Yellow/Burnt Tips

[Danielsaaan]

Problem: Yellowing and burnt tips.

Medium/grow method: 5 gallons - BioBizz Light with additional perlite. Hand watering.

Feed: and supplements used: Fox Farm
Trio - (with the following schedule) - at half dose. None of the solubles.

water source: Tap. PH’d: 6.4-6.6. Let water sit out for 24h+ before use.

Strain/age: Mephisto - Strawberry Nuggets - Day 47
light used: Mars Hydro FCE4800 - at around 40.0 DLI (24/0)

Watered with plain water yesterday. PH ~6.4 with Quillaja and Recharge
Last feed: 03/30: 1tsp Grow Big, 1tsp Tiger Bloom, 0.5tbl Big Bloom. Plan on using only Tiger/Big Bloom going forward.

Thanks for any and all advice!

Climate: 71F, 45RH. 2 oscillating fans, exhaust fan.

 

[Bob's Auto's]

Hey D,

Your VPD (1.26kPa) is way to high for these ladies. lower this to 1.04 - 1.14 and the plants will be able to breath and exchange moisture again..
Check this VPD chart out. It's been a lifesaver for me!!

 

[Danielsaaan]

Hey D,

Your VPD (1.26kPa) is way to high for these ladies. lower this to 1.04 - 1.14 and the plants will be able to breath and exchange moisture again..
Check this VPD chart out. It's been a lifesaver for me!!
View attachment 1580129

That’s the same chart I try to follow! So raise my RH a tad? I can’t really do anything about temperatures right now - Northeast basement grower. I thought 71F and 40-45 was pretty solid for mid flower, no?
Appreciate the insight!

 

[Bob's Auto's]

That’s the same chart I try to follow! So raise my RH a tad? I can’t really do anything about temperatures right now - Northeast basement grower. I thought 71F and 40-45 was pretty solid for mid flower, no?
Appreciate the insight!

If temperature is a static variable then yes, raise the humidity to 50-55%. You'll notice that the plant's will activate again. Just be careful with watering them the first days. You don't want the soil to sog up, right

 

[Danielsaaan]

If temperature is a static variable then yes, raise the humidity to 50-55%. You'll notice that the plant's will activate again. Just be careful with watering them the first days. You don't want the soil to sog up, right

Appreciate it. I’ll see what I can do!

 

[Danielsaaan]

Here they are after a couple of days. Got my RH up to 50%. They look burnt to me. Idk from too many or not enough nutes?Should I water only the next week or so? Thanks all!

 

[paulg]

I think some of the newer growth is looking better. Be patient, stick to the program and light up a big one. That’s my two cents!

 

[Bob's Auto's]

Yes, give it some time.
Plain water, no nutrients, there's probably more then enough in the soil anyways.
If you can add some bacterial product like Bactrex to the water. These guys do all the heavy lifting in the soil
Remember, less is more. You're far more likely to overfeed then the other way around.