New grower; Frosting on new flowers, powdery mildew or trichomes

[BlueCrabGuy]

Hi Growers,

I am new to this and want to confirm I am looking at trichomes and not powdery mildew.

Can you please let me know if the frosting on the leaves around the flowers looks like trichomes or powdery mildew.

Again, I am new to this so sorry if this is a dumb question.

These are 4 weeks into flowering, and they are Blueberry Skittzles.

Thanks Growers!
BC

Notice only the leaves near the new flowers have frosting.

 

[Captspaulding]

All trichs. No Pwm.

 

[billoddy66]

Trichomes to me

Do you think pH could be off?

 

[Captspaulding]

I’m thinking veg nutes where tapered off too soon. I would toss castings on that and up the cal mag a dose or 2.

 

[Dub_City405]

No pm from what I seen.

Just finished drying gonna start trimming up this Gelato now

 

[BlueCrabGuy]

Some more pictures of the grow.

 

[Captspaulding]

Some more pictures of the grow.
View attachment 2026825View attachment 2026826

Looks a little hot in there. What is your light set at? Wattage ect?

 

[BlueCrabGuy]

 

[billoddy66]

What humidity are you running with the humidifier on?

 

[BlueCrabGuy]

Looks a little hot in there. What is your light set at? Wattage ect?

4x2 tent with a 250w Migrow light at 100%. The temp in the tent is up to 78 during the day and down to 68 at night. I had it set up for VDP at 1.1 but just changed it to 1.4 to get the humidity down in the 50's.

Mix per gallon is 1ml Cal Mag, 5ml Flora Micro, 3 Flora Grow, 12 Flora Bloom. Watering on 8/17 was just water (every third watering is just water). The above mix was used yesterday for the first time. The first week after switching to 12/12 I kept feeding the veg formula. After that I incremented the nutes up to the level they are now. I used this chart: https://www.howweedgrow.com/Howweedgrow Ultimate Chart Cheat Sheet.pdf

Thanks Captspaulding,
BC

 

[Captspaulding]

Back that lights power down to 70%, the proximity to the canopy is a bit close to run at 100% imo. I’d back it to 70, and then creep it up if the plants ask for more. Just fyi, I finish most of my runs at 70-75% wattage. I think a lot of your fade is from cal mag uptake being on overdrive. I’d up it to 5ml a gallon for a couple feeds.

 

[BlueCrabGuy]

What humidity are you running with the humidifier on?

I have been setting the RH based on VDP = 1.1. Unfortunately, that has kept it mostly in the 60's.

I just changed the VDP to 1.4 and I will monitor the VDP and RH. Right now, it's 75 degrees and 55% humidity with a VDP = 1.34.

Any suggestions on the VDP, RH? The room the tent is in is usually between 69 and 78 degrees with a RH in the upper 40's. I turned the exhaust fan up in the tent to try to counteract the heating from the grow lights.

Thanks Billoddy66,
BC

 

[BlueCrabGuy]

Back that lights power down to 70%, the proximity to the canopy is a bit close to run at 100% imo. I’d back it to 70, and then creep it up if the plants ask for more. Just fyi, I finish most of my runs at 70-75% wattage. I think a lot of your fade is from cal mag uptake being on overdrive. I’d up it to 5ml a gallon for a couple feeds.

Thanks Captspaulding. When you say fade, are you saying the leaves are a light shade of green? I reduced the light to 80 percent. I can only adjust by 20% increments. How can I tell if the plants are asking for more light?

 

[billoddy66]

I'm not too hot on vpd measuring I just try to keep in temp and humidity ranges roughly

You have quite a lot of fan leaves in there and if you're running over 60% humidity youll be more at risk of PM and other issues that come from those conditions

I'd be looking at taking some fans leave off to expose all flowers to light and reduce risk of issues etc

Calmag is a good shout I think

You could check your runoff pH too

 

[Captspaulding]

Thanks Captspaulding. When you say fade, are you saying the leaves are a light shade of green? I reduced the light to 80 percent. I can only adjust by 20% increments. How can I tell if the plants are asking for more light?

Yes, it’s not a crazy fade or anything. They look decent. Just a bit light. That 20% reduction should be good. Your familiar with the term “the leaves are praying” I assume, well when they want more light, they will almost go vertical to reach for it…..

 

[Captspaulding]

I'm not too hot on vpd measuring I just try to keep in temp and humidity ranges roughly

You have quite a lot of fan leaves in there and if you're running over 60% humidity youll be more at risk of PM and other issues that come from those conditions

I'd be looking at taking some fans leave off to expose all flowers to light and reduce risk of issues etc

Calmag is a good shout I think

You could check your runoff pH too

Agree on the fan leaves, I usually go for the largest most invasive fans covering top sites, mostly the fans pointed towards center, I leave almost everything on the perimeter.

 

[billoddy66]

Especially in later flower you don't want to be in 60s is my understanding

 

[Captspaulding]

Especially in later flower you don't want to be in 60s is my understanding

Facts! I shoot for 45-55%

 

[billoddy66]

@Captspaulding
I've had a little wave of whitelfys make themselves quickly at home in week 4/5 of flower. Any tips on what to do? Removed the worst affected leaves-eggs wise and wondering if i have options of spraying anything at all this late?

 

[Captspaulding]

@Captspaulding
I've had a little wave of whitelfys make themselves quickly at home in week 4/5 of flower. Any tips on what to do? Removed the worst affected leaves-eggs wise and wondering if i have options of spraying anything at all this late?

Well buddy, that is tough, white flies are gross little shits ain’t they? Normally I’m a captain jacks dead bug guy, but you are def past the point I would suggest any type foliar spraying. You may just have to be a crazy person and picks them of and stick them in soapy water until you can squish em all, and I would spot wash as needed. I get them here on a lot of my pilot plants. They love those here. How much of your crop is affected % wise?