The Grow Awards 2025 🏆

Chat

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

Recommended

Back to Grow Questions

Hilfe.. calmag Mangel?

Cs2810started grow question 4 months ago

Hey grower, kann jemand Helfen? Seit 10 Tagen Blütephase. Neue Triebe werden sehr hell. Eventuell Calmag?

Cs2810

Cs2810

Cs2810

Cs2810

Solved

Leaves. Color - Yellow

likes

Leromeanswered grow question 4 months ago

Hey, dass die neuen Triebe in der Mitte hell werden ist normal am anfang der Blütephase, einen leichten Magnesiummangel hast du aber auch an den teilweise hellen Stellen zwischen den Blattadern CalMag wäre eine gute Idee wenn du welches hast, Pflanzen in der späten Vegi und frühen Blütephase sind meistens sehr "hungrig" nach calcium und magnesium

likes

Complain

Selected By The Grower

Similar Grow Questions

Solved

smells_like_weed_in_here

Yellowish color on most of the leaves and the condition did not change after watering. I suspect it's nitrogen deficiency or some pH problems. The plant is in pre-flowering, with sex being revealed. Will go into flowering soon. I watered it with 1.5l Any thoughts?

Leaves. Color - Yellow

5 years ago

2

2

Solved

Underthestairsgrowbro

Newer growth is lighter in color and thicker than the other leaves. She was under my humidifier so maybe drinking too much? Dry organic amendments so no additives in water. Several other grows in same feed schedule and no issues

Leaves. Color - Yellow

5 years ago

1

1

Solved

Maybe someone can tell me if I should or can defoliate The BlueDream No 1&2 Cause the leaves cover a lot & each Day the girls grow more & it gets more difficult to LST or bent the leaves somewhere & idk what’s going on with the BlueDream No.3 I did some research & I thought it might be CalMag deficiency so I add 1,5 ml GHE CalMag to 1L water but the problem with the leaves is still there ( see pic BlueDream No.3 ) I’ll be thankful for any advice & help !!

Leaves. Color - Yellow

5 years ago

2

1

Solved

Cookie_thefarmer

Noticing my very bottom leaves are turning yellow. Should I be concerned with this? Any idea of the cause? I haven’t used any nutrients yet.

Leaves. Color - Yellow

5 years ago

10

8

Solved

Hi everyone, This is my first grow. So, do i miss something important here? i do not use any method at all.. she is growing how she wants.. the only thing bad i can notice is the yellow leaves (older leaves) any advice are welcome. i use a mix of BIO-bloom and TOPMAX atm

Leaves. Color - Yellow

5 years ago

1

1

Solved

Over the last week, I have noticed quite a lot of yellowing of leaves, along with them drying out and getting brittle. Now that I am checking the PH of the nutrients, and adjusting to 6.0, I have no idea what's going on. Any insight as to what the issue may be, is appreciated.

Leaves. Color - Yellow

5 years ago

3

2

Solved

Can someone help me diagnose why my girl has yellow spots on older leafs and new ones coming in yellow? She is getting fox farms nutrients and watered but I think I may have caused lockout??

Leaves. Color - Yellow

5 years ago

1

Solved

trailerparksupervise

Is it normal for new growth 10 days into flowering to be lightening in colour? I am new and noticing that it is fairly lighter than previous veg growth before as my nutrient needs and feed has changed. Just want to be safe! Thx 😄

Leaves. Color - Yellow

5 years ago

2

2

Solved

I don't have a PH meter, just some test strips. Can anyone recommend an inexpensive meter I can get in the UK? There's a bit of yellowing on some leaves (see my diary entry on week 8) Buds seem to be developing a bit slow Should I switch from 24 hr to 20/4 or 18/6 ?

Buds. Not fattening

Leaves. Color - Yellow

5 years ago

2

3

Solved

Ok.i have my largest plant with yellowish leaves this week. Next week I will remove grow lights before photos. Help with yellowing leaves. I am running a good mixture soil, with manure as a grow. Should I addgrow?

Leaves. Color - Yellow

5 years ago

4

4

Solved

VagabondGrowHound

So, my other plants have surpassed this OG, unfortunately, a week younger, too. I took pictures of the PH test Do you think that was the problem? (I personal so I don't water for the first 3 weeks, lol, otherwise the above happens.)

Leaves. Color - Yellow

5 years ago

1

3

Solved

Hello guys! Overall the plant looks light green/yellowish and pretty small, with short internodes and bottom leaves with burnt and curled up tips. I give water every 3/4 days and commonly suggested fertilzers quantities. How can I let her recover and get bigger? Thanks :)

Leaves. Tips - Burnt

Leaves. Color - Yellow

Plant. Spaces between nodes

5 years ago

3

2

Solved

N or Mag deficiency or other? Leaf tips browning, curling up. Pics added to my diary week 10 Day 1 week 11, start week 5 flower Soil Roots Organics 707; amended perlite, worm casings, silica Temp 64 - 81 RH 40 - 35 Water PH 6.5 Nutrients - Superthrive, Budswel, Biocanna Flores

Leaves. Color - Yellow

5 years ago

15

7

Solved

I have a deficiency. Can you please check out my pics and give your advice? I thinks its a Magnesium deficiency, am I correct? Increase CalMag? Flush with extra water? Any tips would be helpful.

Leaves. Veins - yellow between

Leaves. Color - Yellow

5 years ago

4

3

Solved

Brown spots and yellowing pictured above. My best guess is a Cal/Mag deficiency. Was feeding Botanicare Cal-Mag Plus at 1 ml/l up until ~2 weeks ago (friend has been watering while I was out of town). Before I feed her, any advice on what the problem is and how to correct it?

Leaves. Color - Yellow

Leaves. Color - Dark-brown

5 years ago

2

Solved

what are those spots on the leaves, they appeared last week. I try to rinse the root with 2 L of pH 6.7 of water without nutrients, but it seems to continue

Leaves. Color - Yellow

Leaves. Color - Dark-brown

5 years ago

2

1

Solved

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

Leaves. Color - Yellow

6 years ago

8

5

Solved

Plant is 4 weeks old and starts showing yellow leaves in the under areas. No extra nutrients added because I use plagron royal mix soil wich has al the NKP for 6 weeks they say. Little bit of Root power and only water was given.

Leaves. Color - Yellow

6 years ago

5

4

Solved

Just looking for some input on how you think the grow is going so far or any advice towards growing LSD25 and Mexican Airlines. I’ve noticed some of the lower fan leaves yellowing and drying up, I read that is normal going into flowering just hope it doesn’t spread up the plant

Leaves. Color - Yellow

6 years ago

1

1

Solved

What's up with the yellowing leaves? They seem to yellow from the outside inwards and the tips also seem burnt too. Is it nutrient burn? Excess or Deficiency? It's mostly on the bottom but its affecting some of the bigger leaves in the middle too, Watch the video for an overview!

Leaves. Color - Yellow

6 years ago

1

1