Very young bud leaves curling down

[oldog]

Very young leaves have started to curl down as in the photo, during the last week. Plants are on ebb and flow, in one gallon pots with hydroton, 9 weeks old, from clones in rockwool, 4 wks on 12/12, 18" away from 400 watt HID, nutrient 10 days old, strength as recommended by general hydroponics online calculator, pH 6.1, 1602 ppm , Pump floods 10 min, drains in 30 mins, 4 floods daily, Room temp mid 90's in day, humidity 60-75 %, room very well ventilated. Fan blows over lights , leaves rustle. There have recently been a few of the usual short summer power cuts .
All young leaves, under all the flowers, look like the photo, both close to and far from light. These plants look very sick like they are dying, buds are growing very slowly if at all. Large leaves look fine. Whats wrong ?

 

[ibjamming]

Nutes way to strong...IMHO... Is that a sativa? They like half or less strength.

 

[oldog]

Thanks- yes these are Canadian about 80% sativa- have not been happy with them in dirt or now in hydro. Exellent but v. low wieght yield. On half strength for last 2 days and glad to hear you think the same. Is four feedings a day (per 12 hrs) too much ? Sativa take longer they say- how long to harvest from appearance in photo do you think ? What strength nutrient up to harvest ?

 

[ibjamming]

Slow down...get them growing right first...then worry about the rest. I'd go 1/8-1/4 strength and see what happens...if they want more in a few weeks, give it to them. They just may like it weak...

 

[oldog]

Thanks lots- down to 1/4 strength now- I'll come back and report
in a week or two.

 

[oldog]

update - overfeeding

update - overfeeding

Its now 15 days since nutes were reduced to 320ppm to correct overfeeding
and these Blueberry/Hawaiian buds are all still looking terrible. No resin showing, and no growth at all. They are in their 7th week of 12/12. What the heck should I do? I'm running out of time. 2 weeks left ? 4 weeks ?

 

[darookie2000]

Very young leaves have started to curl down as in the photo, during the last week. Plants are on ebb and flow, in one gallon pots with hydroton, 9 weeks old, from clones in rockwool, 4 wks on 12/12, 18" away from 400 watt HID, nutrient 10 days old, strength as recommended by general hydroponics online calculator, pH 6.1, 1602 ppm , Pump floods 10 min, drains in 30 mins, 4 floods daily, Room temp mid 90's in day, humidity 60-75 %, room very well ventilated. Fan blows over lights , leaves rustle. There have recently been a few of the usual short summer power cuts .
All young leaves, under all the flowers, look like the photo, both close to and far from light. These plants look very sick like they are dying, buds are growing very slowly if at all. Large leaves look fine. Whats wrong ?

WAY too hot. Try to get it at or below 80. Make sure your cubes are drying out before you water them again, you could be overwatering (maybe not with that much heat, but gotta make sure you've got some nice, white, healthy roots). Are you using cal-mag of any kind? Those twisted leaves happen with stress and sometimes calcium or zinc deficiencies. That's what my clones looked like when I took them a couple weeks into flower, but it was from stress.

Also, check the res temperature, I didn't see that listed.

 

[oldog]

I'm on the edge of the Everglades- thats the temperature !
Got fans going- no AC. WHAT CAN I DO ? How about flush them with
straight 6.0 Ph water for a few days and then hit them with a little Bloom ?
They need a slap. What about turning off the light for 2 days ?
Right now I think these are going to be dumped unless something radical is done. I dont see a bead of resin on them.

 

[lysol]

Light intensity is proportional to nutrient usage, the more light you have on them the more nutes they can take. So cutting off lights would be bad, keep as much light as possible. I'm afraid you might have to chaulk this one up as a loss, I'd keep ppms as looow as possible, i dont know much but i know that is very progressed overferting, that plant is clinging on for dear life

 

[oldog]

" the more light you have on them the more nutes they can take "

This is definately so ! there are 2 tables - 175 W and 400W -the 400W table
is much worse. I'm going to cut down to about 100ppm.
Dont know how this happened- I got the dosage from the General Hydroponics
site for the nutes I am using.

 

[ibjamming]

Just because there's no "frosting" doesn't mean the weed will be weak... I would let them finish. Cut your ferts down to 1/8 of what you were feeding them.

 

[oldog]

" no "frosting" doesn't mean the weed will be weak "

Thanks - I pray that it may be so !
As granny used to say ' the proof of the pudding is in the eating '
so we'll see.

Now on straight RO water @ 6.0 - about 125ppm.
That reading is from straight water plus whatever was left
in the hydroton the last time it drained. Will keep them on
that till harvest - there's no time left to go back on nutes
before harvest, so will just hope for the best.
I'll post photos of the outcome in a few weeks.
Thanks to all for the feedback.

 

[ubet28]

Remember the atmosphere counts for more then any nutes you can give. Get those temps down to at least the low 80's.

 

[oldog]

How can I lower the temp. ? Would have to buy an AC just
for a month till it gets cooler here. Whats the big deal about heat and herbs ?
It grows naturally only in places where it is hot like @#$@%*#.
Who said it has to be grown at such and such a temperature ?


Respect to all !!

 

[ubet28]

How can I lower the temp. ? Would have to buy an AC just
for a month till it gets cooler here. Whats the big deal about heat and herbs ?
It grows naturally only in places where it is hot like @#$@%*#.
Who said it has to be grown at such and such a temperature ?


Respect to all !!

You asked why the plants looked like that i told you. There are several ways to fight heat. Fans. Also by having the lights on at night time verses the day time. You say the temps will drop in a month. I know personally i don't grow 3 months out of the year cause i just don't want to have to fight the temps. So keep that in mind.

 

[lysol]

It grows naturally only in places where it is hot like @#$@%*#.

the weed that grows in those places is called ditch weed mate, the idea is to 1 up nature, having huge differences between day and night time also streses the plants and could cause humidity to reach dangerous levels. 75 degree F 50% humidity ease way up on nutes, keep fresh air in there and the plant will get better. hot ballasts & heat in general raise humidity and stomatoe close up

 

[darookie2000]

You asked why the plants looked like that i told you. There are several ways to fight heat. Fans. Also by having the lights on at night time verses the day time. You say the temps will drop in a month. I know personally i don't grow 3 months out of the year cause i just don't want to have to fight the temps. So keep that in mind.

I stopped using my aero cloner in the summer due to res heat issues. It was my first attempt at using this cloning method, and I had some success but the res heat issues killed a few of my clones after I failed to clean the res soon enough. Sometimes the temp just makes it unrealistic to grow without an investment in AC, I definitely agree

 

[darookie2000]

How can I lower the temp. ? Would have to buy an AC just
for a month till it gets cooler here. Whats the big deal about heat and herbs ?
It grows naturally only in places where it is hot like @#$@%*#.
Who said it has to be grown at such and such a temperature ?


Respect to all !!

Different strains have different responses to high temperatures. Some strains are much more sensitive than others to high temps. It does grow in places with occasionally high temps, but outdoor is not the same as indoor. Outdoor you have way more light and a bigger rootball, and more fresh air. If you added CO2 earlier on, you might have been able to run the temps a bit higher, but 95 is way too hot. Growth almost completely stops at high temperatures. Who said? The plants.

 

[Hash Zeppelin]

Heat is probably your main factor here, I would say. Also, like I just said in another thread. If it is DJ shorts blue berry genetics in there then the funky looking curling might be natural. But I guarentee bring those temps down 15 degress and you plants will be much happier. mid 90's is way to hot. I like it at 80 in the day max.

 

[oldog]

OK all you HEAT guys - so why is it that there are two little scrog tables
in the same room everything the same except that one has a 400W and one a 175w both set at a height to give the same candlepower on the canopy with my v.cheap light meter, and the 400W table looks terrible while the 175W looks not perfect but darn good. Maybe as you said lysol, more light more nute intake. If any flowers on the 400 table look better its the ones on the outside edges/periphery- ie less light or heat. Unless, shamefully I gave the 400 one a double dose of nutrients in error. Who knows !
I think I will plan in the future to close down for the summer. It would be good to have some time off too, instead of fussing over them every day of the year. Thanks to all !!