New Grower Pale tips and more on Fantasmo Express

[Dewey Matter]

So I posted this on my Grow Journal - there are many more details about the overall grow there. https://www.autoflower.org/threads/mephesto-group-grow-scene-1.69019/

Well I'm concerned with FE1 - she's been stretching a bit and the new leafs (which I assume are the cola-containing stems) are a bit pale at the edge and oddly formed. A few other new leaves have a slight patterning to them.

• Watering after drying out significantly, around every 3rd day w/ CalMag, recharge, 1/3 Big Bloom and 1/3 Grow Big pH 6.2. Not adding the P containing Tiger Bloom yet - though they suggest adding beginning week 5, the light flip for photos.
• Soil pH is ~6.5
• There has been more direct fan on her this week.
• Lights were raised a few inches the other day
• Temp 20h/78-80F 4h/70-72F RH averages 55%. However outside temps have been all over the place (20F to 65F this week) and have made continuity difficult.

She's the only one effected thus far - I pH everything going in to ~6.2 etc...just not certain what this is.

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[Dewey Matter]

Sorry for the pic links (can't seem the edit it in Chrome).

 

[Dewey Matter]

Well in the absence of any new info, I've opted for the following:

• Since one of the things that went wrong this week was very high humidity at times (80%) - remove humidifier from tent, decreasing RH to 50's and stop water spray from humidifier/fan combo.
• Fan redirected off plants.
• After watering last night with the "normal" amount, I didn't see runoff as usual; pots still felt a bit light still. Watered again this afternoon with 1/2 normal volume (50% CalMag first, then 50% w/ nutes as suggested for week 5 from , but 1/3 concentration ~650ppm) pH to 6.0 - runoff seen on each pot.
• Increased overall ventilation (turning up in-line fan, added an additional intake on the side).
• Raised the lights just a couple more inches, adjusted intensity down just a tad (FE1 has stretched a lot in the past week, much bigger/taller).
• Rotated pot positions, orientation.

Well I'll be waiting to see how things progress tomorrow. As a group I do think they look a little happier, but who knows at this point.

 

[STILLSMOKIN]

Well in the absence of any new info, I've opted for the following:

• Since one of the things that went wrong this week was very high humidity at times (80%) - remove humidifier from tent, decreasing RH to 50's and stop water spray from humidifier/fan combo.
• Fan redirected off plants.
• After watering last night with the "normal" amount, I didn't see runoff as usual; pots still felt a bit light still. Watered again this afternoon with 1/2 normal volume (50% CalMag first, then 50% w/ nutes as suggested for week 5 from , but 1/3 concentration ~650ppm) pH to 6.0 - runoff seen on each pot.
• Increased overall ventilation (turning up in-line fan, added an additional intake on the side).
• Raised the lights just a couple more inches, adjusted intensity down just a tad (FE1 has stretched a lot in the past week, much bigger/taller).
• Rotated pot positions, orientation.

Well I'll be waiting to see how things progress tomorrow. As a group I do think they look a little happier, but who knows at this point.

I just saw this and was going to ask how high humidity was.

 

[STILLSMOKIN]

My fan leaves were laying on a couple and sweating, done the same thing

 

[Waira]

... she looks a little cooked, some mild N toxicity,... pH of soil, how did you take that?
.... don't let the wet/dry cycle go to extreme, any kind of dry is bad news for both pH and relative conc. of nutes in there,... some surface drying is OK, but never a full pot drying, making it feel really light, that's too much... damages roots as well,...
.... high RH5 can mess with things, but mainly it makes transpiration rates go too low, ppor evaporating off leaves, slowing the draw of water/.nutes from roots up,... I don't think it play that much of a role here, given the symptoms (mild tip burn, leaf curl from N tox')....
... Big Bloom is OK at full strength if you like, it's not really a fert', look at the puny NPK#'s,... in the decimals, very weak! it's good stuff though,... the name is BS though never understood that!
... ease off the nutes for few days, maybe even switch over to Tiger (lower N, still have all the secondary and micronutes),...

 

[Dewey Matter]

... she looks a little cooked, some mild N toxicity,... pH of soil, how did you take that?
.... don't let the wet/dry cycle go to extreme, any kind of dry is bad news for both pH and relative conc. of nutes in there,... some surface drying is OK, but never a full pot drying, making it feel really light, that's too much... damages roots as well,...
.... high RH5 can mess with things, but mainly it makes transpiration rates go too low, ppor evaporating off leaves, slowing the draw of water/.nutes from roots up,... I don't think it play that much of a role here, given the symptoms (mild tip burn, leaf curl from N tox')....
... Big Bloom is OK at full strength if you like, it's not really a fert', look at the puny NPK#'s,... in the decimals, very weak! it's good stuff though,... the name is BS though never understood that!
... ease off the nutes for few days, maybe even switch over to Tiger (lower N, still have all the secondary and micronutes),...

So a few peeps have asked how I'm measuring soil pH - both in-soil measurement and less often now, run off. One thing I didn't notice until this mid-week is that they are drying out way faster than just a week ago. Several were very light this morning, with these 3 gal pots, I'll be watering everyone other day at this point. Just watered everyone again, as suggested just Big Bloom, CalMag, Recharge - plus 1/3 concentration of Tiger Bloom for the two heading into flower. Everyone was watered to runoff and I took a quick pH reading of that ~6.5 (pooled readings - right now everyone drains onto 1 of 2 large rubber mats).

I do believe the VPD issues were stressing the plants, they were also drying out faster than I had anticipated and it was suggested that using something like Recharge the entire grow allowed for too much nitrogen uptake in sensitive plants, even at the lower concentrations I was using (I do have air pruned roots all over the bottom and sides of the pots). Without direct experience, I can't parcel out if all, any or other factors were the root cause - just try to keep the variables under scrutiny. We grow, we learn and I'm learning a lot on my first one - thanks for the assist.