Overfeed? Maybe P deficiency

[Hugo]

You just need to bring her back into a good pH range. And after I'd check for P def.

 

[dwarven]

Right now the PH of the run off water is around 6.5

I'm a bit confused now. After stabilize the PH, how should i know if there's a P deficiency. Is she supposed to recover if it was a PH deficiency? Or if not, i should assume that if in a few days she remains the same it's related to P?

I must be honest, i don't know how much time cannabis could take to recover from PH problem or P deficiency (right now she has 7 weeks, i suppose she will have 2 or 3 more weeks until harvest or so). Damn, growing cannabis can be really hard compared to others plants i grow at my farm but what well, i'm loving it ;D

 

[agito]

PH is not a deficiency. It blocks absorption of certain minerals and elements leading to a deficiency. I would start them on a feed of 1ml grow 3ml bloom next feed and add a small amount of powdered shells or gardening lime to future potting mixes. or just PH up your water a touch. It may just be a touchy strain such as whites or blues are known for it.

 

[Muddy]

With run off of 5.5 your soil pH is too low as I suspected. Next grow you'll need to add some dolomite lime to your soil mix to bring it to the proper level. In the mean time the fastest way to raise it is to use hydrated lime. It's a very fine powder, like flour. Add 1 tablespoon per gallon of feed. Wait 3-4 days and then check your run off again. Once you get your soil in the proper range the plants will be able to uptake the P and your plants should be fine.

You still have time. Most autos go 11 - 12 weeks, not the 8-9 that the seed banks advertise.

 

[dwarven]

I see.

Well tomorrow i'll be preparing my outdoor ground to transplant my seedlings and now i know that i must pay more attention to the soil mix than i excepted. And just in case, i'm gonna send a sample of the wells water of the farm to examine the PH and other stuff (i've done that a few years ago and the results were great for consume, better than water tap).

I'll start to feed this plant on the next water.

I've noticed now that roots are already coming out from the holes. A week after i double potted, the roots started to comming out from the holes so i was waiting for the roots to air pruning it self and they did, but now they're leaving the holes again but i can't make another double potting to this plant because i don't have enough height on the grow room. As she's already full flowering is it worth to transplant her? I guess that during flower she wouldn't need more roots mass, but on the other side she may need more frequently water because the root bound (if that's the only disadvantage i don't mind at all).

 

[Hugo]

I think it's actually a good thing dwarven, because there will be more roots in the end. Perhaps I'm wrong, but I would consider longer pots and/or hydro next time you do indoors

Muddy, what would happen if I used tap water to level out pH? I've done a flush recently and I think the ambient has improved but i still got 5.8 firstly and then 6.2 on the run-off of the biggest pot (30l +/-). I believe I've killed some or all microrrisas, but I've also introduced chlorine to the plant ambient. I'm going to get some dolomite lime tomorrow, although I don't know what it is!!

I hope this brings more insight to the subjet.

 

[agito]

Im not muddy you can use tap water to level the ph but your intial tap water needs to have an intial ph of 7 to stop the issues happening again. if you leave the water out for 24 hours this will get rid of the chlorine so use this time to add the lime as muddy has said. if the plants are in late flower i would not transplant as the roots dont grow much in flowering.

 

[Hugo]

ThAnk you agito

 

[sativalover]

I think it's actually a good thing dwarven, because there will be more roots in the end. Perhaps I'm wrong, but I would consider longer pots and/or hydro next time you do indoors

Muddy, what would happen if I used tap water to level out pH? I've done a flush recently and I think the ambient has improved but i still got 5.8 firstly and then 6.2 on the run-off of the biggest pot (30l +/-). I believe I've killed some or all microrrisas, but I've also introduced chlorine to the plant ambient. I'm going to get some dolomite lime tomorrow, although I don't know what it is!!

I hope this brings more insight to the subjet.

depends on the tap water to start w/ if it is ok or not if it has high ppm/tds doesn't matter if you adjust ph or not it will still cause lockout
as far as the microbes they are fairly resilliant and the ph wasn't off enough to effect them much butt....
your more likely to kill them w/ too high levels of phosphorus or overwattering than ph levels
if you were adding chlorinated water this will effect the ph like your experiencing stop introducing chlorine while wattering and start flushing w/ some ph adjusted rain water or Reverse Osmossis water
if you are forced to use tap water well it can change alot depending where you are at some can be used other places it is a tragedy
when people ask about how to increase yield the first thing i ask is what kind of water are you using
if you bought a high performance indy 500 car that required racing fuel
would you give the car 89 octane and expect the same results???

 

[Hugo]

Thank you sativalover