Vote Now 🏆 for the Grow Awards 2025!
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
Hello growers.. I've a question about the col...
OutForRealanswered grow question 6 years ago
Hello ! Yes you are right, yellowing between veins and purple stems are the main signs of Magnesium def and they can be seen on your plant. Increase your cal mag amount and it will be ok ✌️🏼
Athosanswered grow question 6 years ago
Yes, textbook mg deficiency. You know, once the flowers have formed (3d or 4th week or flower) switch from cal mag to a magnesium / sulfur additive, like epsom salts.
1 like
Complain
CRiSPrGrowanswered grow question 6 years ago
hey @indekast , yeah you absolutely got the start of a magnesium deficiency you can tell from the yellowing in between the veins eventually spreading to the rest of the leaf. you know what to do but : up the cal mag, lower the PH to 5.9, and they will recover in a week or less, hope this helps bro ! 🚀
1 like
Complain
Similar Grow Questions
Solved
WulfBlud
Add CalMag or Manganese? Still slightly discolored and veiny leaves on week 6Calcium or Manganese deficiency? Last week had what I thought was early calcium deficiency. Gave it a dose of CalMag but now not sure if it’s still Calcium or possibly Manganese.
I do mean manganese but I realize it could be a CalMag or Manganese deficiency as well.2 years ago
2
Solved
WulfBlud
Calcium or Manganese deficiency?Calcium or Manganese deficiency? Last week had what I thought was early calcium deficiency. Gave it a dose of CalMag but now not sure if it’s still Calcium or possibly Manganese.Leaves. Veins - stay green
Feeding. Deficiences
2 years ago
2
Solved
kaiabel
Help, they start to taco.I think its to bright and to hot, seeing some taco leaves.
Sanlight on 100% for few days, temps go up to 32C
Next plan is to add BB Grow,Bloom,CalMag,TopMax,BioHeaven,Activera,Algamic no Canna Mono Mag anymore. What do you guys say to feed?
Light back to 80%?
https://growdiariesLeaves. Veins - stay green
Leaves. Color - Pale
Setup. Lighting
2 years ago
1
3
Solved
DeepWaterGrower
White tips on leaves (left one) veins (right one) - POST AGAIN DUE TOO SPAM HEREI already made the question, but there is too spam: https://growdiaries.com/grow-questions/54997-white-tips-on-leaves-and-veins-on-the-other-one
1) white tips on the leaves (the left one)
2) weird veins (right one)
Please look to the diary for the info you need, thanks a lot2 years ago
6
4
Solved
DeepWaterGrower
White tips on leaves and veins on the other oneHi guys, what should I do to fix these problems?
1) I see a lot of white tips on the leaves on the left one.
2) On the other hand the right one leaves show weird veins or am I wrong?
Please take a look to the diary for the info you need, thanks a lot.2 years ago
3
1
Solved
BisEsKlappt420
Does the females look good ? First grow alert.Week 3.
BioBizz all-mix, 3.5gal pots, 450w-led , NL-Auto; Royal Queen seeds.
So far I have only fed them root juice.
I overwatered the seedlings at the time. the all mix is still wet to this day.
three of my plants have a leaf with a light spot.Leaves. Veins - stay green
Leaves. Color - Yellow
2 years ago
1
1
Solved
laberg
Yellow discoloration againI'm annoyed by having to post another question but oh well. Yesterday evening I increased the PAR from 370 to 400 in center. This morning the top fan leaves were pointing straight up and so I raised the lights a little. I later looked and saw discoloration. Light burn?2 years ago
1
2
Solved
RosQuare
Too much light or too little feed?Nutrient deficiency? Or Light burn? PH of solution is 6 and run off is 6.2 so almost the same. The plants in coco look like this, the plants in soil are just a bit lighter in the growing centre. I’ve been giving a 50% feed and I lowered the lights 4in about 12 hours ago.Week 2
Leaves. Veins - stay green
a year ago
5
Solved
pigywigyswag
Pests?Hello everyone, I am not sure if my apple fritter plant is being attacked by pests or if I’m experiencing a nutrient excess or deficiency… I am new to growing and have dried the soil out for the past two days, and applied 1million nematodes into the soil a week ago.Leaves. Veins - stay green
2 years ago
2
Solved
Royalmanola
My plants have dark veins and one of em is crispyHello
One of my plants has started to dry, the leaves are turning a bit crispy while still looking healthy?? and overall I feel like something is wrong because the new leaves of my plants and some not-so
-old ones are really dark at the veins
I’m waiting for my pH monitorLeaves. Dropping off
Leaves. Veins - stay green
3 years ago
1
1
Solved
Dankbudz84
Deficiency canna line in cocoI’m following the canna feeding chart on to 1/4 strength plus 3ml/gallon cal mag, 3 of the juicy fruits auto on week 2, are looking bright green. I’m using the entire canna line except boost, also adding 1/2 stretch recharge, silica, mammoth p.Leaves. Veins - stay green
4 years ago
1
Solved
jwesty
What do I have going on here?As you can see, the newest leaves are BRIGHT. She was flipped to flower 2 days ago, supplying her with calmag and grow big....is she lacking food? I have never seen such a thing.Leaves. Veins - yellow between
Leaves. Veins - stay green
Feeding. Deficiences
3 years ago
4
3
Solved
Granddaddy_Terp
Magnesium deficiency or something else? PLEASE HELP!Hi all! Does this look like a magnesium deficiency? This cherry cola auto is 18 days old and just yesterday I started noticing the discoloration on the leaves. It’s confusing because I’ve used this GreenGro Pride Lands soil several times in the past and I’ve never run into thisWeek 2
Leaves. Veins - stay green
3 years ago
5
Solved
Slash_Haze
LeafeCant uderstand why them looks this twisted
70 cm away 2x sp 150w is it overlight?
Or too much fertilizer?
Advanced nut ph perfect
1 ml/L micro
+ 0,7ml/L grow
Thanks in advance to who can help me !Leaves. Curl down
Leaves. Veins - stay green
3 years ago
2
3
Solved
growerflowerweed
@sweet_seeds RED POISON AYUDA CULTIVOhola necesito un poco de ayuda las dos plantas las sembre al mismo timepo pero uno se quedo mas pequeña la otra ya crecio y aplique la lst y va muy bien solo le salio en las hojas una mancha amarilla no se que peuda ser ayuda porfaaaa TENGO SUTRATO DE COCO PERLITA Y HUMUS4 years ago
1
2
Solved
Kush_queen
Help neededHelp needed
Is this a Calmag needed situation?? My ladies are 18 days old grown in coco only just had 1 dose of grow nutrients EC and PH checked no Calmag used yet 🙏🌱Leaves. Veins - stay green
Leaves. Color - Yellow
4 years ago
4
4
Solved
Albeginner420
Someone can HELP with this problem?What s going on? ph and ec on point. Could it be the water?ph 6 ec 1.6 this issue is both in hydro and in soil. The runoff of the plant in soil is ok ph 6 ec 1.6. Those plants are both at the first week of flower.Leaves. Tips - Burnt
Leaves. Tips - Die
Leaves. Veins - stay green
4 years ago
5
Solved
SmokeableHobby
Leaf diagnosis: nutrient burn or deficiency (or both)?he leaves with the burnt tips appear to be more prominent at the top of the canopy, only affecting new leaves. A handful of these leaves look a little twisted. Meanwhile, the yellowing leaves are more prominent in the middle of the plant, just below the canopyLeaves. Edges burnt
Leaves. Veins - stay green
Leaves. Color - Yellow
4 years ago
6
6