Burning or Killing Seedlings

I'm very adept at killing seedlings and am about to throw in the towel. I either burn them or starve them to death. I've only been able to grow two crops and that was using Espoma Organic soil (way too expensive and full of fungus gnats). Those crops showed many deficiencies and barely made it to harvest. Here are my total failure attempts: At three weeks from germination, I tried potting up to one-gallon pots with Fox Farm Ocean Forest soil (burned them to death). Next attempt mixing FFOF with Promix All Purpose mix and perlite (burned them). Next attempt using Promix and perlite in top half of pot and using Promix, FFOF and perlite in bottom half of pot (burned them). Next attempt using Promix All Purpose mix and perlite only. After 4 weeks in those pots, the lower leaves were starting to yellow so I used 1/4 strength Big Bloom (burned them). I tossed the failed attempts when they were about 4-6 weeks into veg.


My latest attempt was supposed to be keeping it simple and taking the guesswork out and ensuring not burning the plants: I used 60% Promix All Purpose mix, 20% perlite and 20% EWC. To that, I added 1 T. of Espoma Dolomite Lime and 1T. Happy Frog All Purpose dry fertilizer. I flushed soil and waited a few days to add my two-week old seedlings. That is supposed to provide enough fertilizer for at least a month until I pot up into 3-gallon pots and use Happy Frog Flowering dry fertilizer. I'm using RO water and Ph it to 6.3 to 6.5. My runoff water has Ph of 6.7. I have the plants in an Earth Cab Max grow cabinet made by Cabinet Grow. The LED lights are kept 10-12 inches from seedlings. The humidity is tough to regulate here in cold months even though I have a cool mist humidifier blowing at cabinet. I try to keep humidity between 40-45%. Temps are low to mid 70s at night and 80-85 during day. When temp is 85, I open cabinet door and blow a fan in there to cool it down.


See the sad pics attached. Aren't these major deficiencies or maybe Ph problems that have locked out nutrients? Don't understand how it could be nute burn. This soilless mix is supposed to work. What am I doing wrong? Is my Ph input too high? I didn't think a Ph runoff of 6.7 was bad but what the heck do I know. I've been growing my own perennials, annuals and veggies, including tomatoes, from seed for 20 years now. But I'm a total failure at growing pot and it's really frustrating the heck out of me. HELP!!YellowPlants.jpg
 
I think its as simple as you are over watering...whats your watering cycle?
It's on average every six to seven days. I wait until I stick finger in soil and it's dry to first knuckle level. I water each 1-gallon pot with about 4 to 6 cups of water, just until I have enough runoff to check runoff PH.
 

rkymtnman

Well-Known Member
ever thought about trying hydro?

one thing i noticed is 1/4 strength is way too strong. try like 10% nutes starting off.

you said you were using RO water? you don't need to feed every watering too. try some waterings with just cal/mg instead of nutes. and then try just plain old RO for waterings. kinda mix it up a bit.
 
ever thought about trying hydro?

one thing i noticed is 1/4 strength is way too strong. try like 10% nutes starting off.

you said you were using RO water? you don't need to feed every watering too. try some waterings with just cal/mg instead of nutes. and then try just plain old RO for waterings. kinda mix it up a bit.
For this current grow that I included pictures of, I only used 1 T. of Happy Frog All Purpose fertilizer per one-gallon container. I only use RO water with NO added fertilizer in the water. The dry fertilizer in soil mix is supposed to last for at least a month without adding any additional fertilizer when watering. The seedlings have been in this soil with no added fertilizer for 3 weeks now. WTH?
 

Diabolical666

Well-Known Member
It's on average every six to seven days. I wait until I stick finger in soil and it's dry to first knuckle level. I water each 1-gallon pot with about 4 to 6 cups of water, just until I have enough runoff to check runoff PH.
yep thats it dude. your should give them just enough water for them to dry out in 2-3 days...so essentially you are giving them 2x's the amount of water they need. Over watering will suffocate the roots and lock out nutrients. The lower leaves will take the 1st part of the brunt of this and cuase yellowing and then onto crispy leaves.
When you do this watering schedule in this way , it incorporates perfectly with the feeding schedule for fox farms ( I myself are a FF gal). FF lacks cal/mag so get some cali magick or equevelent..epsom salt didnt work for me just wasnt a fast enough comeback. le tthese plants dry out 85% and give them half a dose per gallon of water of your Big Bloom. Get some cal/mag asap too. What nutrients of FF do you have on hand?
So get rid of those dead leaves and let her dry out, give her a half dose of food as I recommmended. If you mix that dose into a gallon jug, and most likely you will not use all that mixture bc you are cutting back your watering now..save it for 2-3 days till they dry out and give em the rest. Your soil has depleted its nutes for the most part at 3 wks..
 

rkymtnman

Well-Known Member
hey 666, don't you think it looks like calcium defic in most of those pics? i'm not a dirt guy for weed. i like the almost instant feedback of hydro. i grow some mean tomatoes and i swear by age old organics fish and seaweed formula. not sure if the NPK is good for weed but it kills it for veggies
 

Thefarmer12

Well-Known Member
#1 thing that kills seedling is overwatering. Water once or twice a week for atleast the first couple weeks. Secondly go easier on the nutes than you think would be necessary. If your soil has enough nutes don't add more until it shows deficiency then add 1/4 the manufacturers recommendation and work up. Keep it simple. Don't over care for them.

I've done this 8 years now and I still tend to want to over water my seedlings. Keep yourself in check. Good luck,
 

Diabolical666

Well-Known Member
hey 666, don't you think it looks like calcium defic in most of those pics? i'm not a dirt guy for weed. i like the almost instant feedback of hydro. i grow some mean tomatoes and i swear by age old organics fish and seaweed formula. not sure if the NPK is good for weed but it kills it for veggies
naa when its in dirt it acts like a drout plant almost ...you give it too much water and it acts stupid and can cause all kinds of deficiencies and dead leaves. When it wilts from lack of water it springs back with no damage. OP if you are checking these plants on a daily, no need to give em all kinds of water.
 

tropicalcannabispatient

Well-Known Member
I'm very adept at killing seedlings and am about to throw in the towel. I either burn them or starve them to death. I've only been able to grow two crops and that was using Espoma Organic soil (way too expensive and full of fungus gnats). Those crops showed many deficiencies and barely made it to harvest. Here are my total failure attempts: At three weeks from germination, I tried potting up to one-gallon pots with Fox Farm Ocean Forest soil (burned them to death). Next attempt mixing FFOF with Promix All Purpose mix and perlite (burned them). Next attempt using Promix and perlite in top half of pot and using Promix, FFOF and perlite in bottom half of pot (burned them). Next attempt using Promix All Purpose mix and perlite only. After 4 weeks in those pots, the lower leaves were starting to yellow so I used 1/4 strength Big Bloom (burned them). I tossed the failed attempts when they were about 4-6 weeks into veg.


My latest attempt was supposed to be keeping it simple and taking the guesswork out and ensuring not burning the plants: I used 60% Promix All Purpose mix, 20% perlite and 20% EWC. To that, I added 1 T. of Espoma Dolomite Lime and 1T. Happy Frog All Purpose dry fertilizer. I flushed soil and waited a few days to add my two-week old seedlings. That is supposed to provide enough fertilizer for at least a month until I pot up into 3-gallon pots and use Happy Frog Flowering dry fertilizer. I'm using RO water and Ph it to 6.3 to 6.5. My runoff water has Ph of 6.7. I have the plants in an Earth Cab Max grow cabinet made by Cabinet Grow. The LED lights are kept 10-12 inches from seedlings. The humidity is tough to regulate here in cold months even though I have a cool mist humidifier blowing at cabinet. I try to keep humidity between 40-45%. Temps are low to mid 70s at night and 80-85 during day. When temp is 85, I open cabinet door and blow a fan in there to cool it down.


See the sad pics attached. Aren't these major deficiencies or maybe Ph problems that have locked out nutrients? Don't understand how it could be nute burn. This soilless mix is supposed to work. What am I doing wrong? Is my Ph input too high? I didn't think a Ph runoff of 6.7 was bad but what the heck do I know. I've been growing my own perennials, annuals and veggies, including tomatoes, from seed for 20 years now. But I'm a total failure at growing pot and it's really frustrating the heck out of me. HELP!!View attachment 3545031
u need to start. Keeping things more simple since u having all this problems, try this. Go to walmart and get any small bag of starting potting mix, also buy a small bag of perlite, mix the seed starting potting soil with the perlite, place your new mixed soil in a small party cup, germinate ur seed and after she germinate, with your finger make a hole in the middle around 1. Inch deep, place your seed, and cover with soil lightly dont compress the soil too much, water a little until soil get wet but not too damp, oh remember to make 4 draining holes at bottom of party cup before watering, after that just place her under a couple of cfls of 23 watts daylight spectrum of 6500k around 2-3 inches from the top of the party cup, after that just leave the lights on 24 hours a day, then just keep the soil moist but not damp wet, water a little with room temperature water every time soil dries up but dont wait until bone dry, repeat this watering schedule and keep the lights 24 hours on, and as the plant grows keep the lights always at 2-3 inches away from tops of seedlings, after 2 or 3 weeks should be seeing roots coming out through drain holes, at this point u want to transplant into a bigger pot, get yourself a 5 gallon pot make 4 drain holes in the bottom and a bunch of smaller ones, get yourself a large bag of seed starting potting mix and mixed with a large bag of perlite, also get some epson salt also at walmart, and also get some dolomite lime, put 5 scoops of epson salt and 5 scoops of dolomite lime into your seed starting potting mix mixed with the perlite, mix all together really well and after that saturate your new soil in the 5 gallon pot, then let it drain really good and open a hole in the middle. The size of the party cup, turn carefully your party cup upside down and place the seedling with the soil in the hole that you made in the 5gal pot, after that just fill up the sides of the hole u made and top dress nicely press a little around the top of soil and around the stem, softly dont compact it to hard and after that, get urself some vegetation nutrient of a npk ratio of 30\10\10 r close to that. Diluate at the recommended dose of 1\4 strength and water until u get some run off, and vuala. After that u should. Be good like for 14 days or 21 days after that 21 days water slightly. Every 7 days or when u see soil getting to dry at this point u want to have around 6x 23 watts cfls daylight spectrum of 6500k around 2-3 inches of the tops of the plant. let me know if this works for you. U should not get into any problems if u do it the exact way i have told you!! it works for me every time. So it should work for u. I dont use no magic. Lol. Good luck!!!
 

Alexander Supertramp

Well-Known Member
naa when its in dirt it acts like a drout plant almost ...you give it too much water and it acts stupid and can cause all kinds of deficiencies and dead leaves. When it wilts from lack of water it springs back with no damage. OP if you are checking these plants on a daily, no need to give em all kinds of water.
Its not over watering. Reread his post on his watering habits.
 

rkymtnman

Well-Known Member
naa when its in dirt it acts like a drout plant almost ...you give it too much water and it acts stupid and can cause all kinds of deficiencies and dead leaves. When it wilts from lack of water it springs back with no damage. OP if you are checking these plants on a daily, no need to give em all kinds of water.
thanks! will keep that in mind. i'd like to try an auto next year outside in the greenhouse. just see how it does.
 

Bbcchance

Well-Known Member
What size are your leds? I run 2 300w blackstars and I burnt the craps out of mine when they were little, I also was about 12" away from tops, I assumed that because I didn't feel heat they were fine, but I assumed wrong(lol) once I moved em back to 20" things perked right up and got greener, I preface this with I am a compleat nube on my first real grow now(yes they lived), so I am probably wrong, just telling you what my issue was:cool:
 
Thanks so much everyone. I have wondered about overwatering. That's got to be it. Sounds like 666 and farmer12 are suggesting maybe 2 cups of water per one-gallon pot at most. The lower leaves yellow and start to brown and it's just moving up the plants. I'll back off the amount of water I give them. Think I'll toss these and just start over and TRY to use my growing skills better.
 

Diabolical666

Well-Known Member
Thanks so much everyone. I have wondered about overwatering. That's got to be it. Sounds like 666 and farmer12 are suggesting maybe 2 cups of water per one-gallon pot at most. The lower leaves yellow and start to brown and it's just moving up the plants. I'll back off the amount of water I give them. Think I'll toss these and just start over and TRY to use my growing skills better.
dude noway...dont chunk em..this is a simple fix. they will look good after all the crap is taken off...all the energy will direct to the tops anyways. they look good other then the crispy..just keep rocking them.
 
What size are your leds? I run 2 300w blackstars and I burnt the craps out of mine when they were little, I also was about 12" away from tops, I assumed that because I didn't feel heat they were fine, but I assumed wrong(lol) once I moved em back to 20" things perked right up and got greener, I preface this with I am a compleat nube on my first real grow now(yes they lived), so I am probably wrong, just telling you what my issue was:cool:
LEDS are 720w and Cabinet Grow told me to start seedlings at 12 inches from lights. Haven't noticed any cupping of top leaves but wouldn't hurt to back the lights off a bit until I see some stretching.
 
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