The Grow Awards 2026 🏆 
N or Mg lacking ? :(
Robertsanswered grow question 5y ago
Purple is a sign of too cold. Nitrogen deficiency starts at bottom turning leaves yellow to top. If leaves are yellow on canopy and not rest then it is light stress. Plus .004 is really light on water. Good luck and happy growing 🌲🌲🌲👊
Similar Grow Questions
Solved
GreenBean
leaves seem a bit dark green have cut down nitrogen and theres a good amount of phosphorus and new growth is pretty purple and stems are very purple im pretty sure its something to do with feeding, are plants still missing something? or should i just leave them and see what comes6y ago
1
1
Solved
OneBakedWalrus
Weird colors on leaves of buds of second Short RiderI've noticed purple starting from the leaf tips it looks like down the leaf heading towards the stem. Is my girl sick or is this nutrient drain off the leave? I'm leaning toward sick but she's still packing on weight daily. Advice?? I have between 10 and 20 days til "done" approxLeaves. Color - Dark-purple
Plant. Other
5y ago
2
3
Solved
Poz83
Why is has my plant gone purple when flushing for harvestSo I have been flushing Blueberry Cheese for 9 days now, buds arent compact so thinking maybe this is an autoflower? Anyways, since flushing the stems, buds and leaves are going purple and my PPM and EC is still very high in run off. Any Advice pleaseBuds. Other
Leaves. Color - Dark-purple
Plant. Stem - Red or purple
4y ago
3
4
Solved
JoniSim
Help pleaseWhat do you think is happening? Lots of nutrients in the soil or is it something elseLeaves. Color - Dark-purple
2y ago
3
3
Solved
Subpar_Zeuz
Autoflower Selective Harvest?Should I do a selective harvest on an autoflower? My plant overall is pretty uniform in height outside the main. Is it safe to harvest so that I can drop my light to give the rest of the plant the light it needs to finish strong?Leaves. Color - Dark-purple
10mo ago
2
3
Solved
Indica_Jones
Purpel oder mengel ?Prupeln meine Goriilla Zkittlez oder ist das ein Mangel oder Problem ?Leaves. Color - Dark-purple
Leaves. Color - Dark-brown
Leaves. Color - Black or grey
5y ago
2
2
Solved
Daweed83
Tip of the leaf turning darkYo guys! Just spotted this stain on the leaf today. Not sure what it is if its good or bad? Any opinions on this ? Thank you 🙏🏽🖖🏽Leaves. Color - Dark-purple
5y ago
2
2
Solved
tangie
Dark purple areas on leaves — genes or environment/feeding problem?What the heck is this? Is it just purple genes or a stress/deficiency or a combination of multiple factors?
I have checked three visual cannabis plant health guides, and did not find a single issue which looks like this. Maybe a combination of 2 factors, but I'm not convinced 😐1y ago
6
6
Solved
Deejay_scuff
Leaf diagnosis 3wk flowerUrgent!! Help needed!
My leaves on one plant are turning purple and not looking great. I can't seem to narrow it down. I was planning on a kelp foliar spray but read not to do it past 2 weeks of flower. Anybody know what to do? I'm at a loss and don't wanna throw nutes at herWeek 11
Leaves. Color - Dark-purple
4y ago
4
Solved
NewbGrower87
N tox in full swing. Lowered feeding from 1 Tsp to 3/4 Tsp Cal/Mag, and Grow/Micro from 1/2 Tsp each to 1/4 Tsp each. Hoping this helps correct.
Is it possible that overwatering also contributed to excessive N uptake? I let the coco dry out a lot more (~4 days) this time.Week 4
Leaves. Color - Dark-purple
7y ago
1
1
Solved
Edwardlongshank
Telos 10 Pro LED Grow Light - 285 Watt' - 1.2 Indoor Tent. Temp 24c - 18-6 lights PH 5.8 CoCo. Day 15 Photoperiod. Not looking good first attempt any ideas how I can get these back on track?Leaves. Color - Dark-purple
Feeding. Other
5y ago
1
Solved
JLN_08
HOJAS MORADASEmpezaron a ponerse moradas las hojas pero no se si será escasez de fosforo según lo que me estuve informando, o si directamente será frío. Esta en el mismo armario con otra planta y ella no se a visto como esta,entonces se escuchan las posibles soluciones !Week 10
Leaves. Color - Dark-purple
4y ago
2
2
Solved
MrGreenMan
How are they looking? Think she had light stress last week so light is much higher nowHey everyone, my Dark Devil Auto has has dark green leaves for weeks now and is now showing purple under her leaves. Just wanted to know people thoughts? I’m only giving 450ppm to all plants with GHE FloraTrio in line with their feed chart and some bent tips due to small tent!Leaves. Color - Dark-purple
5y ago
1
Solved
Waters
Do those leaves look a little too dark green and slightly waxy? May have to lay off the nitrogen I think.Week 12
Leaves. Color - Dark-purple
7y ago
1
Solved
Jayann
The insides of a small number of future bud sites are showing some strange purple discoloration. My initial thought was that this could somehow be mold however under the microscope it is very purple. Any ideas or suggestions would be greatly appreciated. (see images week 11)Week 11
Leaves. Color - Dark-purple
6y ago
3
9
