please help with plant problems! i got pics.

[irishboy]

today i notice some problems with my plants. they all of some little rusty/redish spots on the leaves and some lite colord leaves. i dont know if its a Potassium (K) deficiency? or maybe a Calcium (CA) deficiency? i dont know please help!!!

 

[Aeroguerilla]

someone on ICMAG once told me WHEN IN DOUBT FLUSH IT OUT! hehe then do a light balanced feed a bag of espoma garden tone from agway for $10 will do the trick

 

[canadiancracker]

use the search option or check the faq's. youd get quicker response on q's like this if you do the research yourself. good luck. id say lower your ph potassium is lacking or being locked out. water left on leaves overnight or water droplets under hot hids will also cause rust spots and lead to fungus. good luck.

 

[irishboy]

someone on ICMAG once told me WHEN IN DOUBT FLUSH IT OUT! hehe then do a light balanced feed a bag of espoma garden tone from agway for $10 will do the trick

i am about to flush it, still trying to figure out what it is? all 6 plants have it.

 

[irishboy]

use the search option or check the faq's. youd get quicker response on q's like this if you do the research yourself. good luck. id say lower your ph potassium is lacking or being locked out. water left on leaves overnight or water droplets under hot hids will also cause rust spots and lead to fungus. good luck.

thanks ill give the search a try. so it looks like potassium is lacking to you? it happen 4 days after swtiching 12/12. never had water tuch my leaves,

 

[hazy]

You have a magnesium def and also a little calcium def.
You have too low of pH in your medium. Probably from adding too many nutes. Flush, and follow up with light nutes and new growth should be good.

Of course this is assuming that they are not simply underfed. I assumed that you are using some nutes, though you did not say.

 

[irishboy]

You have a magnesium def and also a little calcium def.
You have too low of pH in your medium. Probably from adding too many nutes. Flush, and follow up with light nutes and new growth should be good.

Of course this is assuming that they are not simply underfed. I assumed that you are using some nutes, though you did not say.

ya i was using a NPK 20-20-20 mix. ph was good when i watered my plants. its only on the fan leaves not new growth.

 

[irishboy]

You have a magnesium def and also a little calcium def.
You have too low of pH in your medium. Probably from adding too many nutes. Flush, and follow up with light nutes and new growth should be good.

Of course this is assuming that they are not simply underfed. I assumed that you are using some nutes, though you did not say.

maybe get some cal mag tomarrow? and feed with that?
i also read if temps drop too low in ur grow room the roots would beable to use the Mg? maybe that could be it? it got cold in my room for a few days 67F* i put a heater in their now.