The Grow Awards 2026 π 
Yellowing leaves
Bluntblazer66started grow question 5y ago
Yellowing leaves on young plants
Not sure why the plants are yellowing at the bottom
I added some calmag thinking it maybe a nutrient deficiency
likes
Thumbnail83answered grow question 5y ago
Nitrogen starts yellowing at the bottom, if you have abnormal growth or yellowing on new growth it would be calmag.
JoseTodoLocoanswered grow question 5y ago
I can't see it clear on the photo. Make sure the PH pen is calibrated, also take a look at the new growth after you added the Calmag
1 like
Complain
Mr_Cannab1siranswered grow question 5y ago
Most likely nitrogen deficiency. I know nothing about hydro though, feed needs increasing if it's draining the leaves. It's basically eating itself to survive
2 likes
Complain
Similar Grow Questions
Solved
edsmokesalot
Yellow leafs slow growthHi plants are 10 days old in canna coco natural witch I dont think has any nutriants in it the leafs are bright yellow and seem very slow at growing my light is around 40-50cm from the plants I water 1.5liters every 2-3days when top of soil is dry 1st pic mine 2nd ex of colourWeek 1
Leaves. Color - Yellow
6y ago
4
4
Solved
Mike_269
Nitrogen deficiency but why?My Critical Auto is more and more wilting and yellowing. Most likely due to nitrogen deficiency. Some have red tips on . PH of soil was normal, how can I make sure that it's not nutrient lock anyway? Should I flush it nonetheless? Feed it more? More info in my diary.Leaves. Color - Yellow
2y ago
2
2
Solved
Eagers
Nitrogen Deficiency?Think I might have a Nitrogen Deficiency but just wanted to check and confirm with some of you? Leaves are slightly pale and yellow across the plant. I checked runoff Ph last week and it was 6.1 realised it can lockout some calcium so flushed with 6.7. ThanksLeaves. Color - Yellow
6y ago
1
3
Solved
aphexbg
Light green leaves in color and burnt tips. Some leaves have brown spots.Hi guys, can you please help me diagnose the issue. The plants are in BioBizz All-Mix soil. Treated with Bio Grow, Bio Bloom and Top Max from BioBizz. Also BioBizz Cal-Mag in the past week and 1ml of B52 (twice). A week ago I flushed and initially they were looking good.Leaves. Tips - Burnt
Leaves. Curl down
Leaves. Color - Yellow
5y ago
1
3
Solved
Frnikola
What to do? β BF Runtz Auto - Day 42 - RH70, 80F in BioBizz Light SoilOn my last post, I was advised I have N tox, so I watered w/o BioGrow, just BioBloom and it's gotten much worse. The runoff EC was 1.5 (watered with 0.8, runoff pH was okay), so Iβm guessing it's salt buildup. I plan to flush when this watering dries outβany thoughts?Buds. Not fattening
Leaves. Color - Yellow
Leaves. Color - Black or grey
1y ago
1
Solved
Kenderbetyar
Yellowish leaves/Slow growthThe leaves seem to be a little yellowish,any ideas what could it be? Also,I have noticed that a lot of growers are in the flowering stage ,maybe it's just my impatience but I think they are growing a little slower than normal,perhaps that's because the room temp?5y ago
2
1
Solved
Smokeybbq88
Diagnosis.Can someone diagnose this problem for me please. I'm putting it down to nute burn but would like a second opinion.Leaves. Tips - Burnt
Leaves. Curl up
Leaves. Color - Yellow
5y ago
2
4
Solved
561honda
Is this led light burn ?Ph is on point 6.2 run off is 6.0 no nute burnWeek 10
Leaves. Color - Yellow
4y ago
1
9
Solved
Hermes88
Help me please. Thank you so much.Hi guys I need some help with my little plants, I have three plants one of them it's all right but the other one has this problem, I don't know if the problem is nutritional excess or nutritional deficiency, or maybe the irrigation.Instead for the topleaves look at the last photLeaves. Color - Yellow
Leaves. Color - Dark-brown
3y ago
2
3
Solved
Jarooooon
Yellow-ish leaves and brown spotsI ran into a small problem.
The leaves of my RQS Critical are getting quite yellow and brown spots appear on some of the leaves. PH is kept between 6.1 and 6.5 while growing in organic soil.
I feed according to the BioBizz schedule. Curled leaves have already been fixed.Leaves. Color - Yellow
4y ago
2
3
Solved
2x2growing
Light burn?I am almost positive this is light burn but just want to confirm with you guys. Been experimenting with my light capabilities this grow. Optic 2βs 200 watt at 9 inches from canopy. End of week 7 of flower.
Thank you.
Ps I did burn them with a bit of potassium as well lolWeek 13
Leaves. Color - Yellow
5y ago
2
2
Solved
Biggy2k20
Flushing stage - leaves not yellowingHi guys, la confidential and fat banana here. I've been flushing for just over a week now and have reduced nutes to 500TDS. The leaves aren't yellowing yet though which means the plants still feeding from the soil. I've used 'flawless finish' to help also.Any ideas?Is it an issueLeaves. Color - Yellow
5y ago
2
5
Solved
Goodvibs
Carry on or start againFirst try dwc and has not gone well from the start. Plants whent very yellow way more than they are now., I think they got way to wet. bigger one has roots just showing threw net. Question is should I bin the lot and start again π€·Leaves. Color - Yellow
Roots. Other
5y ago
1
2
Solved
Targona
Yellowed leaves with brown spotsHello, I have a request. My leaves started to turn yellow and brown spots also appear on them. These are Blacberry Gum from Seed Stocker and Deimos from Buddha Seeds. Both plants are 67 days old and are Calmag Atami nutrients and Jungle Indabox set. Thank you very much.Leaves. Color - Yellow
4y ago
1
2