The Grow Awards 2026 🏆 
Question
2020Growerstarted grow question 5y ago
Anyone know what it’s deficient on?
Solved
Leaves. Color - Yellow
likes
horsemouthanswered grow question 5y ago
it could be a magnesium deficiency (especially the second picture). i looked your nutes and and dont know them, so if they contain magnesium forgot what i wrote.
under powerful leds, in my experience, plants need more magnesium and potassium than under hps or older leds.
cheers
Similar Grow Questions
Solved
AutoZone420
Yellowing Week 4Is the yellowing present in Week 4 of any concern?Week 4
Leaves. Color - Yellow
6y ago
1
1
Solved
1stmanny
older leaves are turn yellow. should i top dress,Hi Growers !!
Is this normal for autos, there 64 days old, 21days to go, there in soil and the ph is 6.7 Dry organic Nutrient, most of the bigger older fan leases are turning yellow. I feed them around week 4-5, should I Top dress my Pots? and add a Lil more Dry Nutrient6y ago
7
4
Solved
Mr_weed_pt
Leaves dyingHaving some trouble with my runts.started last week some of the leaves drying and becoming yellow. My ph is correct and I am using biobizz as nutrients I don’t give full strength . The temperature is high because is summer time here some times get to 30*c .Week 11
Leaves. Color - Yellow
4y ago
3
3
Solved
Bennygen2
Is this nutrientsDoes this look like a nutrition problem? Grown in bio bizz light mix she's a zkittlez authaven't done grow diary yet so can't link she's just gone on to 1ml per l of bio grow and has always been cal.mag also used pirana and nevana from advanced nutrients any help would be awesomeLeaves. Color - Yellow
Leaves. Color - Mottling
Feeding. Deficiences
4y ago
1
2
Solved
elevensixty6
Still to early to tell? Noticed yesterday and have slightly worsened today. Not sure the issue but potentially magnesium? Getting close to top dress also.Only on 1 of 3 plants so far. On older growth after getting dose of Recharge the other day. Maybe an N problem as I also use 484? Or mag? Using CalMag every other watering in RO at 150ppm as the soil has some cal and mag. Also getting close to top dress time maybe something else?3y ago
4
Solved
Carpe_Diem
The most common yellow leave will be found on the terminal stage of flower because plant will power up for flower produce rather leave grown. Leaves are most of the time a reservoir of H2O nutrients and minerals.
Yellow leaves can apear on you plant at some point of grow?Week 10
Leaves. Color - Yellow
8y ago
4
2
Solved
Jamadeen
Lower leaves are yellowing and dyingLower leaves are turning yellow and falling off, i know of the top of my head it might be Nitrogen deficiency or imroperly balanced PH but i use the same ammount every time which comes out at about 6,3, checked with chamical and digital device, more nitrogen added but no result.4y ago
2
Solved
caitbella16
Pluto Auto from Ethos leafs yellowing from bottom up? Help??With yellowing climbing up from bottom to top mixed with brown spots and new smaller growth looks stunned about 5 days after giving a lil nutrients what would your opinion be on what’s going on here?
Any advice helps, and thank you in advance.
Pluto Auto week 6 day 25y ago
1
1
Solved
Nellyitis
Hi First time grower. My Gsc's fresh leaves are real light green is that normal? Cheers.Week 1
Leaves. Color - Yellow
7y ago
2
Solved
ManiPawPatrol
AUTOS FASTBUDSHow are they looking ? 14 days from seedLeaves. Color - Yellow
4y ago
2
2
Solved
Chubaka26
Yellow leavesShe is auto jack herer feminized, 4 weeks old. It started getting the leaws yellow, what is happening? What should I do?Leaves. Color - Yellow
Plant. Too short
3y ago
5
5
Solved
Kush_queen
Advice/help needed any suggestions nutrient deficiencyHelp I had some leaves at the bottom of the plants go yellow so I got calmag and used 2 ml per litre as suggest I have given them that twice but I am still getting some claw leaves and some of new leaves look yellow at the tip tiny amount? How often should I give calmag?? 🙏🙏5y ago
3
5
Solved
guerilla
Defiancy or excess of something??Hi all.
I think this is a deficiency. Funny yellowing in leaves..
But can I get a 2nd opinion please.
,💚Leaves. Color - Yellow
Other. General questions
Plant. Other
4y ago
4
3
Solved
Donparmigiano
Bottom leaves lifeless and yellowHi! My plants are in their 2nd week of flowering and some of the leaves at the bottom of the plant (very few in the middle) are starting to turn yellow and they look kind of lifeless. It's very dense in the tent so maybe they don't have enough light? or lack of nutrients ?5y ago
5
5