revanche's dwc problem

[Revanche21]

Im getting the same problem!

sorry they are out of order:

1st pic: after a few days of spotting
2nd pic: after a week or so of spotting, they dry up and shrivel
3rd pic: early spotting, 1st day or so
4th pic: everything
my setup:

600Watt HPS - 30 inches from plants
DWC
plants are 24 days old, was on a 17/7 for first week and a half and then a 14/10 for the next week and a half, 23 days into it, switched to 12/12.
pH of water: 5.0-5.5
Nutes: 20-7-7
3 Fans to keep everything cool

[Revanche21]

oh yea, and I forgot to mention that this spotting is happening from the bottom up. Starts at the bottom leaves, and is working its way up.

[Revanche21]

I have tried flushing my water in my DWC system, halved the Nutes and raised the light 3 inches above and lowered the water level because of possible overwatering.

I think it might be nute overdose as I might have added too many nutes. What do you think it might have been? maybe we can solve it by looking at both of our commonalities.

And to make matters worse, I woke up to one of my fans sitting on top of my babies! so with slowed growth from whatever this problem was, and the fan breaking some leaves, I don't know what the solution might be.

[Revanche21]

The pH is at 5.5-6.0 somewhere inbetween (strips)
Temp shouldn't be a problem for in the water, don't have a measuring device.
don't have a ppm meter
the nutes I used were a 20-20-20 for orchids, I did 5 tsps in 5 gallons.
the lower leaves get affected first.
they tub is a 5 gallon DWC
from seed
no idea what strain, seem to be indica tho
32 inches from the top of the plant, 600 watt HPS
no humidity or temp gauge

[Revanche21]

well im a newb this is my first plant, mines in soil outside, no nutes added yet.. I think its overwatering because i am watering them everyday..

yea, that might be it, my friend told me my plants are not getting enough oxygen because they look droopy.

[Revanche21]

your last picture is characterisitc of overwatering

yea, inside the DWC tub, the water level was about 3/4 inch above the net pots and now they are about 1 inch below.

hopefully this will correct the problem.

[stinkyattic]

Revanche, you are growing in a COMPLETELY different setup and your problem will be troubleshooted (? uhhh...) very differently. Please start your own thread next time.

[stinkyattic]

Okay.
Your pH is too low.
You're using a completely wrong fertilizer for young cannabis, ESPECIALLY in hydroponics.
You have no way to check temperature.
You don't know your ppm- even worse because your fert is wrong to begin with.

You will either need to basically re-do your setup from scratch, following the basic DWC guidelines outlined in several grow logs (check the 'styles' thread stickied in basic), or consider switching to soil, which is more forgiving if you don't have the correct equipment.

[moneyshotpb]

Revanche, you are growing in a COMPLETELY different setup and your problem will be troubleshooted (? uhhh...) very differently. Please start your own thread next time.

lol I was wondering why these guys seemed to be talking to themselves lol

[Revanche21]

pH is at 5.5-6.0 now
whats wrong with the nutes? 20-7-7? has micronutrients in them.

Your pretty much saying I need every whizz gadget and gizmo to run a decent setup? :\
lame.

[Weedhound]

I think what Stinky is saying is to get and use the right equipment for the right job. Lame is right......good luck growing anything with the stuff you have now.

[justanotherbozo]

relax man, no one is trying to insult you, try and understand that you're not the first newbie to pose these sorts of questions. and i don't think anyone is telling you your stuff is shit, the thing is, it's really obvious you haven't done your research. people don't want to help people too lazy to help themselves. listen to Stinky, she may come across a little gruff but she knows her shit, and she has helped, and continues to help, newbies like you and me. if you can get her to coach her you will learn a thing or two

[stinkyattic]

Orchid food is for orchids, potted in orchid mix.
Hydro pot food is for pot potted in hydro.
They are buffered very differently, and have different relative nutrient levels. You'll be fighting with pH and lockouts if you use the wrong fertilizer.

You don't absolutely NEED an EC meter to grow weed; I've done without on my crappy city water, but if you can't play mad scientist, you gotta play assembly line dude... take the parts that someone else tells you to use and assemble them EXACTLY as intended. Just as you can't put a small block in a Volvo without modifications and a good understanding of the whole system (but OH HOT DAMN is it ever worth it OMG), you can't grow hydro with soil fertilizer unless you have the tools to make the necessary adjustments.

So in your case, match like to like. I strongly recommend the Canna Aqua series as being virtually impossible to fuck up if you follow the instructions on the back of the bottles.

[Revanche21]

its for hydro.

I just want to know whats wrong with the leaves, can no one tell by just looking?

I can't find it in the Growers Bible by george cervantes, looked all over the net, nothing similar to lime spots turning brown eventually and then crisping up.

[justanotherbozo]

its for hydro.

I just want to know whats wrong with the leaves, can no one tell by just looking?

I can't find it in the Growers Bible by george cervantes, looked all over the net, nothing similar to lime spots turning brown eventually and then crisping up.

this isn't the official form from this site but it would help people help you

How can I get a better diagnosis of my plant?
Added by: administrator Last edited by: administrator Viewed: 1,000 times Rated by 30 users: 8.45/10
In order to better help you diagnose your plants problems, please answer the following questions as best you can. Put the answers in a post in the Sick Plants & Problems forum; give as much detail as possible.


Are you growing designer genetics or bagseed?

Are you plants from seed or clone?

How old are your plants total?

Are your plants in flower?

How big are the plants (in height and # of nodes)?

What type of medium are you using and what is its makeup?

What size planter are they in?

Chemical or organic fertilizer?

How frequently do you water and how much do you use?

How frequently do you feed them and how much do you use?

Have you seen any bugs in your garden?

What size light are you using?

How big is the room they are in?

Do you have ventilation?

[Revanche21]

Are you growing designer genetics or bagseed?
Bagseed

Are you plants from seed or clone?
Seed

How old are your plants total?
26 days

Are your plants in flower?
Just started 12/12 a few days ago

How big are the plants (in height and # of nodes)?
About 6 inches tall, 5 nodes

What type of medium are you using and what is its makeup?
DWC with one airstone

What size planter are they in?
5 Gallon

Chemical or organic fertilizer?
Chemical

How frequently do you water and how much do you use?
Sits in water

How frequently do you feed them and how much do you use?
at first 5 tsps of 20-20-20 fert, now after flush, 1 tsp
Also, added H202, Superthrive, 1 tsp of Epsom Salt (now)

Have you seen any bugs in your garden?
no

What size light are you using?
600 Watt HPS 32 inches from tip of plant

How big is the room they are in?
see picture

Do you have ventilation?
Yes, a lot.

Started out with 2x 65 Watt Fluorescent lights (see picture 1)

Started on 17/7 Light cycle for 17 days,
Switched to 14/10 Light cycle for 6 days
Switched to 12/12 Light cycle for 2 days now.

about 3 days ago, I woke up to a fan that had fallen on top of the smallest plant (the one on the left behind the empty one)

pH is now within 5.5-6.0 probably about 5.8 or 5.9 Tested twice with strips to confirm.

[Revanche21]

Bought some 0.25 increment pH strips, these strips show the pH to be at 6.25 whereas the other ones say 6.0 but probably lower.

these new strips are for urine and saliva testing, don't know if that will affect it's ability to read the pH of water...

[stinkyattic]

Why did you add all that Epsom salt?
How much superthrive did you use?
20-20-20 is incorrect for any life stage of cannabis. At 1/5 dose, you have a 4-4-4 fertilizer with too low levels of micronutes. You need a set of cannabis specific ferts. In soil, you have more wiggle room. In hydro, you don't.
Move that fan AWAY from the plants, and point it away from them- it's drying them out. You can see leaf edge curl.
What's with the light cycle switches? Is it possible to maintain dark period in your grow space?
Put them back on 24/0 light. Never flower a sick plant. It will more than likely die before harvest. And 5 nodes is much too small to flower a from-seed plant. You should wait for sexual maturity first. I find that happens around 8 nodes. You'll have to wait and see.

[Revanche21]

epsom salt: 1 tsp in 5 gallons
Superthrive: about 1.5 tsp in 5 gallons
20-20-20: 1 tsp: 1/10th dose 2-2-2 (superthirve should make up the micronutes?)
No fan is directly pointed at the plants, the plants were overwatered and the ridges were curling upward (sign of overhydration?)
It's dark at night?
I don't have time to veg them any longer, this project must be completed before beginning of july to mid july, wish me luck, hope this works out.
5 nodes is too small to flower from a seed plant, however some people do 12/12 from seed?

[stinkyattic]

You've got a wicked N overdose from all that superthrive. The upper LH plant in the first 2 pics confirms that. Soft, dark green, cupped, lush but dull growth. Did you read the instructions on the bottle? It reads, "a drop a gallon". One drop = app. 1/40 mL. Do the conversion from mL to teaspoons to see how badly you overdosed the plants. Where do you see a listing of the micronutrients in SuperThrive? It's not a micro supplement. It's a hormone, and has a crapload of urea in it as well.
Use a micro supplement for micronutirents. GH makes one for hydroponics.

With all that secondary growth, it actually looks like you'd be okay to flower. Looks like more than 5 nodes to me actually. But get them healthy first.

I am not trying to dis your game, but you are reinventing a perfectly functional wheel. Go pick up the GH 3 part and some calmag and run the way that works. If you cannot afford the $20 USD for a pint each of grow, bloom, micro, and the $15 for a test/up/down pH kit, you should consider growing outdoors, where you can use practically any fertilizer you've got kicking around (not the azalea stuff though). Your electricity costs more than that!

[Revanche21]

You've got a wicked N overdose from all that superthrive. The upper LH plant in the first 2 pics confirms that. Soft, dark green, cupped, lush but dull growth. Did you read the instructions on the bottle? It reads, "a drop a gallon". One drop = app. 1/40 mL. Do the conversion from mL to teaspoons to see how badly you overdosed the plants. Where do you see a listing of the micronutrients in SuperThrive? It's not a micro supplement. It's a hormone, and has a crapload of urea in it as well.
Use a micro supplement for micronutirents. GH makes one for hydroponics.

With all that secondary growth, it actually looks like you'd be okay to flower. Looks like more than 5 nodes to me actually. But get them healthy first.

I am not trying to dis your game, but you are reinventing a perfectly functional wheel. Go pick up the GH 3 part and some calmag and run the way that works. If you cannot afford the $20 USD for a pint each of grow, bloom, micro, and the $15 for a test/up/down pH kit, you should consider growing outdoors, where you can use practically any fertilizer you've got kicking around (not the azalea stuff though). Your electricity costs more than that!

I know, and I thank you for your help after the problem first started, I DID order the correct hydroponic ferts that I should have been using, I skimped out and now im paying for it, lesson learned :\

node is set of leaves? theres 5 major sets
the directions for superthrive say 1/4tsp per gallon I figured 1.5 tsp was only 1/4th over :\ ill do a flush again lol

*edit*

actually going to drain a gallon and add regular water to dilute the solution and wait until the correct nutrients show up

[justanotherbozo]

i was told to use only a drop of Superthrive per gallon or i would burn my plants, very strong shit as i understand it
anyway, toke on

bozo,
peace, love, dope

[stinkyattic]

Huh. My bottle of ST says one drop. I is confused. Be careful with that stuff- it's IMHO best reserved for soil growers to use as a transplanting solution. It is primarily meant to reduce the stress of moving a root ball into a new home.
But since you are going into flower you need to completely stop using it anyway. It actually hurts bud-set with all that N and hormones. I'd change the res completely to remove all ST from the system. I'm glad you are getting some easier fertilizer to use!

Yup, a node is the bump on the stem where each set of leaves comes out.

[Revanche21]

Huh. My bottle of ST says one drop. I is confused. Be careful with that stuff- it's IMHO best reserved for soil growers to use as a transplanting solution. It is primarily meant to reduce the stress of moving a root ball into a new home.
But since you are going into flower you need to completely stop using it anyway. It actually hurts bud-set with all that N and hormones. I'd change the res completely to remove all ST from the system. I'm glad you are getting some easier fertilizer to use!

Yup, a node is the bump on the stem where each set of leaves comes out.

Thank you for all your help, maybe if I don't get all lazy Ill set up a grow journal for everything that has happened so far, so others can not make the same mistake haha wish me luck!

[stinkyattic]

lol good luck, you're not the first person to overdose on a Thrive product, and no doubt you won't be the last.

[Weedhound]

I petrified one of my brand new seedllings with too much ST .....hard as a rock.....used the the little tap root as a toothpick and almost took my eye out with it......:wtf:

[8182KSKUSH]

Good luck

[Revanche21]

Grower friend says pH needs to be 5.5

Text (http://cannabis.com/growing/ph-What_Ranges_should_I_maintain_for_my_hydroponic_nu trients_pH_TDS_EC_and_temperature.html) says 5.2 is optimal

Stinky says 5.5 is way too low

other growers recommend around 6.0

Currently the setup is at 6.0

What to do?

[abuse]

I would keep on the safe side and stick with something around 6, whether that be slightly more acidic or less, by like .2 or so.

[Help_Needed]

I would keep on the safe side and stick with something around 6, whether that be slightly more acidic or less, by like .2 or so.

Dude! Look at the date before you resurrect an old post like this. OP posted this back in MAY!! Which means the grow is finished and harvested, or the plants died. Either way there's no point in replying this late.