# Need help, leaves turning yellow with brown spots **URL:** \ **Category:** Flowering\ **Created:** [July 20, 2022, 2:28am UTC](https://ilgmforum.com/t/need-help-leaves-turning-yellow-with-brown-spots/90469 "2022-07-20T02:28:25Z")\ **Posts on this page:** 19\ **Page:** 1
**Author:** ![Bruno\_Capone](https://avatars.discourse-cdn.com/v4/letter/b/35a633/32.png) [@Bruno\_Capone](https://ilgmforum.com/u/Bruno_Capone)\ **Post date:** [July 20, 2022, 2:28am UTC](https://ilgmforum.com/t/need-help-leaves-turning-yellow-with-brown-spots/90469/1 "2022-07-20T02:28:26Z")
Hey folks that’s my first grow and I am at week 5, feeding my both plants the same way but for some reason one of my plant leaves turning yellow and the other look great , I made research and I think that I have calcium and magnesium problem, so I order Cal-Mag and will possibly feed the plant this Friday with it but I want your opinion as well. I start feeding my plants at week 4 with fox farm, I test my soil and it’s in 6.5 Ph range but the nitrogen was very low so I gave the plant extra grow big and i add 2 tsp. Epsom salt to give more magnesium ![image](https://global.discourse-cdn.com/growingmarijuana/original/4X/5/8/0/580f933a2388e7124b6e97744292d42806339b39.jpeg) ![image](https://global.discourse-cdn.com/growingmarijuana/original/4X/6/9/1/691d314c907f913033dd55c5ebed6b7a85295076.jpeg) ![image](https://global.discourse-cdn.com/growingmarijuana/original/4X/3/c/c/3cc1f4d49151db09e70015c88964a64d85617b8b.jpeg) ---
**Author:** ![Caligurl](https://sea2.discourse-cdn.com/growingmarijuana/user_avatar/ilgmforum.com/caligurl/32/597950_2.png) [@Caligurl](https://ilgmforum.com/u/Caligurl)\ **Post date:** [July 20, 2022, 2:34am UTC](https://ilgmforum.com/t/need-help-leaves-turning-yellow-with-brown-spots/90469/2 "2022-07-20T02:34:58Z")
I always say to check the ph of the soil by doing a soil slurry test before you chase deficiencies… it does look like Cal/Mag but check ph first ---
**Author:** ![Caligurl](https://sea2.discourse-cdn.com/growingmarijuana/user_avatar/ilgmforum.com/caligurl/32/597950_2.png) [@Caligurl](https://ilgmforum.com/u/Caligurl)\ **Post date:** [July 20, 2022, 2:35am UTC](https://ilgmforum.com/t/need-help-leaves-turning-yellow-with-brown-spots/90469/3 "2022-07-20T02:35:33Z")
And welcome to the community!! ---
**Author:** ![Bruno\_Capone](https://avatars.discourse-cdn.com/v4/letter/b/35a633/32.png) [@Bruno\_Capone](https://ilgmforum.com/u/Bruno_Capone)\ **Post date:** [July 20, 2022, 2:36am UTC](https://ilgmforum.com/t/need-help-leaves-turning-yellow-with-brown-spots/90469/4 "2022-07-20T02:36:11Z")
Thank you , I checked the ph it’s in 6.5 range , I checked the nitrogen and it was very low ---
**Author:** ![Caligurl](https://sea2.discourse-cdn.com/growingmarijuana/user_avatar/ilgmforum.com/caligurl/32/597950_2.png) [@Caligurl](https://ilgmforum.com/u/Caligurl)\ **Post date:** [July 20, 2022, 2:40am UTC](https://ilgmforum.com/t/need-help-leaves-turning-yellow-with-brown-spots/90469/5 "2022-07-20T02:40:06Z")
Nitrogen deficiency will start at the bottom and work it’s way up. You checked the soil ph and not runoff? ---
**Author:** ![Bruno\_Capone](https://avatars.discourse-cdn.com/v4/letter/b/35a633/32.png) [@Bruno\_Capone](https://ilgmforum.com/u/Bruno_Capone)\ **Post date:** [July 20, 2022, 2:43am UTC](https://ilgmforum.com/t/need-help-leaves-turning-yellow-with-brown-spots/90469/6 "2022-07-20T02:43:48Z")
Not very sure what runoff is but I guess is related with ppm, I don’t have unfortunately ppm meter , I just order ph meter, still learning while I am growing, I know as a first grow i can’t expect much but hopefully i will learn ---
**Author:** ![Bruno\_Capone](https://avatars.discourse-cdn.com/v4/letter/b/35a633/32.png) [@Bruno\_Capone](https://ilgmforum.com/u/Bruno_Capone)\ **Post date:** [July 20, 2022, 2:44am UTC](https://ilgmforum.com/t/need-help-leaves-turning-yellow-with-brown-spots/90469/7 "2022-07-20T02:44:51Z")
Do you think i should just feed it Friday with cal-mag or I need to do ppm test before that? ---
**Author:** ![HeyJB](https://sea2.discourse-cdn.com/growingmarijuana/user_avatar/ilgmforum.com/heyjb/32/772068_2.png) [@HeyJB](https://ilgmforum.com/u/HeyJB)\ **Post date:** [July 20, 2022, 3:02am UTC](https://ilgmforum.com/t/need-help-leaves-turning-yellow-with-brown-spots/90469/8 "2022-07-20T03:02:00Z")
What’s your watering schedule? Leaves look like it might be over watered. Be sure to let it dry out most the way before you rewater. You’ll need to get a ppm meter so you can tell how much nutes your plant is eating and how much you need to feed. This will change throughout the grow. You’re doing great with the p.h. Keep that up. Adding some calmag might help, but won’t hurt, so go for it. ---
**Author:** ![Bruno\_Capone](https://avatars.discourse-cdn.com/v4/letter/b/35a633/32.png) [@Bruno\_Capone](https://ilgmforum.com/u/Bruno_Capone)\ **Post date:** [July 20, 2022, 3:07am UTC](https://ilgmforum.com/t/need-help-leaves-turning-yellow-with-brown-spots/90469/9 "2022-07-20T03:07:36Z")
It’s a 5 gallon pot i water 1.2 gallon water per watering and usually rewater in the next 3,4 days or when I touch the top of the soil and feel it completely dry. Good Idea about the ppm I will go ahead and get it. Thanks for the tip hopefully my baby will make it , don’t want it to die for sure. ---
**Author:** ![HeyJB](https://sea2.discourse-cdn.com/growingmarijuana/user_avatar/ilgmforum.com/heyjb/32/772068_2.png) [@HeyJB](https://ilgmforum.com/u/HeyJB)\ **Post date:** [July 20, 2022, 3:17am UTC](https://ilgmforum.com/t/need-help-leaves-turning-yellow-with-brown-spots/90469/10 "2022-07-20T03:17:33Z")
There’s some very good topics on this forum about ppm and feeding. You would be wise to read a few of them. Also you’ll make some mistakes and you’ll learn. Post some pics and updates when you get them. ---
**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:** [July 20, 2022, 1:12pm UTC](https://ilgmforum.com/t/need-help-leaves-turning-yellow-with-brown-spots/90469/11 "2022-07-20T13:12:43Z")
> [@Bruno\_Capone](#): > > nitrogen and it was very low 👆 how did you check this seperate from the other nutrients? 🤟 ---
**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:** [July 20, 2022, 1:13pm UTC](https://ilgmforum.com/t/need-help-leaves-turning-yellow-with-brown-spots/90469/12 "2022-07-20T13:13:49Z")
I’m a numbers guy and always go to my run PH and PPMs. @Caligurl stated this and chasing deficiencies 🤟 ---
**Author:** ![Caligurl](https://sea2.discourse-cdn.com/growingmarijuana/user_avatar/ilgmforum.com/caligurl/32/597950_2.png) [@Caligurl](https://ilgmforum.com/u/Caligurl)\ **Post date:** [July 20, 2022, 2:37pm UTC](https://ilgmforum.com/t/need-help-leaves-turning-yellow-with-brown-spots/90469/13 "2022-07-20T14:37:24Z")
It wouldn’t hurt to give cal/mag… I always add a tiny amount of Epsom salts to help as well. It would be really hard to overdo cal/mag. I use General Organics… I think it have molasses in it… at least it smells like it does. ---
**Author:** ![Caligurl](https://sea2.discourse-cdn.com/growingmarijuana/user_avatar/ilgmforum.com/caligurl/32/597950_2.png) [@Caligurl](https://ilgmforum.com/u/Caligurl)\ **Post date:** [July 20, 2022, 2:41pm UTC](https://ilgmforum.com/t/need-help-leaves-turning-yellow-with-brown-spots/90469/14 "2022-07-20T14:41:50Z")
I stick my finger in the soil down to my second knuckle and when it feels dry that far down, it’s time to water. Also runoff… I water until it runs out the bottom but I keep containers under them. You take the water that overflowed into the container and measure ph and ppm. It’s important to water until runoff if you are using nutrients like Fox Farms and others because you will have a much higher chance of salt buildup and then you need to flush a few times. If you water until 15-20% runoff, you reduce the need for flushing. ---
**Author:** ![Bruno\_Capone](https://avatars.discourse-cdn.com/v4/letter/b/35a633/32.png) [@Bruno\_Capone](https://ilgmforum.com/u/Bruno_Capone)\ **Post date:** [July 20, 2022, 3:16pm UTC](https://ilgmforum.com/t/need-help-leaves-turning-yellow-with-brown-spots/90469/15 "2022-07-20T15:16:52Z")
, I got one of those soil testing kits from lows but I will definitely need ppm meter, it’s just shocked me that both plants are the same strain and I fed them and water them the same way and one plant doing great and the other have some issues. Thank you so much for your help ---
**Author:** ![Caligurl](https://sea2.discourse-cdn.com/growingmarijuana/user_avatar/ilgmforum.com/caligurl/32/597950_2.png) [@Caligurl](https://ilgmforum.com/u/Caligurl)\ **Post date:** [July 20, 2022, 11:00pm UTC](https://ilgmforum.com/t/need-help-leaves-turning-yellow-with-brown-spots/90469/16 "2022-07-20T23:00:24Z")
Coolio. Yeah, same strains can act totally different… like my sister and I LOL. Feel,free to tag me any time ---
**Author:** ![Bruno\_Capone](https://avatars.discourse-cdn.com/v4/letter/b/35a633/32.png) [@Bruno\_Capone](https://ilgmforum.com/u/Bruno_Capone)\ **Post date:** [July 22, 2022, 12:08am UTC](https://ilgmforum.com/t/need-help-leaves-turning-yellow-with-brown-spots/90469/18 "2022-07-22T00:08:59Z")
Update: I ran ph runoff test and the plant was with ph 4.0 , I immediately flush it and bring the ph to 5.9, feed it with grow big and cal-mag hopefully that will take care of the issue. Seems like the lowes soil testing kit is a garbage, I did the ph test with a pen and it was way off ---
**Author:** ![HeyJB](https://sea2.discourse-cdn.com/growingmarijuana/user_avatar/ilgmforum.com/heyjb/32/772068_2.png) [@HeyJB](https://ilgmforum.com/u/HeyJB)\ **Post date:** [August 5, 2022, 2:33pm UTC](https://ilgmforum.com/t/need-help-leaves-turning-yellow-with-brown-spots/90469/19 "2022-08-05T14:33:50Z")
How are they looking now? Any better? ---
**Author:** ![Bruno\_Capone](https://avatars.discourse-cdn.com/v4/letter/b/35a633/32.png) [@Bruno\_Capone](https://ilgmforum.com/u/Bruno_Capone)\ **Post date:** [August 5, 2022, 3:41pm UTC](https://ilgmforum.com/t/need-help-leaves-turning-yellow-with-brown-spots/90469/20 "2022-08-05T15:41:08Z")
I switched the light and it start flowering, I thought it was auto, because I bought auto but it turns that it’s feminized I think. I worry that the flower don’t have any pruning done and look like monster, for now it’s ok and hope it won’t overgrow the space. Thanks for asking ![image](https://global.discourse-cdn.com/growingmarijuana/original/4X/6/1/e/61e7988e03b01a153c000ab61cf15bce579ad4c2.jpeg)