Leaves twisting (slight cupping as well?)

Strain: Papaya
Medium: Hydroton in RDWC
Nutrient solution: RO water, GH Flora 3 part and calmag. 64 to 67 degrees, currently sitting at about 335 ppm, pH 5.5 to 5.8 (initially had some rapid drift related to low ppm and improperly soaked and rinsed hydroton but has stabalized)
Light: CLW Solar Storm 440 about 24 inches above the plant
Environment: Temp at top of plant 73 to 77 lights on, 66 to 68 lights off. Humidity between 38% and 53%, mostly sitting around 40%
Space: 3x3x6 tent.
Ventilation: In- 4 inch 100 cfm booster fan with particulate filter. Out- 4 inch Phresh carbon filter to an Apollo 4 inch inline fan (don't remember the cfm on this one, but way more than I need for this tent)

So the pictures kind of suck but my camera is at the GF's house. Anyway, as your can see I've got some leaf twisting going on.. kind of looks like some cupping too, but definitely not the cupping I'm used to seeing. The issue started maybe 3 days ago. The plant is about 15 or 16 days from seed.

I was thinking VPD since my average humidity is kind of low (40% average), but I'm looking for some opinions and assistance from you all. Thanks in advance.

Possibly ppm too high? She is young still and I'd like to get this under control so she is healthy when it comes time to top and train.. never had this problem in more than a few years of growing...

I will offer punch and pie for assistance.

hi

great description

tell me exactly how much of each of the 3 part and cal mag your adding per gallon

how big is your reservoir?

could be the result of your drift if it got up real high im betting it grows thru but lets talk nutes just to be safe

It's a WaterFarm by GH so it's a single bucket RDWC system with 2 gallons in the reservoir. I got a feed schedule from GH that is specifically tailored for RDWC. I started with half of the seedling recommendation at the second set of true leaves, and after a week I cleaned and changed the res (mostly to deal with the sediment from the hydroton) and gave it the full seedling dose. Here is the chart. So to recap.. When the second true set of leaves were developing I used half strength of their seedling schedule, and about a week later I increased to full strength for seedlings.

Twist could be a genetic trait of the strain. I have a seedling going also but only a couple days old.

Id have to guess is was caused by swing in pH but if everything is stable now new growth will be fine.

Mr.5280 said:

Id have to guess is was caused by swing in pH but if everything is stable now new growth will be fine.

Click to expand...

The 3rd set of leaves seem to be coming in nicely and I'm not seeing the twisting/cupping yet so I'm hopeful. I'll get a picture of the new growth close up when I get home from work tonight.

And thanks everyone who has chimed in so far.
I'll be interested to hear if @im4satori thinks I've over fed her as I know that could be a factor too.

The growth still seems vigorous and the root development is on point so I'm hoping she is working through it. I just want to get everything dialed in so I'm not fighting this any longer than necessary.

NanoGadget said:

It's a WaterFarm by GH so it's a single bucket RDWC system with 2 gallons in the reservoir. I got a feed schedule from GH that is specifically tailored for RDWC. I started with half of the seedling recommendation at the second set of true leaves, and after a week I cleaned and changed the res (mostly to deal with the sediment from the hydroton) and gave it the full seedling dose. Here is the chart. So to recap.. When the second true set of leaves were developing I used half strength of their seedling schedule, and about a week later I increased to full strength for seedlings.

Click to expand...

although the feed schedule your using is pretty good

the equal parts grow, micro,bloom are ok for veg
it might be a little low on P for early roots but if your ph adjusting with phosphoric acid then youll be ok

id like to show you some numbers of what your formula puts out vs what id recommend
(take into account I don't grow in dwc so your needs might be slightly different this should be very close, I think dwc like extra calcium...is that true?)

im going to use the full strength nutes for each example

but it requires the addition of kool bloom
if you want to save money buy mpk and not kool bloom
https://customhydronutrients.com/haifa-multimkp-c-1_45_61_182.html?zenid=98fb90f38eaeb8efa300337c096ffb94

this is your full strength veg nutes labeled as transition on your feed chart

theres nothing wrong with this formula

if you look close youll notice I added 0.5grams of epsom salt per gallon because your formula leaves you low on Mg

over all the N is on the low side but I wouldn't worry about it
if you show any N def spray lightly with an amino acid (not after 2 weeks into flower)
https://www.kelp4less.com/shop/aminoacids/
1/4 tsp per gallon full dose

this is your bloom

its not bad at all.
you no longer need the Epsom salt

the K is just a little low but I don't see why this would give you trouble

adding some mpk or kool bloom could bring it up

ths adds 0.5mls per gallon of the kool bloom
it brings your K up and sets the 3:2:1 ratio between K:Ca:Mg

personally.. I would run this formula from start of flower to finish without changes

here is the mpk version
itll take the place of the kool bloom and its cheaper

but you have a small res. and it might be hard to mix 0.15grams per gallon

for seedlings I feed about 0.5EC
for clones I start at 0.6

so in the end you nutes are good..you just over fed