Lower leaves yellowing with brown patches, Help

istoned

istoned

Member
Hey all, this is my first grow and I have 6 plants growing from seed (feminized white widow and critical). I will be choosing 2 to 4 to keep as mothers. They started under T5s and are now under a 400 watt metal halide light. They're 6 weeks old now.
I've been watering when the top inch of soil is dry with local tap water (100-120 PPM) that i dechlorinate and adjust the PH to 6.2. I started using a mild dose of fertilizer and am now using 10ml/gallon of Botanicare Pure Blend Pro Grow 3-2-4. They are planted in a Pro mix Mycorrhizae Soilless mix. Right now they're in 1 gallon grow bags that have been shortened a bit. I topped the plants after the 5th node.
A few days ago I noticed some of the lower leaves of one of my plants start to become yellow with small brown patches, the top leaves however are doing fine. Another plant just started doing the same thing today so I would like to get this under control asap. Yesterday I flushed the plants with a gallon of 6.2 PH water each. I did research and couldn't figure out what the problem was..

Here are two pictures, the first of the full plant, the second of a lower leaf:
View attachment 2403321View attachment 2403323


Please help me identify the problem and suggest appropriate actions to take.

Thankyou,

istoned
 
budbro18

budbro18

Well-Known Member
they look like they need more nutes. could be N could be cal mag. could be K deficient.

just boost up the nutes a little.

also what kind of nutes do you have and which ones?
 
bleuballz

bleuballz

Well-Known Member
Hello istoned. I agree with budbro. ^^^^
but are you watering too much?
I use the same nutes as you, pretty much.
so if you have been giving them nutes, I'm gonna
say overwatering. ����
 
bleuballz

bleuballz

Well-Known Member
I've never used bags, so I don't know about putting more
holes in them. But.. Yes buy cal/mag. It's good to have around.
And yes, I would wait till it ( the bag ) feels lighter.
even if you need to buy a cheap moisture reader.
Oh and when you decide to transplant to a larger
container, I would add more perlite, or something to
help water drainage, and o2.
 
istoned

istoned

Member
Okay thanks, I just flushed them yesterday.. Should I wait until they fully dry again before upping the nutes? Or will they get worse while waiting?
 
past times

past times

Well-Known Member
The perlite should be mixed in when preparing the soil. A little late now unlss you are transplanting soon. You can add cal/mag to the new soil. You can also sprinle some on top of the soil and water into the plant with the next watering. It is a good idea to add a little. So if I were you right now I would spinle about 2 Tbsp of dolomite lime to the top and water in with some veg nutes.
 
bleuballz

bleuballz

Well-Known Member
Wait,wait... I'm high.
What flush? Don't flush. Not until you are ready to harvest.
ok. Here's what I think you should do.
If its not too much of a burden, buy bottles of
distilled water. Or go to a water machine for .25
Then add aprox 20mg of your Botanicare grow ferts,
per gallon. That should bring your ppms to around 900-1000
adding cal/mag will raise it like 200 ppms.
So it's your call on how high you want to go.
transplant her, and give her a good hot dose
900-1000 ppms. Till there is like 15% runoff out the
bottom. Leave her be for 3 days, and watch her
take off. Maybe put her in a 3-5 gallon.?
cant wait to hear about your results.
 
istoned

istoned

Member
Okay I just picked up some perlite, some 1.5 gal containers and some Cal-Max. Should I transplant before doing the nutrients? or do nutrients, wait 3 days and then transplant? I'll mix some perlite in for better drainage.

And if I don't use distilled water how much Cal-Max should I add? It says full dose is 5ml/4L. The PPM in my local water is supposedly 100 - 120 PPM
 
istoned

istoned

Member
I'm trying to keep the containers small for the next month so theyre easier to transport to where they will stay til they die.
 
bleuballz

bleuballz

Well-Known Member
istoned said:
Okay I just picked up some perlite, some 1.5 gal containers and some Cal-Max. Should I transplant before doing the nutrients? or do nutrients, wait 3 days and then transplant? I'll mix some perlite in for better drainage.

And if I don't use distilled water how much Cal-Max should I add? It says full dose is 5ml/4L. The PPM in my local water is supposedly 100 - 120 PPM
Click to expand...

Right on! So just mix up your soil/perlite ( I sometimes do 50/50 )
and transplant, then feed her. The new soil/perlite
should be dry enough for it. : )
I'd give 1/2 a teaspoon of cal. Or whatever 1/2 the reccomended
dose is. More in hydro/ passive hydro.
Ever since I tried 100% perlite, I like to use a lot in my
mixture. 100% perlite aka hempy buckets work awesome.
no worries of overwatering. Your nutes should bring your
water ph to around 5.5 or so.
 
bleuballz

bleuballz

Well-Known Member
istoned said:
Should I keep my PH at 6.2 though with some PH up?
Click to expand...
Yeah, I mean I hear 6 - 6.2 etc for soil is good.
for me, I run hydro, soil, hempys, etc.. At the same time,
and I don't use the ph up that I have. I just give the soil
plants the same nute solution I give the hempys, around
5.7 or so, with no visible ill effects.
 
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