help :(1 week old, light green in color, yellow tips -pro-mix

Hi all,

I planted them on the 16th, they popped up on the 19th.

Soil is pro-mix hp, 2tbl's dolomite lime per gal

3 cups ewc per 4 gal pot

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I fed straight tap water that had been bubbling, for the first few days, then i mixed up some myco-madness at 5ml per gal, and added about 600ml per pot. I didn't adjust the ph of the myco, or the tap water i had used, not sure if that has something to do with it.. my tap water is fairly high with a ph of about 8.3. After the myco I noticed slight yellowing, and I thought it might of been from the high ph, so I mixed up some plain ph 6.0 water, and added a few liters to each of the pots.

They had only had at most 1liter of water that was the high ph, over the course of the first 3 days.. The pots were barely wet for the top few inches, just around the seedlings from the light waterings. Then they got a decent amount of the 6.0 water, I would say about 4liters worth.I dont think they are over watered, the pots are quite light for their size.

Here are the pics, I am wondering if they need some nutes this soon, or is this from the high ph water?

Also here is a link to the journal I have been keeping.
https://www.icmag.com/modules/Journal/viewentry.php?journalid=1538

for some reason the first 5 pics didn't link to the fullsize ones

Could this be from off gasing of the grow tent??? It's a hydro home

I'll jump in.

Trying to diagnose a specific nutrient issue on a plant this young in a pot that big can be anything but a precise science, certainly over da Net.

So, instead of just rambling off different reasons why a plant that young can be showing yellowing leaves, you okay with me talking about the specifics of your grow that even if they aren't contributing, today, to what you see, will cause you problems in the near future and have a negative effect upon your quantity and quality of harvest?

A huge issue you are going to have in the next couple-3 weeks is managing your moisture content in your pots. Failure here will decrease your harvest, or significantly increase your veg time.

Overwatering and overfertilizing are the top 2 mistakes made by new weed farmers. You are setting yourself up to over water. In fact, it is going to be VERY difficult to not overwater in your case. I consider myself an expert at weed farming, and I would have a helluva time not overwatering those plants.

Those seedlings should be in a pot about the size of a 16oz. plastic cup. A 4 gallon pot is way too big for your setup and plants that size. You should then have another size pot to transplant into before you jump to the 4 gallon pot size. I would advise 3 different pot sizes for your grow.

You need to be gentle, but I personally would make the very first task to repot those seedlings into an appropriate sized pot. You will harvest less (because your plants will spend the first few weeks of their life water stressed and not grow as much as non-stressed plants) if you continue to try to grow those seedlings in a 4 gallon pot.

I would repot those seedlings before I did anything else. I would make it a priority.

The second problem that is going to have you chasing your tail is this:

my tap water is fairly high with a ph of about 8.3

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You've come this far. RO filters are relatively cheap, and if you don't want to go that route, filtered water isn't too pricey, compared to all of your equipment/nutrient costs.

You are going to fight nutrient lockout in your rootzone, and any pH down you use deterioates the quality of your nutrient solution.

Maybe someone else will chime in on the pot size issue. Just trying to help. Let me know if I didn't and more info would be of use ...

Thanks for the reply,

The reason they are in 4 gal pots to start off with, is they are auto fowering strains. I have read that they do not take repotting very well, and that this is the best way to go about it (If you can avoid over watering) I know it looks a little out of the ordinary but that's just the route I chose to go with the information I have read.

I thought about getting an RO water filter, but I also read that if you go that route you will have to supplement with cal/mag. I figured I would try the tap water route and get the RO system if needed. I definitely didn't expect to run into problems this soon.

I have added no nutrients other than the ewc, and the myco madness

Smoke report?

Fly by Night said:

Smoke report?

Click to expand...

I'll let ya know in bout 60 days, if they turn out that is..

That is a pic of damage from off gasing

I add 1/3 more coco to my promix, have never added lime and I have never had ph problems. I thought I did at one point but I was overfeeding and it had nothing to do with ph. So maybe it's the lime or its just something they do when they're small and will grow out of it. And Cat Jockey is totally right about the pots being too big. Plants grow a lot faster when the promix is on the dryer side. So when you over water those 4 gallon pots it'll take way too long for the oversized pot to dry out and the plant will be growing slow the whole time.

I understand the caution that must be taken to prevent over watering. Other than the 4 liters the one day, they only get about 200ml of water very other day or so..

I appreciate the input about the over watering, but are their any other suggestions out there? I can assure you they are not currently over watered

From what I understood using too much dolomite lime wouldn't have such adverse effects, because it is only a ph buffer, it will bring the ph up or down to 7. 7 is slighly high, but when adding nutrients to water it naturally makes it acidic, same with the peat that the pro-mix is made out of. Also I have read that dolomite lime takes awhile to interact with the soil, so I can't see that having an effect so early on, could be very wrong tho, thats why I have come here. I don't know what to do.. but digging them up and repotting them is my last resort.. especially considering they would be going back into the same soil, minus the dolomite lime / ewc.

I did a soil test the other night and it showed it at about 6.5 as far as I could see.

I plan on using earth juice, bubbling tea, so I shouldn't have to use much ph down (mix it bubble for 1-2days, and catch it when the ph is at 6-6.5. The ph up/down that I have is from earth juice as well, claims to be natural, safe for organics.

Maybe it was the myco-madness??

Seems they are perking up abit, I gave them earth juice microblast at 1/4 strength 2 days ago, and the yellowing is starting to go away.. I think that giving them too high of ph water for their first 2-3 days definitely caused my problems, or were a major contributing factor.