Girls a little sickly

[Mellowbuzz]

Hello everyone, I'm new to the forum and it's my first post here guys.
I know their is a bunch of experience and knowledge here, and hoping somebody can help me out.
I have 4 plants (2 Breeders Boutique Plemon & 2 BB Sour Cherry)
They are 4 weeks old, and were topped 2wks ago. All in all they seem to be doing well.
Problem being, the yellow/brown spots on some leaves of two of the plants. 1 Plemon and 1 SC, so it's not just 1 strain. The lower leaves in the Pics came about week ago, day or two after feed. Now there is more upper leaves affected today after feeding yesterday. makes you think nute burn but it looks to me more like a calcium problem or deficiency.
I don't know if its connected, but it seems the new growth is a lighter green in color, almost leaning towards yellow compared to the rest of the plant.
From everything I've read and researched so far, to me it looks more like a possible Calcium def./lockout than over feeding. That's my first guess anyways. What do you guys think?

4 x 4 tent
400 Watt Vero29 V7 set @200w now
DTW sraight canna coco in 3 gal. smart pots

3ml Cal/Mag (was using 2ml up to last feed)
8ml canna riz
10ml canna a&b
PH down to 5.6
76 to 80 degrees

350 ppm RO water + nutes, etc. = 1030ppm

I exhaust the tent with inline fan running at a very low speed with a passive intake. Trying to keep a some what higher 65 to 70% RH compared to 55 to 59% RH outside tent.

 

[maimunji]

Pots is too big for the size of the plants. Also ppm is too hot, you burn them. What is this Ro water 350 ppm? How much ppm is before filtration? Flush with 650-700 ppm and stay there. Good luck.

 

[mowood3479]

How close is the light? Looks like mayb it's too close... I could be wrong but that's my guess

 

[fredDRO.MoBB]

5.6 is to low for soil

 

[fredDRO.MoBB]

oops never mind sorry your in coco

 

[fredDRO.MoBB]

the light green new growth happened to me. it was from watering with cold water. soon as I watered with room temp water it fixed up. when the soil is cold the plants can't take up its nutrients and the growth will also get stunned. an other reason for lime green new growth is when the temperature from day and night is 20 degrees difference

 

[Mellowbuzz]

Thanks for the input guys.

maimunji. I did get lazy on the jump from Dixie cups to the 3 gal. and think it did effect them. Next time they will go from cup to 1 gal then 3 gal.
I have very hard water and after my softner and RO it still ppms around 350. I'm not home now and can't remember my hard water ppm before RO but it is something north of 600ppm. Sort of screws you when you start out with that high of ppm before you even add nutes. But I will lower ppm. thanks.

mowood3479. Keeping light between recommended 12 to 18 inches but closer to the 12 side.

fredDRO.MoBB. Maybe that is the problem with the light colored new growth. maybe I will bring the water in the tent and let it warm up more. It has been just sitting in my 59 degree basement. Temperature swings are not happening like you mentioned though. Thanks for the tips

So I'm guessing I may have a to high of ppm feeding causing most of my trouble.
I wonder if I even need to add cal mag since I'm still at 350 ppm with my high RO water?

 

[maimunji]

Try to up light a little. Close to 18 ich. Also let them drink all moisture from pots before watering again. Looks like your water isn't perfect for growing. Do you have success before with this water? What about house plants drinking this? How they look? I dont think you will need cal mag with 350 ppm water but after filtration who know what lefts there. Plants looks almoust like overwatering and hungry at same time which is very hard with that high ppm most of the coco growers here rarely goes over 600-700 ppm in full flowering. What is your watering schedule do you let them to dry before watering again?

 

[Mellowbuzz]

1st indoor grow, so I'm just trying to get a feel for it. It's well water. I knew it was really hard water, that's why I bought RO system years ago; for cooking,drinking, etc. I just changed the 3 filters too, right before started grow, so it's not neglected. I never really thought about it much for plant growth untill now. But your right, house plants never do real well. I'll have to think of a way to try and improve that situation, besides carrying water in.
Since they went in the 3 gallon pots (Jan 21) I have only watered 3 times. So yes, been trying to wait till they loose half their weight before hitting them. That's all they have needed. So you think let them dry out more, instead of flushing down to a 650-700ppm right away?
I will also move the light up higher to 18 inches.

 

[SamsonsRiddle]

how can ro water be at 350 ppm? also, what scale are you on? 1000 on the .5 scale is not the same as 1000 on the .7 scale. learn how to talk in ec to get better answers.

she does look a little overfed by the slight clawing, but you can't tell her color very well in the last pics since you have your led's on. turn them off and take a couple full plant pics.

 

[Mellowbuzz]

It's a TDS & EC by health wiser from a recent amazon purchase. Don't know how accurate it is. Just checked my water right now. Stray From the Path it is 0447 PPM 0881 EC. RO water reads 0273 PPM. 0544EC. Distilled reads 0000. And it does vary from day to day somewhat.
So are you saying it is junk?

 

[Mellowbuzz]

Should have mentioned it is a Apec water purification RO system. It's probably not the best system, but it's not that old.

 

[maimunji]

How much ppm is your tap water? Do you have tap there? Is this different strains?
Im not sure how flush will help because you will flush with same water and if there is something wrong it doesn't help. Try with one plant watering to run off with weak solution 600 ppm and test what run off say ph and ppm. Spray one plant with epsom salt spray under the leaves also. Wait more people to give you their advice im sure someone will know what happening.

 

[Mellowbuzz]

some different pics.

 

[maimunji]

They looking good. Let em grow and dont worry.

 

[Chillin12]

I thought plants in Coco we're supposed to grow bigger then plants in soil . This is my first grow and my plants are only 4 days older than yours. Mine are filling a five gallon fabric pot that I planted the seed in. 18 inches tall 17 inches wide with 13 tops each. I thought they were autos so I planted in the final pot and never topped them. Is it because I never topped them that they are so much bigger?

 

[Chillin12]

Hold on a second. You say that you're running at 200w with a maximum of 400 watts? I don't understand the reasoning behind that. I've been running my1000w MH at 100% 24/24 or 20/4 since my seedlings third set of leaves.

 

[Mellowbuzz]

Post #11 should of read more like this.

Tap water 0447 PPM
0881 EC

RO Water 0273 PPM
0544 EC

Distilled 0000 PPM
water 0000 EC

Damn phone and auto correct.



maimunji, thanks for the advice and kind words. As of now, I'm going to cut way back on my next feeding, see what happens.


Chillin12, your babies are looking good. Definitely have the height advantage on my girls.
Don't have the answers to your questions, but obviously topping affected the height. Lots of other variables such as strain, type of lighting, 24/24 vs. 18/6, water, etc.
As far as the light being run at 50%, thats supposedly the "sweet spot" where COB LED's are the most efficient. At least that's what I've been told. I am sure lots of people here could explain it better than I could.
It is a starting point for me anyways. I have it set now at 200 watts using a Kill a Watt meter. My plan was to start increasing watts as the plants age.
It is called a 400 watt, but according to my Kill a Watt meter it peaks at 379. When you crank it up, visually their is not that much difference, from say 250 to 379. But that might just be me, being old and all.

 

[Chillin12]

But that might just be me, being old and all.

I don't know how old you are but I'm barely over 50 and learning this stuff sometimes gives me a headache. Don't get me wrong, I'm enjoying myself thoroughly. I just have difficulty understanding all you need to know about nutrients, light, humidity, air flow, CO2 etc etc etc.

 

[Mellowbuzz]

I hear you Chillin. Graduated in 1979. So I may have you beat a couple years. Getting into the game late is rather challenging but like you said very enjoyable. I have been doing a lot of reading and research for some time now. Lot of contradictory information out there. I am still not sure if I am under feeding or overfeeding. This last week I have been changing water supply, adjusting light height and wattage, nute levels, and fresh air intake. They seem to being doing ok, but I think they should be doing better. But hey, I am having fun and learning every day.