Indoor Mephisto, HBSS - Two Tents Two different pot sizes

[peargrow]

@Waira - Thank you for taking a look at this mate nice to make your acquaintance , unfortunately my phone has just broke and I can't get any new pictures under lights out to give you more accurate pictures but I will as soon as it's fixed. I raised the lights two days ago to create a couple more inches of space as i thought as you suggested the light intensity was not helping. And as i stated i seen obvious signs of heat stress in my ladies before but I always grown photos and they are much hardier ladies and have never shown these brown marks/splashes in the middle of the leaves that are appearing now which is giving more than a little concern I took some time out last night to try to educated myself and spent some time reading in the Auto plant sick infirmary and the spot's worryingly looked very similar to Boron deficiency however I'm growing in soil ( Plagron mix ) and hand watering so it seems unlikely it could be that but i just don't know ! oh the woes of the autoflower garden -

RH is 45% and its been between 40-48 for about 6 days now however it was between 28-32 % the week before and had been around that mark most of the early grow. I have no knowledge of what RH my room should be, in different stages of the plant's lives and the effects so any info on this would be appreciated ... As one british prime minister famously said ... EDUCATION EDUCATION EDUCATION !!! -

PS We are on day 48

Kind Regards
The Pear

 

[PabloDutchflowers]

-- Pear, 'GreenSkell-- that's heat stress alright! any combo of high heat, low RH and strong breeze can put heat/water transpiration stress on the plant, causing the curling; then, the stomata close up, as the plant tries to conserve water; this slows waaay down the flow of water/nute's from the roots up to the leaves, and what can follow next is a form of defc., as the nute demands haven't decreased, but the supply line has,... BTW, HPS light is lousy for diagnostics, color rendering is poor, making reading the symptoms difficult,.. color and pattern of them are clues to what's happening,... it looks likely to be P defc., cause by the above problem,... What's the RH in there? in any case, it needs to be cooler, higher RH for sure, to get the plant back on track,... even with moist soil, it's the proximity to the lights and intensity of heat on the leaves that's stopping the flow!

Great bit of info ive had this myself never 100% knew what it was

 

[peargrow]

Great bit of info ive had this myself never 100% knew what it was

ill second that! info like this makes you a better grower in the future. Which makes gent's like Waira invaluable and the AFN community a fantastic place to be .

 

[Waira]

..likewise mate, thanks for the kind words! I got a lot of great advise and such when I cam, so I'm paying it forward,...

>> looking closer at the pics, I saw a crumbled very dry looking patch on a leaf; how far from the tops are the lights? How big is the tent/room? 4 uncooled 600W HPS is an oven mate, and I thinking more like it's light/heat frying damage, causing part of the necrotic patches as well-? that HPS light- ,... (B defc. is beyond rare, BTW).... heat and RH need to increase hand in hand, or trouble can start fast; they can hold out up to a point, but past that, it's a losing battle...that dip in RH is more than enough for those temps, and even in the 40's% RH, it's iffy,... find a way Pear, get the temp's lower at least, and up the RH... sounds like ambient RH is okay outside the tent? I've seen folks hang wet towels in tents when an humidifier isn't an option,...

 

[peargrow]

..likewise mate, thanks for the kind words! I got a lot of great advise and such when I cam, so I'm paying it forward,...

>> looking closer at the pics, I saw a crumbled very dry looking patch on a leaf; how far from the tops are the lights? How big is the tent/room? 4 uncooled 600W HPS is an oven mate, and I thinking more like it's light/heat frying damage, causing part of the necrotic patches as well-? that HPS light- ,... (B defc. is beyond rare, BTW).... heat and RH need to increase hand in hand, or trouble can start fast; they can hold out up to a point, but past that, it's a losing battle...that dip in RH is more than enough for those temps, and even in the 40's% RH, it's iffy,... find a way Pear, get the temp's lower at least, and up the RH... sounds like ambient RH is okay outside the tent? I've seen folks hang wet towels in tents when an humidifier isn't an option,...

Okay mate the tent dimension are 200cm Height, 240cm width, 240cm Length - Grow Qube. with an 8inch mix flow fan. Current Temp is 29c and 40% Humidity to be fair my temp control device hasn't recorded anything higher than 29c, What should my humidity be / should i be aiming for ?
i'll included pics of the 2 poorly ladies in this post then i'll post another reply of all 5 ladies and some shots of the tent to give you an idea of how the setup looks mate to try help provided some accurate information for you thanks a lot for helping out.

 

[peargrow]

Two poorly ladies - 1 only slightly affected/ signs occurred about 24 hours ago the main one a lot more so and about 5 days ago noticeably these both appear to have the densest buds

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[peargrow]

Pics of the tent as a whole and all the ladies

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[PabloDutchflowers]

Pics of the tent as a whole and all the ladies

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Some beautiful ladies in there mate i hope the affected ones pull through it for you bro

 

[Waira]

...better pics help, less HPS light discoloring! OK, with that, the damage I see is mostly defc. type, and the heat/low RH makes it go dry and brittle fast, which is what caught my eye last time,... best I can tell you, and I'm not an expert on lighting/indoor, (I grow outside), the temp's are on the high side, but tolerable if the RH is kept above 50% or so.. as mentioned, temp and RH have to go up together, or stresses start affecting things,... also, the ambient temp/RH is one thing, what the leaves feel closest to the lights- proximity - is another,... if you can't cool it down a little more in there and/or raise the lights, you need to up the RH, preferably both!

 

[peargrow]

...better pics help, less HPS light discoloring! OK, with that, the damage I see is mostly defc. type, and the heat/low RH makes it go dry and brittle fast, which is what caught my eye last time,... best I can tell you, and I'm not an expert on lighting/indoor, (I grow outside), the temp's are on the high side, but tolerable if the RH is kept above 50% or so.. as mentioned, temp and RH have to go up together, or stresses start affecting things,... also, the ambient temp/RH is one thing, what the leaves feel closest to the lights- proximity - is another,... if you can't cool it down a little more in there and/or raise the lights, you need to up the RH, preferably both!

Cheers mate all the advice helps me get these little bits right such as RH% Which i never paid a great deal of notice to so to clarify I should have my RH% at around 50% at which stage does RH% become to high and begin the dreaded bud rot ? 65%+ ? I'm off to get them light a little higher ! cheer Waira - on a slight tangent I don't suppose your growing out door in the tricky UK climate by any chance ?