By continuing to use the website or clicking Accept you consent to our cookies and personal data policy and confirm that you are at least 18 year old. For details please see Privacy Policy and Terms
Accept
Cant find out what the trouble is.
I_roll_my_own_420started grow question 5y ago
Cant find what is wrong. Leaves are yellowing and I cant find out why. Still about 4 weeks of flower to go.
Open
Leaves. Color - Yellow
likes
Answer
NONSENSEanswered grow question 5y ago
Hi there,
A cannabis phosphorus deficiency generally appears on leaves from the lower/older parts of the plant. The lower leaves may turn dark green or yellow, and start getting spots or big splotches that look brown.
Sometimes accompanied by a Calcium deficiency, as Phosphorus and Calcium interact with each other in the plant.
likes
Complain
Similar Grow Questions
Solved
KnightRider
Yellowing leavesHi Growmies, im in week 7 of my flowering cycle, my leaves have started yellowing between the veins before turning brown and dying from the tip inwards. Is this a calcium deficiency? Or is it natural dying from the end of flowering cycle or something else? Please advise thanks ✌️
Week 16
Leaves. Color - Yellow
5y ago
3
4
Solved
Rollex420
Deficiency or light stress?I start by saying that the light was not close enough to cause stress imo.. was about (30cm) of distance from this plant. it seems that it is more a deficiency in my opinion but I don't know exactly which one.. What do you think about that?
Leaves. Color - Yellow
Leaves. Color - Pale
Feeding. Deficiences
5y ago
2
2
Solved
GooeyGuy
Bright Green new growth? Is Co2 to blame?New growth is very bright green. Just introduced an in-line UV filter to help combat and bacteria in system. Also just turned on the Co2 system and got it up to 850ppm. Why is new growth so bright green? Could Co2 do this?Week 5
Leaves. Color - Yellow
3y ago
1
4
Solved
PoleKat
One leaf yellow spotsHi guys, just came across this leaf today one of the lowest ones on one of my plants. None of the other plants seem to be affect nor any of the other leaves on this plan. Can’t seem to find it on list of deficiencies as it presents different. Any thoughts? Thanks guys!
Week 7
Leaves. Color - Yellow
5y ago
4
Solved
Chr0nus
FeedingHow often am I meant to feed and water my plants. I do water my plants every 3 days and after every three feeds I flush. Concerned as all the bottom leaves in my grow are turning yellow but the tops are okay. I do give them Calmag so I’m not sure what the issue is here.
Leaves. Color - Yellow
2y ago
5
3
Solved
stupid
Potassium and Calcium deficiency?Both plants are autos on day 49 after sprouting.
Plants didn't get any fertilizer during veg. I noticed deficiencies about 2 weeks ago, and added BioBizz Bio-Bloom, Top-Max and CalMag to next waterings.
Planning to alternate water and feeding for the rest of the grow.
any advice
Leaves. Tips - Burnt
Leaves. Color - Yellow
Setup. Strain - Autoflowering
1y ago
2
3
Solved
Shemmie
lower leaves yellowing in 3 days?Over the past 3 days my 2nd plant lower leaves started to yellow. Both are fed the same amount and the same rates. I noticed the one that is yellowing the leaves are upwards and that is a good sign, but the lower leaves are yellowing too fast. I am unsure what could cause this.
Week 2
Leaves. Color - Yellow
9mo ago
2
6
Solved
Jaykut22
I have no idea what is going on. Everything is within spec. Ph, temp, humid, lux was 50k now adjusted to 25k.Droopy and yellowing leaves. Plant is not underwatered. Starting with a mag deficiency and she bounced back early. Started lst and 2 days later she started dropping and yellowing more. Everything is in check from ph, temp, humidity. I just dosed with more cal mag.
Leaves. Color - Yellow
3y ago
1
2
Solved
Cannabis_Ninja
Weak yellowing leavesNot every single time but quite often my plants are turning yellow in the middle of flowering. It starts from bottom and follows to top. I can basically “take off” leaves off stem and the upper ones getting dry and brittle. I’m also quite sure the ph level is correct. Any guess?
3y ago
1
1
Solved
soulsofarmony
Deficiences or overfeedingIn the last 3 days two of my plant seem to have some problems. First the oldest leaf turno Yellow and the become burnt. I Always check the ph solution and i Always feed them in this 2 weeks so i thought that maybe i overfeed them. I post the pics in the appropriate section.HELPLS
4y ago
5
4
Solved
KISSGrowing
Lower leaves too pale or yellowing?I am noticing the lower leaves of my Royal Critical Automatic to be much more pale green than the top of the plant.
Is this a nutrient/light/watering/lst stress problem if at all?
First Grow. Started balcony, moved to tent D23.
SF-1000 light, 100% at ~ 55cm from canopy.
1y ago
2
2
Solved
Terp1
Halb gelb, halb grünMeine Pflanze zeigt aktuell leichten Kalium Mangel. Aber irgendwie nur auf eine Hälfte der Pflanze. Die andere Hälfte sieht gut gefüttert aus. Kann mir das jemand erklären? Also warum betrifft der Mangel nicht die komplette Pflanze?
Leaves. Color - Yellow
Feeding. Deficiences
3y ago
1
3
Solved
Autogrowing
Do these look healthy? Thoughts? I'm new to hydro/growingI have autos growing in a dwc system being fed half the regular amount of hydroguard, calmag, and grow/bloom. 1 plant is a week younger. The dark green plant looks like its leaves are clawing and has big brown spots on the leaves. The other has some brown dots and little yellow.
Leaves. Curl down
Leaves. Color - Yellow
Leaves. Color - Dark-brown
4y ago
3
