Phosphorus deficiency??

[de Toke-ville]

Cinnamon by FMS
About 15 days old
organic soil mix--Orchid planting mix by Unigro
+- 2 ltr pots
added Kelp meal and Worm Castings and perlite
Transplanted (from solo cup) about 5 days ago when i first noticed probs
Growing under 125w 6400k Envirolight CFL (about 4 Cm from tops)
average temps 78-80 degrees F/ RH 33-40%


At first I thought it might be a K prob with the low hunidity we've been having. But from reading and looking at pics, it looks more like a P deficiency to me. The other thing is that the soil seems heavy and maybe too densly packed. I understood that this could effect phosphorus uptake. On the other hand I've got plenty of chunky-style perlite in there and the mix does drain well. Growth from seed has definitely been slow overall even though they seemed quite healthy their first few days.

Ideas?


Thx and Peace everyone...

 

[bergerbuddy]

NO IT IS NOT A PHOS DEF!!

I think ur substrate is too hot bro... just give it some plain PH'd water for the next 10 days or so.. till it starts growing healthy!!

At this stage plants don't need much.. if you have a good substrate you don't need to fert at all till 30 days or so!

Peace
BB

 

[de Toke-ville]

Hope you're right

Hope you're right

NO IT IS NOT A PHOS DEF!!

I think ur substrate is too hot bro... just give it some plain PH'd water for the next 10 days or so.. till it starts growing healthy!!

At this stage plants don't need much.. if you have a good substrate you don't need to fert at all till 30 days or so!

Peace
BB

Yeah, I use this mix specifically so I don't have to fert at all. My plan is to transplant into more organic ferted mix before going to flower and then not adding anything until mid-flower. Hope you're right, berger, but this particular plant also has a very red stem, hence the p suspicion.

Also, before transplant they started in a much lighter mix (Unigro's African violet mix) and started very healthy. Since the prob seemed to have started about 10 days in their orig container, made me think deficiency.

thx for the input...

 

[Iluvtomatoes]

looks like too much too soon, I give them only .4-.6 ec after they show their second set of true leaves. Up until then maybe a drop of b-1 or something like that for the first 2 weeks but other than that -- ph'd water...

Recommend flush or even replanting without all the additives--GL bro

 

[de Toke-ville]

That's 2

That's 2

looks like too much too soon, I give them only .4-.6 ec after they show their second set of true leaves. Up until then maybe a drop of b-1 or something like that for the first 2 weeks but other than that -- ph'd water...

Recommend flush or even replanting without all the additives--GL bro

I think a consensus is building, LOL

Actually makes me feel better 'cause i can do what i usually do...

Nothing!

 

[bergerbuddy]

Hey bro... try doing this... The next time u water give it a PH of 6.3 then the next time give it PH 6.5-6 then the next time PH 6.1....

I have found that at early stages a HIGHER PH is more useful than the lower ones only because I like the nitro to get taken up and for the plants to start rocking... then I worry more about the micro nutes which come into play in the lower PH's... But I would give it a varying PH.. between 6.1 up to 6.7 that way it gives an opportunity for your nutes to get taken up... I suspect that the soil and PH just need to get right and some N become available that little plant will start going!!

Peace
BB

 

[de Toke-ville]

^^^^^that sounds like good advice. My runoff tested around 7 (old fashion water sample test) so, i was thinking it was a little high. I just checked and it doesn't seem to be getting worse, so maybe the N is starting to go. I'm too lazy to ph my water too much, unless it's an emergency, lol. Good soil mixture with Dlime in it has always done me right. But if I'm wrong, i guess a little work to save my girls would be in order.

Keep it green...

 

[ZeusOGrefugee]

If ur soil mix is for orchids, it may be too acidic...MJ doesnt like too high or too low PH...just in the middle...IMO!!!

 

[Babombeez]

I will use Fox Farms ocean's forest soil and make sure not to add nutes for at least a few weeks because the soil already has a nice supply of stuff... it says about 30 days worth of nutrients... try flushing with pure RO water or epsom salts and get your pH to about 6.5... You can add about 10 drops of dish soap to your water and flush ..this works very good and then after a few waterings with just water mix a very light nutrient solution and feed...

Beez

 

[de Toke-ville]

Update

Update

Thanks for the advice everybody. It turns out I do have a ph problem--just not the one I thought!

Been using store-bought RO water and that shit is ph 8+ !!!

It was weird because I think I forgot to mention I've got Dolomite lime mix in my soil so ph being too low seemed, um, unlikely. Plus a batch that I just mixed for my newly rooted cloned without lime (forgot, stoner) was working great. Well, with a water ph of 8 I now have my answer.

I live in SoCal so, mytap has something like 300-500 ppm and a high ph. I think I will leave the D-lime out of the mix from now on, forget the RO water and just use tap that has sat out enough to dissipate the clorine.

I'll update after next transplant and let you guys know how its working out.

Keep it green

 

[titoon29]

Hello,

You can grow without any problem at ph8.5, friends of mine run with that with good results.
I would say your problem is coming from too much water given, ph problems in early growing are not common. But keep your ph at about 6/6.5 it's better, and don't give it to much water !

Titoon