The Grow Awards 2026 🏆 
Brown spots on top leaves - nutrients, light or something else?
Dragosani666started grow question 2y ago
She went into flower, now stretching. Set light to 100%, added Bio-Bizz Top-Max and Bio-Bloom (1ml/L each).
3 days later brown spots appeared on top fan leaves, very few also on lower fan leaves.
I suspect this could be light burn or nutrient related.
Any ideas? Pls help
likes
LSchnabelanswered grow question 2y ago
I’m seeing two things right now with the plant. The yellowing of the older leaf is a result of Nitrogen deficiency. This should not happen till late into flower. Might want to give a dose of Nitrogen to your plant now while you are still in early flower stage.
The brown spots look like the start of a Calcium Deficiency and can easily be corrected by using a CalMag product. Follow the manufacture recommendations for using and you should stop seeing them.
I hope this helps.
SkunkleDamoanswered grow question 2y ago
Looks like something calmag would sort out pal
3 likes
Complain
Similar Grow Questions
Solved
mko51ss
Slow growth / malformed leavesThis is my second grow and 1st attempt at hydroponics. This is the 20th day and the symptom is very slow growth and the leaves are dark green as well as they're malformed. I am using tap water that has been filtered. I am using a total of 4TSP / 20ml of Nutrient 500ppmLeaves. Other
5y 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
5y ago
4
4
Solved
GhettoStyle
Please tell me why the veins of the leaves are so yellow!?Please tell me why the veins of the leaves are so yellow!? what could it be? zinc block or cal-mag shortage ? pH all the time was 6.3-6.5, EC first was 0.7 today when I saw the yellowness on the leaves I lowered the EC to 0.5Leaves. Color - Yellow
Leaves. Other
Feeding. Deficiences
5y ago
3
1
Solved
kevgrow
Whats wrong with the plant? Is it Male or Female?Hey guys, its day 23 I noticed this yellow spot on plant #1, overall the plant looks healthy, is it normal for it to turn that color at this stage?
Ph 6.10
Ppm 205
Feeding only 1/3 of the recommended nutrients (CalMag, Pure Blend Pro Grow)
Is it to early to detect its gender?Leaves. Other
6y ago
5
5
Solved
mangojuus
Puffy deformed leavesany idea whats causing these symptoms? the leaves are puffy, show signs og deficiency and are dry.Week 2
Leaves. Color - Yellow
5y ago
3
Solved
Rollex420
Your opinion?Today flushing the wedding cake i was thinking that the problem was an excess of nutrients, but instead water was quite clean, around 1100ppm at the first drain, after several flushes water is now on 600ppm. I also raised the lights.. I still do not understand 🤔Leaves. Tips - Burnt
Leaves. Color - Yellow
Feeding. Deficiences
5y ago
4
2
Solved
Siriuz
Is it okay at week 4 to have their cotyledons turning yellow? HelpHey there guys, I'm on day 25 and this girl was doing awesome until today, on day 23rd I had to change her to a better and bigger pot, also fed her and I noticed her cotyledons started turning yellow, they say thats completely normal idk I'm on week 4 what do u think?5y ago
1
2
Solved
ChronicGtMax
Should I lollypop this gal?Ok so there are some leaves (some of them really big) that were left underneath the SCROG my doubt is if I should trim them off (lollypopping) or if its best to leave them there to be consumed by the plant later on. Im open to suggestions 😪Week 6
Leaves. Other
6y ago
4
2
Solved
tiasmaaa
Leaves are not developing much ?The stem of my seedlings is growing well, but the leaves are not developing much. Is that bad ? When growing indoors I think you just need to put the lamp lower, but since I am growing outdoors, so with sunlight, how can I fix this?Leaves. Other
Other. General questions
5y ago
3
3
Solved
tromus_teh_tranq
Suspected Calcium Def?Think this might be the start of a calcium deficiency. Only on two of the older leaves and in similar spots on the leaves. These leaves may have also had some water on them after the last watering. Tried to remove it as best I could. Any thoughts?Week 4
Leaves. Other
4y ago
2
3
Solved
Betagemini
Hi Guys I need some advice pleas to stop yellowing all the leafs on the plant. I started feeding her with 40ml of Biocanna Flores per 10l of water 3-4times per week and 2 weeks later a I added 100g of guano. Do you thing it is Potassium (K) defeciency? or it is toomuchPhosphorus?Week 23
Leaves. Color - Yellow
6y ago
6
3
