sanousie

1. Are you growing from seed or clones? seed
2. How old are your plants? 21 - 23 days
3. How tall are your plants? 3 - 6 inches
4. What type of hydro system are you using? Eb and flow, But some roots are exposed.
5. What brand/type of nutrients are you using? Canna Vega
6. Do you have a PPM/EC meter? Yes
7. What is the PPM/EC of your tap water? 90 or so
8. What is the PPM/EC of your nutrient solution? 400
9. What is the temperature of your nutrient solution? 21 - 23 Degrees
10. Does your PPM/EC show a rise or fall when you do your daily PPM check? Rise
11. Does your pH show a rise or fall when you do your daily check? Rise
12. What kind of lights do you use and how many watts combined? (HPS, MH, fluorescent, halogen, incandescent "plant lights") HPS 400 watt
13. How close are your lights to the plants? about 55 cms
14. What size is your grow space in square feet? 3foot wide, 1.5 foot depth, 6 foot high
15. What is the temperature and humidity in your grow space? 79 - 83 F, 45 - 50 percent
16. Have you noticed any insect activity in your grow space? Nope
17. How much experience do you have growing? First grow

I have done about 10000 searches i have read so much threads, Well yesterday i did a flush for like 2 hours of constant running water. Then did a res change with new nutes at 480ppm including water, But now im paranoid i read that you need to flush the plants for atleast 48hours? Is this with constant water flow? or at normal watering intervals like every 4 hours?

Im sure its nute burn cause my first nute solution the plants thrived magnificantly and then they turned dark green and then the lower bottom leaves started burning up, some burnt more then others, I think it was my first table that i made, it was holding some water in the middle and i think the water was evaporating and making hte nute solution alot more concentrated, But at one stage i did not have a PPM meter that was like 1 week into veg, as soon as i recieved it in the mail i did a check and my ppm was at 800.

Other plants have yellow leaves at the bottom and some leaves a drooping? is that nute defiency? cause i read when the palnt yellows from the bottom its nute defiency

Anyway im a n00bie sorry for the trouble, here are some pics

Attached Thumbnails

     

   

SomeJaneInRI

Not enough nutes ... I think? Yellowing from the bottom is a def, yellow from the top is a burn. Or is that only for soil? This is hydro ...

can someone confirm?

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TsouLee

Yeah, i think ill agree with SomeJaneInRI, since its from the bottom. + the leaves look like they are using their stored nutes...

But wait for another opinion just in case!

PS: exposed roots in light? That cant be good (if thats what u mean by "exposed roots").

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SomeJaneInRI

Pictures 3 and 4 looks like a deferent diffency than the others. The yellowing bottom leaves is jsut the plant asking for some N.

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Outdoor grower, Recently moved inside

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Everything that is above this message is false and fake. I don't understand any of it.

Lollie

I second and third the above.

If you want to - check out my garden, I have algae on the exposed roots, which is not good! Cover those roots-and that's my opinion!

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Conversions: 70 ppm to 50 ppm = 1 CF = 0.1 EC and 5 ml = 5 cc = 1 teaspoon

sanousie

Yeah i did that yesterday after reading multiple threads on roots, But i thought leaving them exposed would give them more oxygen, but it tends to dry them up really quick.

I have added some nutes after flushing the plants out for about 12 hours with normal watering intervals of every 5 - 6 hours. Which was yesterday.

Today i checked my TDS and it has fallen by 50ppm and the ph went from 5.6 to 6.4, I think thats normal isnt it? plants are taking up the nutes and i have read everywhere and all the journals the PH always rises when the plants are ok? i think correct me if im wrong.

I also forgot to mention some days my temp reached about 89 - 92 f and the RH dropped to like 25 - 35 percent, and after those days the plants growht started slowing down and the leaves started canoeing and curving upwards just abit, but now all the new growht is nice and green and looks healthy, they seem to be getting on track.

I have lowered my temp now and increased my RH from 40percent to 50 - 55 percent, i read that when the temps go above 80f and rh below 40 the plants start to transpire and take up mroe nutes and water so i had my ppm very low so it wouldnt burn the plants. Would it be a good idea to increase my concentration abit now that i have lowered my temps and increased my RH?

Also does yellowing from the top of the plant mean its nute burn? Like you mean the new growth is yellow? I have read so much on nute burn and i forgot its so confusing, i thought when the leaves yellow from the middle to the outside that was nute burn.

Thankyou all for your replies.

`Spanky

Hydro cheat sheet:
Ec/PPM goes up, PH goes down=plants require less nutes.
Ec/PPM goes down, PH goes up=Plants require more nutes
Ec/PPM stable, PH goes up=Equilibrium=Good thang.
-OldPhart
This may help you out.

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sanousie

OMG thankyou so much that has helped me alot, and i think its not nute burn its nute defiency cause everytime i have checked my nutes the last couple of days, PH goes up and Nute concentration goes down.

Will add more nutes i think i will increase the ppm to around 600 - 700 from 400, that shouldnt be to much of a jump?

Lollie

The story goes---if the ppm drop by 50 overnight, add 100 the following day. If it goes down 200, add 400 the following day.

Most gardener's would probably say that is too much of a jump, from 400 to 600-700. I say go for it! I believe they need around 1000 shortly after they have decent roots. And that's my opinion.

All the best,
Lollie

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Conversions: 70 ppm to 50 ppm = 1 CF = 0.1 EC and 5 ml = 5 cc = 1 teaspoon

sanousie

Thankyou all for the replies, i really appreciate the help.

Well its been about 12 hours since i increased the PPM from 350 to 550 and the plants after 2 waterings look alot healthier leaves seem to be straight they aint drooping as much, I will check ppm again tomorrow to see if it drops and if thats teh case i shall increase again.

Thankyou again to all.

EDIT: Some of the brown spots are moving up the plant, but these brown spots were discolourations on the plants bottom fan leaves like were the spots are it used be a very light green/yellow colour? is that the previous damage from before just finishing its self off? Cause the new growth looks nice and green and seem n0rmal to me.