I F'ED UP... Please Help!

[Dorje113]

Experience: Moderate

E-indoor or outdoor indoor
E-soil, soilless, coco, aero, or hydroponic soil
E-specific medium Fox Farm, Roots, Coco and Perlite, all about 25%
SCL-Anything you have added to the soil small amount of hydrated lime, Humbolt Myco Madness
SCLR-Soil or slab runoff pH 6.7
E-Water source lukewarm filtered tap
E-Source water pH 7.3
E-Age of plant not sure, but prolly 4 weeks
E-Type of fertilizer none yet, just some superthrive
E-Rate of application (if hydro, this is your PPM number, preferably after each component is added) watered only once so far
E-Lighting source and distance from plant1000 hps, 18"
E-Air temperature (both day and night if you are running a dark period) 80/70 F on 20/4
E-Air % Relative humidity not sure, about 50% here in CO lately
E-Lighting schedule20/4
E-Type of ventilation your room has8" in/out 8" maxfan, carbon filter, routed thru hood

I got the plants (7 days ago) in hydro, planted in 1 gal pots (5 days ago) with small chunks of rockwool. They looked good, but had yellow growing tips, this issue has improved since re-potting in soil, but the curled-down leaves are the issue...

I transplanted them to 20 gal smart pots in my soil mix, they're sitting on a bed of lava rock in a big 21" diameter tray. The 20 gal pots are 3/4 full.

I started training them to fill in my space (3 plants in a 5'8" x 4' space), prolly too soon after I transplanted them because it didn't seem to bother them. They were rootbound in the 1 gal pots.

The abnormal growth started after I moved a fan and co2 into the room. I may have dosed them with too much co2, as I didn't need much air exchange because temps were staying low.

To remedy the problem, I shut off the co2, increased air exchange and decreased the fan speed to low on the circulation fan (20" box fan)

I think I just stressed them with transplanting, training, and way more air circulation and light than they were used to, but this is my 1st garden in this space, and the 1st I've had in many years. I'd love to hear some analysis and advice as this is stressing me out!

THANKS!!!

[Dorje113]

Strains are Sour D, Snow Cap and Flo. The Sour D was the last to show abnormal growth, the Snow Cap was 1st, but was also the worst off (as far as yellowing growing tips) when transplanted.

[Dorje113]

Showing some signs of recovery in 24 hours.

Sour D looks a lot better but Snow Cap is slower to respond. Flo somewhere in between.

I'm also looking into a plug n grow igs-220 co2 / temp / rh controller.

I probably cost a few days to a week, but with any luck they will make a full recovery. I'll post pics in a few days

I've never tried to grow in such a small space, looks like it'll be a bit more of a challenge, but a co2 / temp controller should help...

[moody420]

you transplanted from a 1g to a 20g pot? why so big? are you putting these outdoor?

[Dorje113]

Bigger Pot = Bigger (& Better) Pot :thumbsup:

[moody420]

Bigger Pot = Bigger (& Better) Pot :thumbsup:

I don't really agree with that....20g is a huge size! how many plants are you growing? If you are cramped for space, I would suggest using a 3-4g pot. Indoor is alot different than outdoor! How long do you plan on vegging?

[irydyum]

Those pictures look to me more like a watering too frequently issue. Give us an idea about your watering habits, how often/much, how long does soil take to dry completely (if you know).

The leaves don't look bad, just saggy. That's what suggests the watering issue to me. Sagging like that usually equals under/overwatering. Cannabis roots need plenty of oxygen, especially in container gardening:thumbsup: Water displaces oxygen in the soil. Try to do your watering at lights on, if it looks like it needs it really late in the light cycle, wait till the next lights on. It will encourage some evaporation throughout the day, also it should let some oxygen in the soil by lights out. Roots use oxygen during the night cycle. If you keep the medium too moist, eventually root rot and a number of other things can put you past the point of no return. Weed has much better chance of surviving drought than drowning.

I say, let em get bone dry and see if they perk back up.

[Dorje113]

I don't really agree with that....20g is a huge size! how many plants are you growing? If you are cramped for space, I would suggest using a 3-4g pot. Indoor is alot different than outdoor! How long do you plan on vegging?

3 plants in about 20 sq ft. of grow area. Looks like about a month of veg.

For a bigger system I'd normally use beds that hold 150 gal of soil per 1000 W light. :D It sounds like a lot of soil but there are some big advantages to growing with that much dirt... like yields in the 3 lbs per 1000W range. :rastasmoke:

As far as overwatering, they are in a light soil mix and were only watered once until saturation when the plants were transplanted. I watered them a 2nd time 5 or 6 days later with only filtered water and superthrive, but didn't let the plants get too dry because of the recent transplant. Next time I'll let them dry out a lot more.

They seem better since I cut co2 and increased air exchange, but only time will tell...

[Dorje113]

Best I can tell it's a zinc deficiency caused by high pH.

I watered with plain water with a pH of 5.5, the water seeping through came out to the low 6's.

I assumed my tap water was 7.3, which is common to the area, but it was actually 8+.

It's been 36 hours and it seems like it's getting better.

[Dorje113]

All is well, but I couldn't find a definite cause. The soil pH was a little high, but not enough to cause any problems. Soil is now mid 6's, down from about 7.

I'll have to chalk it up to transplant stress going from a large amount of rockwool at low pH to soil at a full pH point higher and them having to get used to their new environment. But, those were the plants I had... in the future I won't try to transplant larger plants from hydro to soil.

Here's pic of some Flo looking good...