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BakedMarley
- 6
- 3
Hi guys, I'm a new grower and till my autoflower entered the flowering stage everything was fine. But since then the fresh leaves got yellow at the tips and it kinda progresses further. What do you guys think is the problem?
PlumberSoCal2
- 810
- 243
Grow days to harvest?
Grow medium?
Nutes?
Lighting?
Water/fetigation schedule?
Being an auto it might just be normal fade. All plants will use the stored nutrients in leaves as it finishes its life cycle.
Grow medium?
Nutes?
Lighting?
Water/fetigation schedule?
Being an auto it might just be normal fade. All plants will use the stored nutrients in leaves as it finishes its life cycle.
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BakedMarley
- 6
- 3
-The plant is 5 weeks old. From seed to harvest should be around 10-12 weeks.
- I'm not sure if the soil is like a light mix or all mix. Maybe somewhere in between.
- I watered the plants with a bit of a 5 in 1 biological nute mix. But not much, I'm afraid of giving them too much nutes.
- the light is a 300w led dimmed at 50%. It was hanging around 30-40 cm above the canopy. I hang it a bit higher to 50-60 cm, cause I thought it might be light stress. ( But in veg everything was fine with 30-40cm)
Light schedule is 18/6
- I am watering the plant every 3-4 days with 2 liters, when the pot feels lighter.
Imzzaudae
- 1,835
- 263
Light stressed. Move the light back to where it was before.
Beachbumm
- 103
- 43
How to Treat a Magnesium Deficiency - Growing Organic
Are your plants displaying a magnesium deficiency? Use this all-natural and orgnic method to remedy to the problem in just a few days.
growingorganic.com
Beachbumm
- 103
- 43
Magnesium deficiency, happens frequently when a plant begins to flower. What's your runoff ph?
How to Treat a Magnesium Deficiency - Growing Organic
Are your plants displaying a magnesium deficiency? Use this all-natural and orgnic method to remedy to the problem in just a few days.
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BakedMarley
- 6
- 3
Edit the fertilizer is 4.5 0.5 5.5
But like I said, I didn't use much
B
BakedMarley
- 6
- 3
Didn't test, when I want to test it, should I use only pH adjusted water or water with nutes?
LoveGrowingIt
Supporter
- 2,039
- 263
It reminds me of zinc deficiency, which can occur in alkaline soil or soil that's too acidic. So, it would help to test either the runoff pH or do a slurry test for the pH of the soil.
Good question. I'd say to start with water without nutrients to see where that leads us.
Beachbumm
- 103
- 43
Water it normally. Catch & measure the runoff at beginning and end of flow.
The info at link I sent will help
The info at link I sent will help
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Beachbumm
- 103
- 43
If you're in regular soil your pH should always be adjusted regardless if it's water or nutrients.
This site might help too
Grow Weed Easy - Learn How to Grow Cannabis with Simple Tutorials
Growing weed can be easy, though some marijuana grow tutorials make it seem like you need a degree in horticulture. Learn how to plant a seed & start growing with as little time and effort as possible, or read our advanced tutorials for monstrous yields!
www.growweedeasy.com
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Captspaulding
What’s the matter? Don’t like clowns? 🤡
Supporter
- 17,810
- 438
Light stress
Not a feed issue.
Not a feed issue.
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BakedMarley
- 6
- 3
Measured the runoff. It is about 5.9ph and only about 200ppm. Was feeding 800ppm
Stokes
- 890
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I think its a phosphorus issue mainly, a secondary potassium issue. Look to be about week 2 flower, that phosphorus in your nutrients isnt nearly enough, same for potassium but not as bad
Dont see it being a lighting issue, several shades of green, the darker ones will continue to get darker and the yellow will continue to yellow. Not the best time to be conservative with nutes, its when your plant needs them the most. If you do it will be a long flowering period
Dont see it being a lighting issue, several shades of green, the darker ones will continue to get darker and the yellow will continue to yellow. Not the best time to be conservative with nutes, its when your plant needs them the most. If you do it will be a long flowering period
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BakedMarley
- 6
- 3
Thank you guys.
To sum it up:
More nutes in general especially regarding phosphorus, magnesium and a bit of potassium.
Is that right?
And regarding the lighting, I put the lamp a bit higher above the canopy(50-60cm).
Is the intensity with a 300 watt led at 50% right?
Beachbumm
- 103
- 43
Flowering plants require more nutrients than in the vegetative state, I would start feeding around 600 PPM & slowly increase
Recommend using the Epson salt spray recipe in the first link I sent, spray just before lights out
The runoff is a little low, possibly causing the lockout.
Also look into dolomite, it raises and balances soil pH, makes life easier
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cannafarmer420
I ♥ fat colas
Supporter
- 2,995
- 263
Light stress causes that deficiency, because it is closely linked to photosynthesis. Less is more with most good lights
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