Bud rot starting? Or just purpling of the bud leaves?

[wallywonks]

So this WW Auto is starting week 12 since germ. Either week 8 or 9 of flower.

The top of the cola is showing a coloration. It looks purple. There's so much trichromes though that it throws the color off.

I'm hoping it's just cause the tent is around 68 or 68F at night. This girl is sitting in the corner underneath the carbon filter that is where all the air pull is drawing from the bottom vents. So the air Temps updraft may be 66 to 67F.

Thanks in advance

 

[bam0813]

Can’t tell much with that info or pics other than I don’t see bud rot in those two pics

 

[mudballs]

agree with bam, not seeing any signs of it

 

[OneMoreRip]

spots on leaves, check feed and ph of medium

 

[wallywonks]

spots on leaves, check feed and ph of medium

Yeh she had heavy Calcium deficiency. The pH was below 6 and I had to flush her a couple weeks ago. The fan leaves are starting to yellow out too. Everything I read says in the final couple weeks the fan leaves will start to yellow. The orange brown spots were Calcium issues.
Basically what happened I was using Dr Earth Organic feeding schedule and I used the 1-1-1 Pot of Gold for the one feeding week.
It was 3.2 pH when I mixed it and took 32 ml of pH up to get it to 6.7. (I use Potassium BiCarbonate to pH up my nute mix now. It works very well. I got it to 1 tsp and my nute mix is 6.8pH.) I put 2 cups on 3 of the plants and 1 cup on that WW Auto.
I forgot to label the seeds when I germd so I had no idea which were the 2 skunk photos or the 2 WW Autos so I had to wait till the 2 flowered to tell.

What happened was Nitrogen tox on all the plants. They got nice dark green and some leaves clawed. The skunks handled it better than the autos. But the one Auto is bigger she is 37" and different phenotype then this one which is ruderalis candlestick which got only 21" tall.
So I stopped feeding them for like 3 weeks. I just gave them straight pH 6.8 tap water. 177 ppm

All 4 plants have the brown spots. So they all are getting Ca deficiency in flower. The skunks just started showing them in week 4-5 of flower.
I used 1/3 FFOF and 2/3 FFHF amended with additional EWC when transplanted. Also on transplant top dressed Dr Earth Tomato Veg Herb and additional EWC. I was just following Dr Earths Organic Cannabis Feeding schedule.

Now Im using Fox Farm Bloom nutes and Calmag due to the Ca deficiency. Im keeping an eye on any further spotting for now. It should stop now. Last 2 feeds I used 5 ml/gal of Calmag.

Its my fault I forgot to add dolomite lime to the Fox Farm soil when I prepped the fabric pots. Although the Dr Earth Organic dry nutes had 7% Ca.
So maybe it was pH lockout since I didnt buffer the soil with the Dol Lime.

It still seems Im going to get a nice harvest so far. The one super skunk she is flowering very nice and the piney smell is off the charts. SO strong the big AC infinity Carbon filter is not killing all of the smell.

 

[wallywonks]

Oh and the top leaves got dry and crispy. I also think theres heat/light stress or maybe cause I dropped the humidity down to 35-40% too soon.
Ive seen others grow diaries that showed they had humidity at 60% until the last week or two of flower.
So many different sites say different things. Some say in flower to lower it below 40% to avoid mold and bud rot.
But with the VPD if the Mars Hydro 3000TS lights are on and its 75-77F in the tent then 35-40% humidity is probably too dry.
Maybe Im being too careful and making it worse. I do use a watering schedule, moisture meter and also lift the pots to tell how heavy they are.

The last 3 weeks Ive been running Day temps at 75-77F and night temps run about 68-70F
Humidity in day time is 40-50% and at night 35-50%. Im using a combo of a window Aircon with a medium size GE dehumidifier with a hose in a 5 gal bucket for temp and humidity control.

 

[OneMoreRip]

thats a lot of reading. im good for a few lines.

any decent nute should have everything in it, 1 bottle. make your medium the correct ideal ph before planting anything, keeping in mind things like the ph of your water being higher or lower which may affect the ph medium slightly.

the healthier the plants root zone, they more they can tolerate non optimal environments above ground

i think dolomite lime is okay, i use it currently but I am thinking it is best to have optimum ph without, just using soil mix. just a thought, I haven't researched it much. yeah lime has benefits aside from ph buffer, but Im done buying anything because everything we need to grow plants is right outside.

my humidity goes from ~40s to ~70s, veg and flower never needed to care about it

sounds like you maybe mixing organic and salt nutes, i don't know anything about that and wouldn't advise it based off the nothing i know.