Deficiency under quantum boards

Z

Zappa66

Well-Known Member
howdy, was hoping foals could give me a hand here. I have had this same problem with multiple grows since switching to the qbs. First time I have tried to monitor ph.

- around 360w of 3000k quantum boards
-peat based soil with a generous cup of pro grow per 4gal pot.
-feeding with one tsp fox farm grow big per gal. (Per pot), alternating watering with just water.
- adjusting my well water from 7 to around 6ph
-runoff is also staying at around 6ph
-using ph strips so it’s ball park measurement.

Looks like cal. Mag is needed and just picked up a bottle. Is this a cal/mag deficiency and if so what amount of the calmag should I apply?

Regards,

Zappa66 FE0FF85C-8778-46CD-A390-408424D45E04.jpeg 2464CC4B-5F27-4460-BF97-737C2C345373.jpeg 11887FE6-ABF0-461E-B87A-B880BC3314FC.jpeg7246DAE1-07EC-490F-B8A2-EE65177F9CC3.jpeg
 
Mullalulla

Mullalulla

Well-Known Member
Zappa66 said:
howdy, was hoping foals could give me a hand here. I have had this same problem with multiple grows since switching to the qbs. First time I have tried to monitor ph.

- around 360w of 3000k quantum boards
-peat based soil with a generous cup of pro grow per 4gal pot.
-feeding with one tsp fox farm grow big per gal. (Per pot), alternating watering with just water.
- adjusting my well water from 7 to around 6ph
-runoff is also staying at around 6ph
-using ph strips so it’s ball park measurement.

Looks like cal. Mag is needed and just picked up a bottle. Is this a cal/mag deficiency and if so what amount of the calmag should I apply?

Regards,

Zappa66 View attachment 4398711 View attachment 4398712 View attachment 4398713View attachment 4398714
Click to expand...

a little cal def, mostly mag. Under all my quantums, I run full stregnth cal mag .... with every watering ... you need to under led's.
 
CoB_nUt

CoB_nUt

Well-Known Member
That is incorrect. You don't NEED to run cal-mag under leds. Get your environment correct.It AIDS in nutrient uptake.
 
Bernie420

Bernie420

Well-Known Member
Zappa66 said:
howdy, was hoping foals could give me a hand here. I have had this same problem with multiple grows since switching to the qbs. First time I have tried to monitor ph.

- around 360w of 3000k quantum boards
-peat based soil with a generous cup of pro grow per 4gal pot.
-feeding with one tsp fox farm grow big per gal. (Per pot), alternating watering with just water.
- adjusting my well water from 7 to around 6ph
-runoff is also staying at around 6ph
-using ph strips so it’s ball park measurement.

Looks like cal. Mag is needed and just picked up a bottle. Is this a cal/mag deficiency and if so what amount of the calmag should I apply?

Regards,

Zappa66 View attachment 4398711 View attachment 4398712 View attachment 4398713View attachment 4398714
Click to expand...

Looks like mag with a touch of potassium deficiency.
use epsom salt at about 200 ppms for a couple of feedings

I wouldnt want to use cal mag full strength every watering not needed or if you want to do that 1/4 strength is enough imo as a supplement.

get a microbe product and use it once a week.

measuring run off isnt needed ph or ppms
 
CoB_nUt

CoB_nUt

Well-Known Member
Zappa66 said:
My temps are in the low 60s, my understanding is that qb grow better in the 80s but that’s just how it is in my situation.
Click to expand...
This is your issue. They aren't transpiring nor up taking the nutes correctly relative to their environment.

I assume you done runs with the same soil,nute,space etc without the Qb's? Where these issue prevalent then?

You changed lights, your environment changed. Try to get your environment decent,before you start adding inputs. This would be my suggestion.

If you can't make any tweaks to your environment,Bernie offered up some good info.
Don't go full strength with the cal-mag if you use it,it could lead to other issues. Use Epsom salt alone for a mag issue. I think your soil has the nutes the plant needs, your environment is fighting it tho.
 
Z

Zappa66

Well-Known Member
It’s currently 70 ish percent. During the winter it is quite low due to the furnace (tent in basement)
 
Merlin1147

Merlin1147

Well-Known Member
Zappa66 said:
It’s currently 70 ish percent. During the winter it is quite low due to the furnace (tent in basement)
Click to expand...
Temps in the 60s and Rh in the 70s? Your VPD is very low. I agree a little of Cal Mg would help treat some symptoms but A dehumidifier may solve the cause of the problem. It will generate some heat and drop the Rh. Low VPD can cause all sorts of deficiency and other problems. You can chase your tail trying to solve low VPD problems looking for answers in a bottle. You need transpiration to get Ça and Mg to the leaves.
 
dandyrandy

dandyrandy

Well-Known Member
I run a dehumidifier in my area in the basement. Not a tent. But it raises my temp and gets my rh where I want it. Set at sixty % keeps me good. The last few weeks I run it at 55%. No mold issues. ymmv
 
Z

Zappa66

Well-Known Member
Thank you all for the good and well reasoned advice. I’m going to start with Epsom salts for a few applications. Having the tent in the basement has caused some complications that I have not had to deal with in previous situations.
 
Z

Zappa66

Well-Known Member
I just ordered a little compact dehumidifier that will tuck nicely in the bottom of the tent. Hopefully this will improve the situation. Seriously guys and gals I do appreciate all the advice.
 
CoB_nUt

CoB_nUt

Well-Known Member
Zappa66 said:
I just ordered a little compact dehumidifier that will tuck nicely in the bottom of the tent. Hopefully this will improve the situation. Seriously guys and gals I do appreciate all the advice.
Click to expand...
Yup, the Epsom salts are a bandaid for now. Get that environment decent and you'll be good. VPD was what I was alluding to when I responded initially. @Merlin1147 has you covered. As I stated earlier, your environment was the major cause of your issues/nutrient uptake.
 
Bernie420

Bernie420

Well-Known Member
all that and read up on what microbes do, go buy some and use it once a week.

Is it really humid where you live or just in the basement maybe just exchanging the air might solve the humidity issue.

Im posting this up because the nutes you use ,just noticed, could really use microbes to help break it down for the plant.
 
Z

Zappa66

Well-Known Member
Just the basement, stays about 60 year round, humidity fluctuates with the seasons a bit. During the heating season the rh is 30ish. The room adjacent to basement was re framed this year and hasn’t been insulated yet.
 
Bernie420

Bernie420

Well-Known Member
Zappa66 said:
Just the basement, stays about 60 year round, humidity fluctuates with the seasons a bit. During the heating season the rh is 30ish. The room adjacent to basement was re framed this year and hasn’t been insulated yet.
Click to expand...
so anyways my point being if your not exchanging air you might want to and that may take care of your humidity issues. and not run a dehumidifier which you will have to monitor and empty unless it drains in a floor drain .
 
Z

Zappa66

Well-Known Member
Update.

So I was able to get a little cheap dehumidifier in the tent. It has not brought the rh down very much. I think it’s two under powered for the amount of rh in the room and or the amount of air exchange.

However the dehumidifier along with venting the clone/veg tent into this flowering tent has brought the temps up into the high 70s-80f. Rh is still at around 60.

I am now on my third application of e.salt. I assume I can’t apply it forever when should I stop applying it?

What temp vs rh should I shoot for? I can lower the temp easily by increasing my ventilation fan speed.
 
You must log in or register to reply here.
Top