Sudden change in plant health during flower.

[Baron Von Thunderclapp]

Auto AK strain.
Grown in perlite soil.
8litre breathable pot.
Ph constantly tested between 6.3 and 6.8. Run off slightly lower.
In veg stage used Formulex nite solution from grow supply shop in uk. Used only half suggested amounts. Switched to Big bud two weeks ago also on half quantity.
Small grow tent 600x600 x 1400.
Started in veg with full spec led but when flowers appeared fitted Mars hydro ts1000.
Day temp 22-26
Night temp 18-22
Humidity now in flowering down below 40
Vent fan drawing in fresh air from house and extract into loft space where tent is situated.
Ram fan blower on constant.
Dehumidifier in tent with 2x 40watt heaters controlled by smart app to maintain temp.
No co2.
I change the leds at the the end of veg to mars hydros, this May have shocked them but if anyone has seen this leaf colour and texture change I would be grateful of the info as it’s not looking good. I flushed with ph’d water 2 days ago thinking it might be nute looked or something and I’m now waiting for the soil to dry right out before doing it again. Can’t work out if it’s nute deficient or over water or light problem.

 

[Renfro]

half suggested amounts.

Remember when they are flowering their need for feed goes through the roof.

 

[Baron Von Thunderclapp]

So you recon I’ve underfed not over?

 

[Renfro]

So you recon I’ve underfed not over?

Indeed. They look very hungry, definitely for phosphorous.

 

[Renfro]

@Baron Von Thunderclapp It says you are a new member, welcome to our forum! I do hope that we are good company.

 

[Go go n chill]

Hey bud, there is much going on there.
1 leaf curl
2 leaf canoeing
3 calcium deficiency
4 purple stems on a strain that I don’t think gets purple? Especially with your temps.
I would re calibrate your Ph meter.
Many guys say testing the ph of your runoff doesn’t tell you anything BUT if it’s way off from what you fed with it definitely tells you that there is a soil and/ or lockout issue.
If it continues and you can’t seem to get ahead of it.... repot the girls..... they’ll stall abit but bounce right back, I have done it and it helped reset the plants .
Just my opinion from a humbled grower

 

[Renfro]

Good eye on the temps, I don't really think in celsius. Cool temps would limit phosphorous uptake. Those leaves definitely scream for phosphorous.

 

[Renfro]

With LED we want warmer not cooler.

 

[Baron Von Thunderclapp]

Hey bud, there is much going on there.
1 leaf curl
2 leaf canoeing
3 calcium deficiency
4 purple stems on a strain that I don’t think gets purple? Especially with your temps.
I would re calibrate your Ph meter.
Many guys say testing the ph of your runoff doesn’t tell you anything BUT if it’s way off from what you fed with it definitely tells you that there is a soil and/ or lockout issue.
If it continues and you can’t seem to get ahead of it.... repot the girls..... they’ll stall abit but bounce right back, I have done it and it helped reset the plants .
Just my opinion from a humbled grower

Hey bud, there is much going on there.
1 leaf curl
2 leaf canoeing
3 calcium deficiency
4 purple stems on a strain that I don’t think gets purple? Especially with your temps.
I would re calibrate your Ph meter.
Many guys say testing the ph of your runoff doesn’t tell you anything BUT if it’s way off from what you fed with it definitely tells you that there is a soil and/ or lockout issue.
If it continues and you can’t seem to get ahead of it.... repot the girls..... they’ll stall abit but bounce right back, I have done it and it helped reset the plants .
Just my opinion from a humbled grower

Hi

@Baron Von Thunderclapp It says you are a new member, welcome to our forum! I do hope that we are good company.

@Baron Von Thunderclapp It says you are a new member, welcome to our forum! I do hope that we are good company.

Hi. Really appreciate your input. I’ve just given them a full feed and will see how it looks tonight. If no change would you also suggest repot? Although f knows how I’m going to do that in the loft!!

 

[Go go n chill]

Hi


Hi. Really appreciate your input. I’ve just given them a full feed and will see how it looks tonight. If no change would you also suggest repot? Although f knows how I’m going to do that in the loft!!

Ya give it a couple of days see how the feeding goes. I always calibrate my meter

 

[Go go n chill]

Renfro won’t lead you in the wrong direction, many members have great insight but many don’t. Research who you are listening too.
Good luck

 

[Baron Von Thunderclapp]

I’ve been supper paranoid with the ph. I have 2 digital and a good old liquid test kit and get my Mrs to check the colour as I’m never that good. This is why I have trouble believing it’s ph as after nutes the ph goes in at 6.5 ish but then run off might come out as low as 6 or lower. I might repot tmrw as we have little else to do these days eh?

 

[Renfro]

This is why I have trouble believing it’s ph as after nutes the ph goes in at 6.5 ish but then run off might come out as low as 6 or lower

If it's going it at 6.5 and coming out at 6 or lower then the soil has to be pretty low. If I was to guess I was say in the 5's.

 

[Go go n chill]

I’ve been supper paranoid with the ph. I have 2 digital and a good old liquid test kit and get my Mrs to check the colour as I’m never that good. This is why I have trouble believing it’s ph as after nutes the ph goes in at 6.5 ish but then run off might come out as low as 6 or lower. I might repot tmrw as we have little else to do these days eh?

No shit
I use FFOF.

 

[Go go n chill]

If it's going it at 6.5 and coming out at 6 or lower then the soil has to be pretty low. If I was to guess I was say in the 5's.

I agree 100%.
And if you repot you might get through to harvest with just watering

 

[CptTripps]

I might repot tmrw as we have little else to do these days eh?

Exactly! I've no advise to offer, as I always listen to guys like @Renfro and @Go go n chill but can totally relate to having nothing but time on my hands these days. My grow room is surgical clean and organized right now.

 

[majjy_rane]

it´s sometimes impressive how much difference a decent ph-meter does. and always that thing with the calibrations. imo 1-way calibrations are the way to go

 

[Baron Von Thunderclapp]

If it's going it at 6.5 and coming out at 6 or lower then the soil has to be pretty low. If I was to guess I was say in the 5's.

If run off is low should we just up the ph when watering or is there other issues?

 

[Go go n chill]

Exactly! I've no advise to offer, as I always listen to guys like @Renfro and @Go go n chill but can totally relate to having nothing but time on my hands these days. My grow room is surgical clean and organized right now.

Lol yeah you could eat out of my drain trays

 

[Baron Von Thunderclapp]

Thanks everyone for chipping in too. Glad I found this place.