what are the brown spots on leaaves

[dougefresh]

I don't have.good pictures but on my slightly yellow leaves (prob nut deficiency) there are these little brown spots, what are these from? Please help..and can anything else cause yellowing of leaves

dougefresh Reviewed by dougefresh on 02-12-2008. what are the brown spots on leaaves I don't have.good pictures but on my slightly yellow leaves (prob nut deficiency) there are these little brown spots, what are these from? Please help..and can anything else cause yellowing of leaves Rating: 5

[HateHeaven]

you may need nutes, or you could be frying them with nutes. How old are they? Whats your medium? Have you given any nutes? :jointsmile:

[keeko]

yes, more info would be nice

[HateHeaven]

Also, check this out
Grow Marijuana FAQ, Cannabis cultivation - marijuana growing tips & photos

[dougefresh]

Heres details

Plants age: 3.5 weeks
nuts( I prob made a mistake because the leaves were yellow) but
they are on a full dosage because when I have half they were turning yellow) i don't know the ppms

Growing medium: rockwool and hydroton..(the rockwool has a little algae on it cuz I didnt cover it good enough)

Humitdy: 35%
Temp: 78 degrees

[stinkyattic]

Gotta get a pic, or fill out the troubleshooting form, or both.
Did you pre-soak your medium so that it would be at correct pH? Neither RW nor hydroton come from the factory at proper pH for cannabis. Kinda sounds like K or Ca deficiency.

[dougefresh]

Why kind of nutrient solution should I buy..what would you recomend...so brown spots on leaves means k or ca deficiency?

[dougefresh]

I was just reading on the nutrients page, that I could have calcium lock out, due to changing the PH to much? and whats an easy way to fix calcium deficiancy?