The Grow Awards 2026 🏆
Start My Diary
Start My Diary
Login
Start My Diary
Home
Diaries
Strains
Shorts
Questions
Contests
Growers
Seeds
Breeders
Nutrients
Equipment
Blog
Login
Sign Up
Following
Follow
Brands
&
Growers
to get updates
Back to Grow Questions
Nitrogen toxicity?
Komar85
started grow question 4y ago
Hi fellow growers I don’t know what is going on with my Runtz Ph 6.6 Last feed ( hesi green and blue bootle half dose) + cal mag 2 ml / 5 l
Open
Leaves. Color - Yellow
likes
Answer
Komar85
answered grow question 4y ago
Thanks for advice. I will Check everything at next watering 2-3 days.
likes
Complain
GMSgrows
answered grow question 4y ago
Potassium defficiency. You need to find out if its lockout or just deficient. Check your runoff ec and ph. If your low ec it's a defficiency, if it's high ec lockout. Ph also causes lockout if the parameters aren't correct. Cheers
2 likes
Complain
Similar Grow Questions
Solved
REALEXOTIX
Manganese???
Can someone help me figure out what this is? I’m not for sure what’s going on, I feel like it’s manganese?
Leaves. Color - Yellow
4y ago
2
3
Solved
Hermes88
the plants're killing the lower leaves
They're growing BUT...the plants're killing the lower leaves.I don't understand why,this has been happening since parasites attacked them.Then when the parasites were gone and slowed for a while the leaves were dying.I put neem oil back on it (to prevent pests)and it started gain
Leaves. Color - Yellow
2y ago
6
Solved
CaptainKirk1188
Fixing deficiency/toxicity/overwatering issues
How do I properly identify and remedy these issues with my babies?
Week 12
Leaves. Curl down
Leaves. Color - Yellow
Feeding. Deficiences
3y ago
7
10
Solved
kitchenfarmer
Deficiency & delayed flower
Hi, so the little one from my previous question made it against all odds (the one in the 2nd row left):P Nearly all plants look a bit under the weather & 2 of them (Front left&the one in the back) have not started to flower yet while the others are at it since like a week or 2?
Leaves. Curl down
Leaves. Color - Yellow
1y ago
1
Solved
Everest
yellowed leaves
The leaves started to turn yellow from the inside out. I don't know if it's a disability or an overdose. I'm using Biobizz. Someone solve? Is it in flowering with about 5 weeks to harvest, is it worth stirring or better leaving it like this?
Week 8
Leaves. Color - Yellow
4y ago
2
2
Solved
Farmer99
deficiency
who can tell me what kind of deficiency is it?
Leaves. Color - Yellow
4y ago
4
4
Solved
gornt
Strange yellowing leaf in flowering
What's wrong with my plant? New growth is yellow at the base of the leaves. They've been fed more than usual so cutting back on nutes and I've given them plain water today.
Leaves. Color - Yellow
5y ago
2
2
Solved
uktuk
Leaf tip discoloration - yellow and curling
Leaf tips are showing some discoloring and slight curling upwards. Could this be nutrient burn or like a zinc deficiency? Day 43, last feed was day 29 with gaia green nutrients
Leaves. Color - Yellow
5y ago
2
3
Solved
SilverSlapdick
Leaves drooping and yellowing at beginning of flower
Not sure if it’s due to the fan, light, or under watering? Maybe too many nutrients? Over trained?
Week 5
Leaves. Wilting
Leaves. Color - Yellow
4y ago
9
8
Solved
Duggster
In the past few days im after noticing some discolouration on some of the leaves. They look to be turning a yellowish colour. Is this something I should be concerned about? And if so, what should I do about it?
Week 9
Leaves. Color - Yellow
5y ago
2
2
Solved
Astroboy
What’s this spot
Uhoh is this leaf septoria
Week 2
Leaves. Color - Yellow
5y ago
2
Solved
GracelessGardens
Purple leaves getting worse!?
So I started getting light purple/yellowing last week, after my last grow question, I landed on potassium deficiency. I gave a healthy dose (2 tbsp in a half gallon of spring water) of Fox farms big bloom (0-.05-.07), within the last 48 hrs and the purple looks worse? Any ideas?
Week 7
Leaves. Curl down
Leaves. Color - Yellow
Leaves. Color - Dark-purple
3y ago
1
Solved
KINGT88
Leaves changing colors
Leaves are starting to curl down on one plant. Another plant the leaves are changing colors as shown in the video, what am I doing wrong? First time grower.
Week 4
Leaves. Curl down
Leaves. Color - Yellow
Leaves. Color - Dark-brown
3y ago
1
5
Solved
MoldyCrow
Age or Deficiency
I have noticed one of the girls fan leaves have all started turning yellow and drooping. It looks like they are turning from tip to stem and some of the smaller leaves have also started to turn. Is this due to age or a deficiency of some kind?
Week 7
Leaves. Color - Yellow
Leaves. Color - Red or pink
5y ago
2
4
Solved
Seksix
Hi growmies i would apreciate it ur opinion
Good day guys i have a question about my plants, my question is why my stem turn allmost black but plant doesent show any problem with it , is it genetics or my fault something ? And how they look (ur opinion) i want soon to cut them and to put new ones in bigger pots.
Leaves. Edges burnt
Leaves. Color - Yellow
Leaves. Color - Red or pink
10mo ago
2
3
Solved
Shadowpup369
Leaf spotting
Is this a light burn issue or nutrient deficiency?
Week 4
Leaves. Tips - Burnt
Leaves. Color - Yellow
Leaves. Color - Dark-brown
2y ago
2
2
Solved
psamu
Struggling with deficiencies (nutrient lockout?)
Hello everyone, I need your help. I've been growing 2 Green Gelato Auto from RQS but I've had some deficiencies for a while now. It's my second grow and it's the first time that I adjust the pH. They are in soil and I'm feeding them with Biobizz liquid nutes at a pH between 6-7.
Leaves. Curl up
Leaves. Dropping off
Leaves. Color - Yellow
4y ago
6
7
Solved
HarrysOG
Keep getting yellow leaves in flower. Increased PK and my bloom nutrient. Ph 6.5 when i feed. Soil root zone ph 6.5. Add calmag to my nutrient program say 3 weeks in flower until 2 weeks to harvest which is always very cloudy or milky trichs
Week 8
Leaves. Color - Yellow
6y ago
8
5
Solved
Azielly
Underwatered plant's a first, bottom leaves yellowish and paper feel , do i need to cut them or no
Okay so i think my plant's where underwatered , so now i think it's fine but the bottom leaves turn yellowish and paper feel on both of them ,but the top looks perfect. So here is my question : it's in is 3 week of vegetive , should i cut does leaves or it's to soon. thanks
Week 2
Leaves. Color - Yellow
3y ago
3
3
Solved
known2funk
We've had some really warm weather the past few days. This morning, just before the lights switched off, i saw it was 31.1 degrees C in the grow tent. Are the yellowing leaves a concern? The yellowest leaves are really brittle. I don't believe they're under-waterd.
Week 13
Leaves. Color - Yellow
3y ago
2
2