STS's Jack Herer & Mystery Seed Grow Log!

Yes, i just posted a few hour ago, but i think i might have figured out my yellowing leaf problem.

I was changing my res water and when i looked at the label of the rubbermaid i'm using i slapped my self in the forehead. The container is a 20 Gal/ 76 L container. My growth formula says to use 5mL of solution per L of water (i use a cap full per Litre, thinking its gotta be close).

Having only filled my container a 1/4 of the way i was using 5 cap fulls of solution (thinking 20 x 1/4 = 4 cap fulls, round up to 5 cause they're never truly full cap fulls). I was using the Gallon measurement instead of the Litres! Totally was underfeeding my babies, yet they've seemed to really hang in their... wow, thank god DNF is fool proof.

Needless to say i've now matched the proper feed to the volume of water (76 x 1/4 = 19 cap fulls). I think this will have a dramatic impact on my plant growth, cause i've only really been feeding them a less than 1/2 strength solution! Will keep you updated with photos...

A buddy took this pic with his iPhone. Much better quality.http://i494.photobucket.com/albums/r...0601iphone.jpg

So i noticed the first signs of DRAMATIC leaf colour change yesterday on two of my Mystery Seed/Juicy G plants. My inital reaction was that the 42w CFL bulbs were too close to the plants and burning the leaves, but this discolouration effect only happened on 2 of my 8 plants and of those two only one or two lower leaves were affected.

To compensate i raised the lights another 4" from the plants, but when i returned today the yellowing edges have carried to another set of lower leaves on the same plant! I would usually reference my grow guide, but its currently on loan to a friend.

If this were a nutrient deficiency over fert burn wouldn't all of my plants be showing signs of this? My Jack Herer plants have not shown any signs of discolouration...

What could be causing this? Any remedy suggestions?

In the meantime... i'll be reading endless threads till i find out...

Thanks.

http://i494.photobucket.com/albums/r...r/IMG00610.jpg

http://i494.photobucket.com/albums/r...r/IMG00609.jpg

http://i494.photobucket.com/albums/r...r/IMG00608.jpg

So, what a week this has been.

After changing res water and topping up my feeding solution, i found alot of problem in my plants that i hadn't noticed earlier on. Alot of my lower leaves were scorched and curling (apparently the yellowing tips were just the beginning) and my crop as a whole was starting to look weak.

I panicked. I redid the whole res water/feed thing again and tirelessly searched the forums for plant problem trouble shooting. I now realize how important it is to keep an accurate, detailed grow log of my own to mark the progress and problems with my plants. After some help from Stinky (she's great ain't she) i tested the run off of my plants and found the rockwool was having a big impact on my pH. Even though i drain back to my res i had never thought to check for a change in pH... needless to say after much careful adjustment i think i've gotten it back to norm (pH 6).

Feeding had been a whole issue unto itself. Having only eyeballed my res levels before, i never had an accurate read on the amount of water i had and therefore was over doing things with my feeding solution. No wonder those roots looked a little brownish!

For the sake of recovery, i'm giving my plant ONLY pH balanced water over the next few days, then will start them at a 50% solution again. I feel like i'm back stepping here, but if it means keeping the girls alive i'll do whatever it takes. Cloning starts at the beginning of next week and I am excited to start sexing my plants a few weeks later so i can start weeding out them boyz.

On a bit of a side note, because of the problems i've experienced thus far, i've begun treating my grow like a science fair experiment. You know the things that your science teacher made you do in elementary school following proper procedures: problem, hypothesis, experiment, analysis and forming a conclusion. I know, may sound a little childish, but my take on it is that when my next grow comes around i'll have a detailed account of my trouble shooting and can see what problems i ran into the first time round (with all the ganja i enjoy, i'm bound not to remember EVERYTHING:jointsmile:)

I'm sure for most of you who keep grow logs it is virtually the same, but if I had done this kind of experiment back in the day i'm sure i would've gotten a Gold for my results :thumbsup: . Besides, keeping it in an Excel files allows me to add all kinds of images and tables, so i have a visual reference for everything!

Anyways, here's what you really want... more pics. The average height is now around 16 cm and they show no signs of slowing down. My internode distance is so small i've counted 7 or 8 already on my Juicy G/Mystery Seed! I can't WAIT to see all the bud sites...yummmm :rastasmoke:

http://i494.photobucket.com/albums/r...0625iphone.jpg