Nutes burn or Mg def? Need help! PIC Inside
- Thread starter Antojz
- Start date
jigfresh
Well-Known Member
Hey bro.... I'm not very good with this type of thing, but thought I would share my opinion.
I don't think that's nute burn. The edges would curl up more... and on more leaves.
Is this problem just on a few leaves.... it doesn't seem to be effecting the whole plant?
Antojz
Active Member
The plant doesn't look so affected by it.... But it seem that there is more leaves getting those black spot every day.
jigfresh
Well-Known Member
inhaleindica
Well-Known Member
What are you conditions in the grow room. could be heat stress, or too much potassium. Tell us a little more about your room that will help us narrow down the problem.
Antojz
Active Member
- Temp is around 27 Celsius,
- rH varies from 35 to 60
- Im using Miracle grow soil
- Using BioGrow nuts ( 1.8-0.1-6.6)
- 250 hps
- Have a oscillating fan near.
- pH is around 7
Dunno if it's because im using miracle grow soil, but my plants seems always to have heat stress/salt build up problems. I just change the light period to 12/12 about 2 days now, maybe this is the reason....
- rH varies from 35 to 60
- Im using Miracle grow soil
- Using BioGrow nuts ( 1.8-0.1-6.6)
- 250 hps
- Have a oscillating fan near.
- pH is around 7
Dunno if it's because im using miracle grow soil, but my plants seems always to have heat stress/salt build up problems. I just change the light period to 12/12 about 2 days now, maybe this is the reason....
inhaleindica
Well-Known Member
I am using Miracle grow as well. They aren't showing those signs yet in a month of my grow. Next time I am going with fox farm ocean forest.
Miracle grow has a tendency to have salt build up and burn the plants that I have read, but no signs on mine as of yet. They have time release fertilizer in there and its made for other home gardening foods. Adding other nutes could be the cause. See if you can get Bat Guano. Thats what I did and its organic high in Nitrogen and good for growth. Take it easy on the watering. Let the top 2-3 inches of soil dry out before watering again. Nutes every other watering and plain every. Phed water everytime of course. I keep mine at 6.5 to 6.8 because its mg soil. Hope this help. Good luck
Miracle grow has a tendency to have salt build up and burn the plants that I have read, but no signs on mine as of yet. They have time release fertilizer in there and its made for other home gardening foods. Adding other nutes could be the cause. See if you can get Bat Guano. Thats what I did and its organic high in Nitrogen and good for growth. Take it easy on the watering. Let the top 2-3 inches of soil dry out before watering again. Nutes every other watering and plain every. Phed water everytime of course. I keep mine at 6.5 to 6.8 because its mg soil. Hope this help. Good luck
jigfresh
Well-Known Member
Again... I'm not an expert by any means, but in my opinion your ph is too high my friend. It could be any of these nutes your plants cant uptake at a pH of 7.
Iron - Fe is unavailable to plants when the pH of the water or soil is too high. If deficient, lower the pH to about 6.5 (for rockwool, about 5.7), and check that you're not adding too much P, which can lock up Fe. Use iron that's chelated for maximum availability. Read your fertilizer's ingredients - chelated iron might read something like "iron EDTA". To much Fe without adding enough P can cause a P-deficiency.
Manganese - Mn gets locked out when the pH is too high, and when there's too much iron. Use chelated Mn.
Zinc - Also gets locked out due to high pH. Zn, Fe, and Mn deficiencies often occur together, and are usually from a high pH. Don't overdo the micro-nutrients-lower the pH if that's the problem so the nutrients become available. Foliar feed if the plant looks real bad. Use chelated zinc.