Leaf Edges turned upwards, heat stress indicated but temps are good.
I wanted to do one more mini flush in a few days however I've read it's good to give them a full nute solution at 1/4 strength immediatley after flushing.
Should I go ahead and give them the nute solution or should I just wait until I do a mini flush again in a few days?
Or should I just not do the mini flush at all. They're in 3 gallon containers and after about 3 gallons of water the ph came up from 5.7-5.8 to 6.4-6.5.
Let me know. Thank you
Leaf Edges turned upwards, heat stress indicated but temps are good.
your hps seems a good enough distance, so it cant be a heat from that.
i may suggest trying to raise your humidity slightly though (closer to 50%), as heat and dry can work together nastily at times.
Leaf Edges turned upwards, heat stress indicated but temps are good.
yowsers.. my worst plant. The biggest one, had a PH of 5.2. GEEZ!!
After flushing with about 15 gallons of water I got the PH to 6.4 and the run off was fairly clear.
I'm fairly positive the PH was giving me lockout and the salt buildup was probably the cause of my low ph. Although I'm a bit confused seeing as how I'm using organic solutions. Unless it's a combination of my tap water and the fox farms ocean forest.
How long until my curled leaves return to normal. I know it's different for each plant but about how long should I let it go before I should start wondering if there is some other underlying problem?
Leaf Edges turned upwards, heat stress indicated but temps are good.
The curled-up leaves are classic heat stress even though your canopy temps are correct. This is probably happening on the tops closest to the lights themselves, correct? Higher temps also mean lower %RH in that area and that part of the plant suffers. Keep your plants well watered and circulate air very well so that the cabinet temps are even throughout. Bend and tie the affected tops away from the lights.
SFGuerilla, you told the OP to never use tap water, and to use only distilled- this is not good advice when you don't mention that with distilled water you MUST add CalMag, and there are very few situations when a soil grower should not use his available tap water.
The 'impurities' in tap water are mainly dissolved limestone, which your plants need... unless your tap water is known to contain unusually high levels of chlorine, road salt, sulfur, or iron (these are the most common problems with tap water, but still rare for them to be bad enough that you can't use the water), go ahead and use it.
Sounds like the flush was a good idea though, and the extra holes help a lot I've found. Flushing with distilled water is effective, but don't forget to then give a watering with either distilled water + calmag and weak nutes, or tap water + weak nutes.
Leaf Edges turned upwards, heat stress indicated but temps are good.
Quote:
Originally Posted by stinkyattic
The curled-up leaves are classic heat stress even though your canopy temps are correct. This is probably happening on the tops closest to the lights themselves, correct? Higher temps also mean lower %RH in that area and that part of the plant suffers. Keep your plants well watered and circulate air very well so that the cabinet temps are even throughout. Bend and tie the affected tops away from the lights.
SFGuerilla, you told the OP to never use tap water, and to use only distilled- this is not good advice when you don't mention that with distilled water you MUST add CalMag, and there are very few situations when a soil grower should not use his available tap water.
The 'impurities' in tap water are mainly dissolved limestone, which your plants need... unless your tap water is known to contain unusually high levels of chlorine, road salt, sulfur, or iron (these are the most common problems with tap water, but still rare for them to be bad enough that you can't use the water), go ahead and use it.
Sounds like the flush was a good idea though, and the extra holes help a lot I've found. Flushing with distilled water is effective, but don't forget to then give a watering with either distilled water + calmag and weak nutes, or tap water + weak nutes.
My leaves have started to uncurl. To answer your questions it was happening to leaves low on the canopy as well as high. Not too many were but it didn't seem to matter where they were located on the plant.
I think salt build up had alot to play in this as I was also seeing the eagle claw leaves and some weird spotting elsewhere. Looks like it was the first signs of lockout probably due to PH.
And yeah I did some more reading and saw a few posts by you that you shouldn't use distilled unless you're using calmag or some equivelant. So I went ahead and just used tap water. I also rinsed off the 2 plants I did in distilled with 1 gallon of tap water each.
Thanks :thumbsup:
Leaf Edges turned upwards, heat stress indicated but temps are good.
The only concern I have with tap water is the hardness reading. Luckily my tap water runs 190-200 ppm which is the upper limit. Water harder than this is not ideal. You can also use a combination of RO and tap water to lower your ppms.
I use RO water for my moms and vegging plants, but add calmag.
Leaf Edges turned upwards, heat stress indicated but temps are good.
The curled-up leaves are classic heat stress even though your canopy temps are correct. This is probably happening on the tops closest to the lights themselves, correct? Higher temps also mean lower %RH in that area and that part of the plant suffers. Keep your plants well watered and circulate air very well so that the cabinet temps are even throughout. Bend and tie the affected tops away from the lights.
Stinky! Wanna job? Your dead On! The circulation,of a air in that particular area of the room would solve your worries! Relative Humidity. It moves about the room like a Ghost! You can't see it.. But you can surely see the affects of it..%RH..
Leaf Edges turned upwards, heat stress indicated but temps are good.
Quote:
Originally Posted by GaGrown
The curled-up leaves are classic heat stress even though your canopy temps are correct. This is probably happening on the tops closest to the lights themselves, correct? Higher temps also mean lower %RH in that area and that part of the plant suffers. Keep your plants well watered and circulate air very well so that the cabinet temps are even throughout. Bend and tie the affected tops away from the lights.
Stinky! Wanna job? Your dead On! The circulation,of a air in that particular area of the room would solve your worries! Relative Humidity. It moves about the room like a Ghost! You can't see it.. But you can surely see the affects of it..%RH..
Actually it was a PH issue. After the flush the leaves went back to normal.
And I have PLENTY of circulation in that room. Check out my grow log for a pic of the cab recently. It has a 20" box fan for the intake pushing at it's highest setting (3000 cfm), another 20" box fan for exhaust at it's highest setting and then like a 12" oscilating fan.
Problem was definitely PH. Although it looked like heat stress it did not seem to be likely to me.
Everything is back on track now.
Leaf Edges turned upwards, heat stress indicated but temps are good.
Quote:
Originally Posted by daihashi
Actually it was a PH issue. After the flush the leaves went back to normal.
And I have PLENTY of circulation in that room. Check out my grow log for a pic of the cab recently. It has a 20" box fan for the intake pushing at it's highest setting (3000 cfm), another 20" box fan for exhaust at it's highest setting and then like a 12" oscilating fan.
Problem was definitely PH. Although it looked like heat stress it did not seem to be likely to me.
Everything is back on track now.
When you flushed them..... You actually raised the RH in the room. So it was a humidity issue. I stand by that.....:thumbsup:
Leaf Edges turned upwards, heat stress indicated but temps are good.
Quote:
Originally Posted by GaGrown
When you flushed them..... You actually raised the RH in the room. So it was a humidity issue. I stand by that.....:thumbsup:
I'll have to disagree again. My RH was and remains approx ~ 40%. give or take 1-2%.
Even after flushing them my RH did not rise that much.
Not to mention I had multiple symptoms. Leaf edges curling up, random spotting, eagle claw leaves, leaves dying.
I'm just confused as to how you can stand by saying it was a humidity issue when humidity was always within an acceptable range and then when I flushed it you still insist it was a humidity issue.
My soil run off was far below that of what these plants need in order to uptake nutrients in soil.
Even if I had solely just added moisture to the room via a humidifier it would not have resolved my problem.
Potassium is best absorbed in soil from ph 6.3-6.8. My ph was about 5.6-5.2.
In order for the stomata to open potassium is needed. K ions make their way into the guard cells adding rigidity opening the stomata.
Transpiration is also achieved through the stomata.
If the stomata are not opening, or not opening enough due to lack of potassium uptake because of a ph problem then the leaves will not be able to properly release moisture in the air; thus leaving the plant with poor means of cooling itself naturally. The result? Leaf edges curling upwards looking like heat stress when it's really a PH issue.
Imagine if all your pores closed completely on your body. Imagine your nose plugged, mouth sown shut and your erm.. butt corked up as well. Then go stand in a very bright concentrated light where the temperature is about 85-90 degrees. Now throw a box fan in front of you. That box fan would do you no good since your body would not be able to physically release heat from within.
The other symptoms I saw were also due to ph issues. As I saw multiple nutrient deficiency symptoms. Most nutrients are best absorbed in soil at a range of 6.3-6.8 as shown here in this chart
Had I not had multiple issues happening at the same time I may agree with you, but I'll have to say here that I do not agree with you.
You replied to this post 16 days after I had done a flush. RH wouldn't stay up for over 2 weeks based off 1 flush.
I don't mean to be rude and I am not trying to pick a fight but if you're going to stand by that then I'm going to have to ask you to back your reasoning with something more than reitterating something said by Stinky.
I'm sorry for seeming brash and I'm sure you have loads more expierence than I do but I went through alot of trouble to understand why my plants were having problems and how everything was linked together. If there is an alternative possibility that can be explained from a micro level to the symptom then I'd like to hear it. Otherwise I've already shown that this was not a simple RH issue.
Just so everyone knows I'm not on the attack. I just want to know as much as possible in as much detail as possible. I'm actually quite friendly and I mean no hostility toward GaGrown by this post.
Time for some medicine :jointsmile:
