A couple of small problems in my room.. yellowing and curl leaf issues. Suggestions?

[indagroove]

This is my second time ever growing under artificial light, so I'm still getting everything dialed in -- but I do have a couple of issues I'm hoping someone can help with.

I am growing in soil in a 32"x32"x63" tent under a 400W HPS (digital ballast). I have a 190 cfm fan for air outtake and a 60 cfm fan and 2 axial fans for intake, plus 3 fans in the tent circulating air (2 static on the floor pointing upward and one oscillating fan blowing across the top of the canopy). Temps range from 75 to 80 F at the top of the tent and a few degrees lower at the bottom.

I have 4 plants now 2 weeks into flower, which are getting cramped in the small space, but seem to be doing pretty well anyhow. Here's a pic of my girls:



They are OG Kush (rear left), Sour Buddah [Sour Diesel x Hindu Kush] (rear right), Berry White [Blueberry x White Widow] (front left), and Jack Herer (front right). My issues seem to be plant specific, and only affect the OG Kush and the Sour Buddah.

The issue with the OG Kush, I believe to be a Cal-Mag (or one of the two) deficiency. The leaves are very light green, and almost look like nitrogen deficiency, but I don't think that's it. take a look:



None of the other plants exhibit this issue. My friend who has grown OG said it's a heavy feeder from what he remembers. When I got the plant as a clone, it was pretty beat up already, and I've been trying to get it back to health the whole time, so it's not too surprising that it has a issue.

The issue with the Sour Buddah is totally different, and seems to have some leaf curl going on. Take a look:



It could be heat, but that plant isn't that much taller than the others. I have the 400W HPS about 12 inches from the tallest tip, and I thought that I should be able to get it like 8 inches without burning. Then I thought it might be a water issue. The plant needs to be watered every day, because it sucks it up quick. I transplanted it to a 2.5 gallon container last night, so maybe that will help..

Here's the Berry White looking nice:



And the Jack Herer also healthy, just younger -- Jack and OK vegged for a couple of weeks before flower compared to one month for the other two:



Thoughts?

 

[asdewqasdfgh]

all the photos have a green tinge to them, but from the looks of things you seem to have real healthy plants. as long as you water them accordingly and keep the ph levels ideal then theres nothing to worry about, ive seen plants produce bud under much worse conditions.

 

[jcdws602]

what size containers are they all in 2.5 gallon....if so you might be seeing signs of your plants being root bound,,,,what nutrients are you using.....what's your feeding regimen??what type of soil?

 

[indagroove]

all the photos have a green tinge to them, but from the looks of things you seem to have real healthy plants. as long as you water them accordingly and keep the ph levels ideal then theres nothing to worry about, ive seen plants produce bud under much worse conditions.

Thanks for looking. The pics were taking with my cell phone, so not the best quality -- sorry about that. It is hard to tell by the pics, but the OG Kush is quite a bit lighter than the rest. I only have a cheap analog Ph soil type Ph meter for now, and it's been just above 6 lately. I have a cheat digital one off ebay in the mail, so hopefully I can get better accuracy soon.

BTW, where do you guys take your temp readings from? I have a thermometer which measures from the top of the tent and also from the tent floor. I'm usually around 75 to 80 F when the lights are on, but I know that the top of the canopy is going to be quite a bit hotter.

 

[indagroove]

what size containers are they all in 2.5 gallon....if so you might be seeing signs of your plants being root bound,,,,what nutrients are you using.....what's your feeding regimen??what type of soil?

The smaller ones are in 2 gallon. The larger ones were just transplanted from 10" containers (around 1.75 gallon?) to 2.5 gal. I was thinking root bound too, but they didn't look too bad when I transplanted them last night. I was thinking that maybe they are just drying out too fast and the roots aren't getting a chance to fill the whole container.

I was just using Miracle Grow Organic potting soil mix. Using Earth Juice (mostly bloom with a little grow this week), plus some liquid kelp. Feeding them every 2 or 3 days.

I ran out of potting soil for the transplant, so used a coco coir/perlite mix with some castings and kelp meal thrown in for good measure.

 

[jcdws602]

2.5 is pretty small for how big your plants are......I would go no less than 3.5 gallon but you are better off with a 5 gallon.........don't get me wrong if you supplement feeding the right way you can get away with the 2.5 gallon but chances of issue like this are much higher and yield will be less........if they are drying out too fast they are either root bound or heat is an issue...or both....

 

[indagroove]

2.5 is pretty small for how big your plants are......I would go no less than 3.5 gallon but you are better off with a 5 gallon.........don't get me wrong if you supplement feeding the right way you can get away with the 2.5 gallon but chances of issue like this are much higher and yield will be less........if they are drying out too fast they are either root bound or heat is an issue...or more both....

I'm afraid if I put them in much larger containers they won't fit in the tent! I also have a limit on the lateral growth, since my tent is only 5 feet tall. I have a carbon filter and the fan up top taking up the top foot or so, so that only leaves me with just over 4 feet. I need a few inches for the HPS reflector and 12 inches or so between the light and the plants. That gives only around 3 feet to play with including the planters. I've been supercropping the shit out of them, so they're not quite as big as they look from the photos. They are wider than they are tall.

 

[jcdws602]

It's not how tall they are it's how much plant there is....I can see they are not that tall.....you still need to either transplant into bigger containers or feed them the right way.....you don't have to use traditional containers that are tall....something short and wide like some totes with added drainage holes will work.....it's up to you....and they shouldn't stretch much anymore...maybe you got 1 more week of lateral growth since it looks like most are developing buds already....

 

[indagroove]

It's not how tall they are it's how much plant there is....I can see they are not that tall.....you still need to either transplant into bigger containers or feed them the right way.....you don't have to use traditional containers that are tall....something short and wide like some totes with added drainage holes will work.....it's up to you....and they shouldn't stretch much anymore...maybe you got 1 more week of lateral growth since it looks like most are developing buds already....

Since I just transplanted the larger ones last night, hopefully that will help a bunch. Really though, I hardly have any room left on my floor. I'm not sure I could fit 4 3.5 gal containers along with the fans and air intake hose, but I guess I could try.

I'm kinda reluctant to transplant during flowering too much. Any thoughts/experience with that? I sure don't wanna stunt growth during budding.

It's really appreciated to have insight from more experienced growers. I've done a few OD grows, and my only other indoor grow was terribly planned from the start (no ventilation, MH for flower, etc..), so I really wanna do this right. My goal is a QP by X-Mas. Oh, and this is for medical purposes and totally legal where I live (just don't tell the feds that), not that that matters here at all..

 

[jcdws602]

It is not ideal to transplant in flowering after 2 weeks but if the pros weigh out the cons then I would definitely transplant...think about it like this at worst you stunt them a little now and still yield quality buds later or no stress now with no transplant but later into flowering you more than likely will run into more issues resulting in lower quality and quantity, if you make it to the end......a qp with those plants is definitely achievable....as long as you keep them healthy you will get more.....

 

[Sunbiz1]

The smaller ones are in 2 gallon. The larger ones were just transplanted from 10" containers (around 1.75 gallon?) to 2.5 gal. I was thinking root bound too, but they didn't look too bad when I transplanted them last night. I was thinking that maybe they are just drying out too fast and the roots aren't getting a chance to fill the whole container.

I was just using Miracle Grow Organic potting soil mix. Using Earth Juice (mostly bloom with a little grow this week), plus some liquid kelp. Feeding them every 2 or 3 days.

I ran out of potting soil for the transplant, so used a coco coir/perlite mix with some castings and kelp meal thrown in for good measure.

Uh Oh, I'll have to read the remainder of this thread but MG soil plus any other nute will cause issues.

 

[indagroove]

Uh Oh, I'll have to read the remainder of this thread but MG soil plus any other nute will cause issues.

It's MG Organic, so it doesn't have the normal chem ferts that normal MG soil has. In fact, my plants started showing deficiencies after just two weeks in the soil with no outside nutes added.

The plants look pretty much the same today after being transplanted a couple days ago. The OG Kush wasn't transplanted since it's relatively small in it's current container, but it's looking a bit greener too. I think my shipment of cal-mag will come in the mail tomorrow, and hopefully that will green the OG up a bit too.