week 6.5 flowering problem

What is this? yellowing around the top leaves. im growing under a 400 W HPS and using pure blend pro bloom and cal mag. grown in water farm thanks

Im having the same problem as you it almost looks like, guy at the hydro store said it was magnesium deficiency. It just appeared on my plants yesterday, im also several weeks into flowering. Im waiting to see if these new nutrients correct flowering.

I call ph problem

ph up or down?

do you think i should go ahead and start flushing for the last two weeks now?

heres a better quality picture

im say rust spots usally a problem with ur ph in ur water... but im not physically there to solidfy my posts... but better pics would help.

Nick, the "Plant Abuse" chart in the FAQ section of this site is a great guide for plant problems/nutrient deficiencies, etc. Check it out.

That pic looks pretty bad. In my view, you should just start with brand new pH'd water and nutrient solution -- and err on the side of too few nutes until the thing stabilizes.

is that a problem with it being too high or too low?

oh btw .. most people say to flush the last two weeks(so if ur close.. jsu start flusing now to resolve the salt build-up probs), make the bud taste like it is sppose to .. not all chemically .. i do NOT want to smoke my tiger bloom

yeah, so just put plain water in my hydrofarm for two weeks then harvest? the buds on the plant are looking very nice but thsi is my first grow so im still learning a lot about it. Just to clear things up though, when you flush, the leaves will turn yellow right and this is normal correct?

Nick29 said:

yeah, so just put plain water in my hydrofarm for two weeks then harvest? the buds on the plant are looking very nice but thsi is my first grow so im still learning a lot about it. Just to clear things up though, when you flush, the leaves will turn yellow right and this is normal correct?

Click to expand...

Read around the forums before you start flushing now. 2 full weeks of flushing with a hydro setup like yours might be excessive... You could probably do to give your plant another week of nutrients and flush for 1 week instead, but that's just my opinion...

yeah i may do that, thanks