/t/deficiency-yellow-leaves-edges-curling-up/76470/1 "2021-10-07T11:04:37Z")
Hello im having trouble in my veg tent i noticed some N and Mg deficiencys in early veg, i then stardet to feed ad a higher ppm and most seemed like they were getting better but there is one that really stands out ( not in a good way ). I could really use some help. Thanks a lot Some information on the grow : Veg week 4 75% coco coir 25% perlite Remo nutrients: grow, micro, magnifical, velokelp Feeding water : ± 900 ppm 6.3 ph Day temp : 23-25 C Night temp : 19-20 C R.H : 70-80% ( just added a dehu today, still waiting on that result ) Plants topped once at 4/5 node Pictures: ![image](https://global.discourse-cdn.com/growingmarijuana/original/4X/2/a/6/2a62d2632c8d6d7140e6aa2963f437552850fed2.jpeg) ![image](https://global.discourse-cdn.com/growingmarijuana/original/4X/8/3/f/83f73729862508a3ef68e15f0392ac2d94851d6d.jpeg) ![image](https://global.discourse-cdn.com/growingmarijuana/original/4X/3/1/5/315760ed670cd6bdeb2e771fa4da506180398be2.jpeg) ![image](https://global.discourse-cdn.com/growingmarijuana/original/4X/f/0/3/f03bd716f67ba9b33a0d3ddfde57adef6890f98f.jpeg) ---
**Author:** ![MidwestGuy](https://sea2.discourse-cdn.com/growingmarijuana/user_avatar/ilgmforum.com/midwestguy/32/914277_2.png) [@MidwestGuy](https://ilgmforum.com/u/MidwestGuy)\ **Post date:** [October 7, 2021, 11:30am UTC](https://ilgmforum.com/t/deficiency-yellow-leaves-edges-curling-up/76470/2 "2021-10-07T11:30:28Z")
> [@NND](#): > > Feeding water : ± 900 ppm 6.3 ph Do you know your runoff pH? Curled leaves can be caused by improper pH. ---
**Author:** ![HappyHydroGrower](https://sea2.discourse-cdn.com/growingmarijuana/user_avatar/ilgmforum.com/happyhydrogrower/32/687342_2.png) [@HappyHydroGrower](https://ilgmforum.com/u/HappyHydroGrower)\ **Post date:** [October 7, 2021, 11:34am UTC](https://ilgmforum.com/t/deficiency-yellow-leaves-edges-curling-up/76470/3 "2021-10-07T11:34:27Z")
Have you checked for bugs? You will need to check the under side of the leaves with a scope. Although, it seems like if one plant had it, others would be displaying the same symptoms. Another thing to check is make sure no fans are blowing directly on them. Make sure your PH is in check. Good luck! 👍🏻✌🕶 ---
**Author:** ![NND](https://avatars.discourse-cdn.com/v4/letter/n/b2d939/32.png) [@NND](https://ilgmforum.com/u/NND)\ **Post date:** [October 7, 2021, 11:34am UTC](https://ilgmforum.com/t/deficiency-yellow-leaves-edges-curling-up/76470/4 "2021-10-07T11:34:47Z")
No i dont. They dont drink too much because of the high humidity i think so i dont want to overwater them. Thats why i was not able to test any runoff… Im also worried that the ph might be an issue. I used dry coco bricks so idk if they are really that good. Thanks ---
**Author:** ![OGIncognito](https://sea2.discourse-cdn.com/growingmarijuana/user_avatar/ilgmforum.com/ogincognito/32/475294_2.png) [@OGIncognito](https://ilgmforum.com/u/OGIncognito)\ **Post date:** [October 7, 2021, 11:38am UTC](https://ilgmforum.com/t/deficiency-yellow-leaves-edges-curling-up/76470/5 "2021-10-07T11:38:41Z")
Everything looks to be within range except the RH is high. I’m leaning towards a PH issue or excessive mineral build up in the root zone…related back to PH. You should be watering to run off to help prevent that build up if that’s the issue 🤟 ---
**Author:** ![NND](https://avatars.discourse-cdn.com/v4/letter/n/b2d939/32.png) [@NND](https://ilgmforum.com/u/NND)\ **Post date:** [October 7, 2021, 11:39am UTC](https://ilgmforum.com/t/deficiency-yellow-leaves-edges-curling-up/76470/6 "2021-10-07T11:39:33Z")
Yes i checked every plant and couldnt find anything, i had a few small flies on my yellow sticker but none on the plants. I have a small clip vent about 40 cm above de canopy do you think that is too close ? Thanks a lot 🙂 ---
**Author:** ![NND](https://avatars.discourse-cdn.com/v4/letter/n/b2d939/32.png) [@NND](https://ilgmforum.com/u/NND)\ **Post date:** [October 7, 2021, 11:48am UTC](https://ilgmforum.com/t/deficiency-yellow-leaves-edges-curling-up/76470/7 "2021-10-07T11:48:46Z")
Thank you, yes the RH really sucks i am only able water every 3-4 days an still without runoff, i dont want to risk root rot so i wait till i got the environment under control i guess. Are there any soil ph pens out there that are not either 200€ or complete garbage ? Thanks 🙂 ---
**Author:** ![HappyHydroGrower](https://sea2.discourse-cdn.com/growingmarijuana/user_avatar/ilgmforum.com/happyhydrogrower/32/687342_2.png) [@HappyHydroGrower](https://ilgmforum.com/u/HappyHydroGrower)\ **Post date:** [October 7, 2021, 12:04pm UTC](https://ilgmforum.com/t/deficiency-yellow-leaves-edges-curling-up/76470/8 "2021-10-07T12:04:10Z")
> [@NND](#): > > Are there any soil ph pens out there I would look into an Apera PH 20 pen. They are reliable and affordable. Your fans are probably not the problem. if you’re sure you don’t have bugs, I would lean towards a ph problem like mentioned above. Keep us posted. 👍🏻✌🕶 ---
**Author:** ![OGIncognito](https://sea2.discourse-cdn.com/growingmarijuana/user_avatar/ilgmforum.com/ogincognito/32/475294_2.png) [@OGIncognito](https://ilgmforum.com/u/OGIncognito)\ **Post date:** [October 7, 2021, 12:15pm UTC](https://ilgmforum.com/t/deficiency-yellow-leaves-edges-curling-up/76470/9 "2021-10-07T12:15:19Z")
As @HappyHydroGrower mentioned, Apera makes the best PH pen in my opinion and not expensive. My TDS pen is a Blue Lab and recommend that as well. ---
**Author:** ![OGIncognito](https://sea2.discourse-cdn.com/growingmarijuana/user_avatar/ilgmforum.com/ogincognito/32/475294_2.png) [@OGIncognito](https://ilgmforum.com/u/OGIncognito)\ **Post date:** [October 7, 2021, 12:18pm UTC](https://ilgmforum.com/t/deficiency-yellow-leaves-edges-curling-up/76470/10 "2021-10-07T12:18:41Z")
You won’t risk root rot with scheduled watering/feeding at the right intervals. The high RH will lead to bud rot. I have 2 mini (16”) oscillating tower fans that blow under and through my canopies to help with high RH and air circulation 🤟 ---
**Author:** ![Nicky](https://sea2.discourse-cdn.com/growingmarijuana/user_avatar/ilgmforum.com/nicky/32/397422_2.png) [@Nicky](https://ilgmforum.com/u/Nicky)\ **Post date:** [October 7, 2021, 1:57pm UTC](https://ilgmforum.com/t/deficiency-yellow-leaves-edges-curling-up/76470/11 "2021-10-07T13:57:06Z")
Flush them, pour water until. The ppm of the water coming out is like 300-400 ppm Then feed them fully right after. Your getting taco leaf. Raise your temp to 27c will help balance humidity (a heater on a temp controller works for me) ---
**Author:** ![StonedCold13](https://sea2.discourse-cdn.com/growingmarijuana/user_avatar/ilgmforum.com/stonedcold13/32/1094279_2.png) [@StonedCold13](https://ilgmforum.com/u/StonedCold13)\ **Post date:** [October 7, 2021, 1:59pm UTC](https://ilgmforum.com/t/deficiency-yellow-leaves-edges-curling-up/76470/12 "2021-10-07T13:59:34Z")
Inkbird? ---
**Author:** ![Nicky](https://sea2.discourse-cdn.com/growingmarijuana/user_avatar/ilgmforum.com/nicky/32/397422_2.png) [@Nicky](https://ilgmforum.com/u/Nicky)\ **Post date:** [October 7, 2021, 2:01pm UTC](https://ilgmforum.com/t/deficiency-yellow-leaves-edges-curling-up/76470/13 "2021-10-07T14:01:09Z")
Always, who else? ---
**Author:** ![Nicky](https://sea2.discourse-cdn.com/growingmarijuana/user_avatar/ilgmforum.com/nicky/32/397422_2.png) [@Nicky](https://ilgmforum.com/u/Nicky)\ **Post date:** [October 7, 2021, 2:02pm UTC](https://ilgmforum.com/t/deficiency-yellow-leaves-edges-curling-up/76470/14 "2021-10-07T14:02:06Z")
[https://www.amazon.com/Inkbird-Thermostat-Temperature-Controller-50-108°F/dp/B01M6WMUYI/ref=mp\_s\_a\_1\_6?dchild=1&keywords=Inkbird+plug&qid=1633615295&sr=8-6](https://www.amazon.com/Inkbird-Thermostat-Temperature-Controller-50-108%C2%B0F/dp/B01M6WMUYI/ref=mp_s_a_1_6?tag=ilovegrowingm-20) ---
**Author:** ![StonedCold13](https://sea2.discourse-cdn.com/growingmarijuana/user_avatar/ilgmforum.com/stonedcold13/32/1094279_2.png) [@StonedCold13](https://ilgmforum.com/u/StonedCold13)\ **Post date:** [October 7, 2021, 2:02pm UTC](https://ilgmforum.com/t/deficiency-yellow-leaves-edges-curling-up/76470/15 "2021-10-07T14:02:12Z")
Right on👍 I’m just starting to do my research on them. ---
**Author:** ![StonedCold13](https://sea2.discourse-cdn.com/growingmarijuana/user_avatar/ilgmforum.com/stonedcold13/32/1094279_2.png) [@StonedCold13](https://ilgmforum.com/u/StonedCold13)\ **Post date:** [October 7, 2021, 2:03pm UTC](https://ilgmforum.com/t/deficiency-yellow-leaves-edges-curling-up/76470/16 "2021-10-07T14:03:13Z")
Thanks, as always 🤘 ---
**Author:** ![Aussie\_autos](https://sea2.discourse-cdn.com/growingmarijuana/user_avatar/ilgmforum.com/aussie_autos/32/612108_2.png) [@Aussie\_autos](https://ilgmforum.com/u/Aussie_autos)\ **Post date:** [October 7, 2021, 2:24pm UTC](https://ilgmforum.com/t/deficiency-yellow-leaves-edges-curling-up/76470/17 "2021-10-07T14:24:42Z")
Also curling leaves like that can also be due to much heat in ur tent and the leaves are trying to protect them selfs by showing the underside of the leaf ---
**Author:** ![Dankloud](https://sea2.discourse-cdn.com/growingmarijuana/user_avatar/ilgmforum.com/dankloud/32/678344_2.png) [@Dankloud](https://ilgmforum.com/u/Dankloud)\ **Post date:** [October 7, 2021, 2:56pm UTC](https://ilgmforum.com/t/deficiency-yellow-leaves-edges-curling-up/76470/18 "2021-10-07T14:56:30Z")
Thanks for this, bro. Bought a humidifier 2 months ago, bought an interval timer (ex: 15 sec on, 30 sec off) and was using that to try and keep humidity at a reasonable level… Had no idea something like an automated controller existed. Buying their humidity controller soon. ---
**Author:** ![Nicky](https://sea2.discourse-cdn.com/growingmarijuana/user_avatar/ilgmforum.com/nicky/32/397422_2.png) [@Nicky](https://ilgmforum.com/u/Nicky)\ **Post date:** [October 7, 2021, 3:40pm UTC](https://ilgmforum.com/t/deficiency-yellow-leaves-edges-curling-up/76470/19 "2021-10-07T15:40:19Z")
Your welcome humidty and temp controllers are the way to go. ---
**Author:** ![Covertgrower](https://sea2.discourse-cdn.com/growingmarijuana/user_avatar/ilgmforum.com/covertgrower/32/423081_2.png) [@Covertgrower](https://ilgmforum.com/u/Covertgrower)\ **Post date:** [October 7, 2021, 3:45pm UTC](https://ilgmforum.com/t/deficiency-yellow-leaves-edges-curling-up/76470/20 "2021-10-07T15:45:08Z")
Did you recently increase the amount of light all at once? If so, I would dim the fixture a little, and increase over time. Sudden increase in lighting intensity can cause the leaves to curl too. Magnesium is still needed as others have suggested. [Next page](https://ilgmforum.com/t/deficiency-yellow-leaves-edges-curling-up/76470.md?page=2)