Sick DD Seedling...happened overnight..any help? - Serious Seeds - International Cannagraphic Magazine Forums

donatello22 · 02-27-2008, 09:47 PM

Hi everyone:

I have done quite an extensive search to diagnose this problem quickly but I still can't find any exact examples of whatever this is because most are of older plants. This is what I got from a seed that I am testing before I go all out...everything was going fine but today when I woke up the plants two most lower leaves were twisted up and had large brown spots throughout the leaves. The newer growth seems to be fine thus far. My initial suspicion is heat stress but I would like other opinions.

Sorry for the pic being out of focus...had to borrow a crappy cam because mine is out of town...and this was the best shot of them all..

thanks in advance for the help!

No nutes used yet....this plant is going to be moved into a hydro setup within days...but since it is in soil atm I will use that form...

What STRAIN are you growing? Double Dutch

What was the establishing technique? (seed or clone?) Seed

What is the age of your plants? 1 week

How Tall are the plants? 2"
What PHASE (seedling, vegetative or flower) are the plants in? VEG

What Technique are you using? (SOG, SCROG etc) N/A

What size pots are you using? (Include how many subjects to pot) Similar to small beer cup

What substrate/medium are you using? What brand of soil mixture are you using?(percentage of perlite, vermiculite...etc?) Potting Soil (50%) / Perlite 50% Few hydroton balls at bottom.

What Nutrient's are you using?How much of each with how much water? How Often? *Knowing the brand is very helpful* None

What is the TDS/EC/PPM of your nutrients used?

What is the pH of the "RUN-OFF"? 6.0

What method of pH test was administered? Using Strips? pH pen? Strips

How often are you watering? every 3 days if needed

When was your last feeding and how often are you feeding? N/A

What size bulb are you using? 2x42W CFL in cooled hood (adding more when the remaining 3 germ.)

What is the distance to the canopy? 3-4"

What is your RH Factor? (Relative Humidity) N/A

What is the canopy temperature? ~29C

What is the Day/Night Temp? (Include fluctuation range)

What is the current Air Flow? (cfm etc.) Adding circulation fan soon...temporarily in my closet. 120mm Fan cooling hood

Is the fan blowing directly at plants? No

Is the grow substrate constantly wet or moist? Moist

Is your water HARD or SOFT? Not sure

What water are you using? Reverse Osmosis (RO)? Tap? Bottled? Well water? Distilled? Mineral Water? Distilled

Has plant been recently pruned, cloned or pinched? No

Have any pest chemicals been used? If so what and when? No

Are plant's infected with pest's? No

02-27-2008, 10:02 PM

Hi D! Ar you using nutes in you water? Hopefully not-- also, do you know the ph of your water before giving it to your seedlings?

The burn your seedlings look to be a ph issue but dont know for sure until getting some more info.

You said in your post you thought it could be from heat stress. Yes, the temps seem high, so I would lower the temps.

Moreover, I would make sure you have plenty of drainage holes in the bottom of the cups!

Peace, Mosca

Gerrit · 02-28-2008, 02:32 PM

Hello Donatello,

I would drop the use of distilled water and start feeding with a mild nutrient solution.
I'm pretty sure it will pick up a few days after that.

Gerrit

donatello22 · 02-28-2008, 02:36 PM

Thanks guys...

Mosca: No nutes yet...and pH before I water is about 5.8

Gerrit: if I am planning on moving it into a hydro ebb n flow is now the time....or should I feed and wait a few more days?

02-27-2008, 09:47 PM	#1
donatello22 Member Join Date: Jan 2008 Posts: 101	Sick DD Seedling...happened overnight..any help? Hi everyone: I have done quite an extensive search to diagnose this problem quickly but I still can't find any exact examples of whatever this is because most are of older plants. This is what I got from a seed that I am testing before I go all out...everything was going fine but today when I woke up the plants two most lower leaves were twisted up and had large brown spots throughout the leaves. The newer growth seems to be fine thus far. My initial suspicion is heat stress but I would like other opinions. Sorry for the pic being out of focus...had to borrow a crappy cam because mine is out of town...and this was the best shot of them all.. thanks in advance for the help! No nutes used yet....this plant is going to be moved into a hydro setup within days...but since it is in soil atm I will use that form... What STRAIN are you growing? Double Dutch What was the establishing technique? (seed or clone?) Seed What is the age of your plants? 1 week How Tall are the plants? 2" What PHASE (seedling, vegetative or flower) are the plants in? VEG What Technique are you using? (SOG, SCROG etc) N/A What size pots are you using? (Include how many subjects to pot) Similar to small beer cup What substrate/medium are you using? What brand of soil mixture are you using?(percentage of perlite, vermiculite...etc?) Potting Soil (50%) / Perlite 50% Few hydroton balls at bottom. What Nutrient's are you using?How much of each with how much water? How Often? Knowing the brand is very helpful None What is the TDS/EC/PPM of your nutrients used? What is the pH of the "RUN-OFF"? 6.0 What method of pH test was administered? Using Strips? pH pen? Strips How often are you watering? every 3 days if needed When was your last feeding and how often are you feeding? N/A What size bulb are you using? 2x42W CFL in cooled hood (adding more when the remaining 3 germ.) What is the distance to the canopy? 3-4" What is your RH Factor? (Relative Humidity) N/A What is the canopy temperature? ~29C What is the Day/Night Temp? (Include fluctuation range) What is the current Air Flow? (cfm etc.) Adding circulation fan soon...temporarily in my closet. 120mm Fan cooling hood Is the fan blowing directly at plants? No Is the grow substrate constantly wet or moist? Moist Is your water HARD or SOFT? Not sure What water are you using? Reverse Osmosis (RO)? Tap? Bottled? Well water? Distilled? Mineral Water? Distilled Has plant been recently pruned, cloned or pinched? No Have any pest chemicals been used? If so what and when? No Are plant's infected with pest's? No
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02-27-2008, 10:02 PM	#2
mosca negra Guest Posts: n/a	Hi D! Ar you using nutes in you water? Hopefully not-- also, do you know the ph of your water before giving it to your seedlings? The burn your seedlings look to be a ph issue but dont know for sure until getting some more info. You said in your post you thought it could be from heat stress. Yes, the temps seem high, so I would lower the temps. Moreover, I would make sure you have plenty of drainage holes in the bottom of the cups! Peace, Mosca
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02-28-2008, 02:32 PM	#3
Gerrit Member Join Date: Dec 2005 Posts: 236	Hello Donatello, I would drop the use of distilled water and start feeding with a mild nutrient solution. I'm pretty sure it will pick up a few days after that. Gerrit
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02-28-2008, 02:36 PM	#4
donatello22 Member Join Date: Jan 2008 Posts: 101	Thanks guys... Mosca: No nutes yet...and pH before I water is about 5.8 Gerrit: if I am planning on moving it into a hydro ebb n flow is now the time....or should I feed and wait a few more days?
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