Drastic change almost overnight

Strain - Yellow Brick Road
Medium - FFHF/EWC
Gaia Greens (all purpose/bloom)

Bloom given: 3 days before flip, f14, f33
2x2
Mars Hydro TS1000

Day 38

My single plant has drastically changed in the matter of a couple nights. I am curious what lead to such a dramatic change as I was facing no apparent issues prior.

During veg, and the first few weeks of flower, I could not run the light at more than 50% power. When i did, I would come back to find shade leaves attempting to turn away from the light. I assumed the light was too intense for a young, single plant in a 2x2. I ran at 50% until week 5 of flower.

We had some cold nights, so I tried running at 75%, and then 100% 2 nights in a row. After the second night, I found a few of the shade leaves with bold yellowing at the distal ends. After another night, the problem has grown to more leaves.

I don’t think this is something I can fix, but I want to learn to prevent it in the future.

I believe the current situation is caused by potentially a lack of nutrition - the extra light is driving more photosynthesis, but without enough food (nitrogen?) the leaves aren’t able to keep up with the light intake.

Im also considering the possibility that I’ve over-fed

second photo is from 10 days ago. I thought I was doing a good job lol

any tips or advice is greatly appreciated

Id just hit it with a flush @ 1/4 strength nutes and see how they react. I'd also try and free up some of those bud sites by taking some of those big ass fan leaves off.

It's not your light, it's not the top leaves, if your light was doing that it would of bleached your top.

You are probably getting lockout do to ph or overfeeding. What are you doing to give her a breeze?

Balanced nutes work fine by themselves. Skip the bloom for a bit, and see how it reacts.

ProPheT 216 said:

You are probably getting lockout do to ph or overfeeding. What are you doing to give her a breeze?

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500cfm exhaust fan extracting from the top, filtered inlet at the bottom, and a fan at the bottom so air doesn’t get stuck down there

ez_deezy89 said:

Id just hit it with a flush @ 1/4 strength nutes and see how they react. I'd also try and free up some of those bud sites by taking some of those big ass fan leaves off.

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These organic nutes are top feed, so what’s in the soil is in the soil already. I feed a little Ahead of schedule because I was seeing some yellow tips, thinking it was hungry

ProPheT 216 said:

You are probably getting lockout do to ph or overfeeding. What are you doing to give her a breeze?

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See above

ProPheT 216 said:

See above

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for sure.
Definitely looks like a major problem, as it’s getting near the top of the main cola now. I’ll try to make some sort of nitrogen-rich tea and hope to salvage something to enjoy.

My medium is incredibly dense/compact. Like, I can’t even break it up without feeling like I’m ripping up roots. What caused such hard soil?

Letting it dry to much, then when you water it just races past the dry spots and they never get wet

I would do a slurry test and check soil ph and see if you have a ph issue and things were locked out, rule that out so you can decide whether you over or under fed. And you may not be getting your soil wet

needs food. that gaia green takes time to be available to the plant. consider water soluble dry salts. you can dry amend or mix with water for instant availability

Hydrolyzed fish is the answer,quick shot of soluble food.
With Gaia always mix 50/50 veg bloom.Not near enough N in bloom 284.

400aZip said:

for sure.
Definitely looks like a major problem, as it’s getting near the top of the main cola now. I’ll try to make some sort of nitrogen-rich tea and hope to salvage something to enjoy.

My medium is incredibly dense/compact. Like, I can’t even break it up without feeling like I’m ripping up roots. What caused such hard soil?

Click to expand...

That’s potassium deficiency. Take a bamboo barbecue skewer and pierce the hell out of the medium all the way to the bottom. You cannot overdo it so go to town. Get UNDER the plant. All the way to the bottom. If it gets stuck in a big root just pull it out, move it over a hair and keep going. All of the medium! Then give a complete feed with the proper pH.

As soon as the next day go to town tearing it up again. This aerates the medium and gets oxygen to the roots.

hotrodharley said:

That’s potassium deficiency. Take a bamboo barbecue skewer and pierce the hell out of the medium all the way to the bottom. You cannot overdo it so go to town. Get UNDER the plant. All the way to the bottom. If it gets stuck in a big root just pull it out, move it over a hair and keep going. All of the medium! Then give a complete feed with the proper pH.

As soon as the next day go to town tearing it up again. This aerates the medium and gets oxygen to the roots.

Click to expand...

I golf and putting greens are punched every so often to let the roots breathe. I was wondering if it could do the same here. Awesome!

ProPheT 216 said:

Letting it dry to much, then when you water it just races past the dry spots and they never get wet

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I was told early on that HF doesn’t like to dry out. So I’ve been giving 1-2 cups of water every day except for the days when it still felt pretty moist.