Leaves curling and tip burn week 6 of flowering

[Brother_Antioch]

Hi, folks. I once again turn to your expertise in guiding me through this little hiccup on my first indoor grow. As the pics will show, leaves are starting to curl downward and I have some tip burn. The tip burn has been there for about a week, but the curling has only just started in the last day or so. I have noticed an increase in the burnt tips, and not just at the top of the plant.

So, the details:

- 240W Phlizon PH1200 light hanging 20" above the main canopy (although a few buds are about 4" higher than that) and I'm maxed out on my height for hanging the light. It also has no dimmer function. (next time!)
- Godfather OG strain grown in Promix HP.
- GH Flora Trio nutrients at half the recommended strength of their "average" feed schedule.
- Distilled water that is pH'd to 6.3-6.4 after the nutes are added. PPMs is in the 350 range.
- Watering her with 2L of water about every day and a half (when the pot feels light and the soil is feeling dry to an inch or so down).
- In a plastic 5 gallon bucket that is blacked out.
- Temperature is pretty steady at 26-27C and humidity is fairly consistent at around 50% throughout the grow.
- Currently at the end of week 6 of flowering (since flipping to 12/12).

If I've left out any pertinent information, please feel free to ask me and I'll get back to you as quickly as I can. Any suggestions as to what the problem is and more importantly, how to address it, are greatly appreciated. The grow has been going very well, mostly due to the great advice I've received here on the forums. I'd hate to see something mess it all up now, so close to the end and with the buds starting to look nice and frosty.

Thanks a ton in advance!

Cheers,

BA.

 

[Glomus]

Its nutrient burn, but honestly you'll be fine. I will push my nutrients to the point of leaf tip burn at times. The most heavy feeding is needed between week 2-5 after that it's just letting the buds mature. I prefer to stress my plants from week 7 on more high resin production, people say fluch but i just stop watering them week 8 and let them yellow out. Also looks like you did some heavy deleafing which can cause problems in the root zone. the leaves look very dark green so it seems like too many nutes.

 

[Brother_Antioch]

Its nutrient burn, but honestly you'll be fine. I will push my nutrients to the point of leaf tip burn at times. the most heavy feeding is needed between week 2-5 after that it's just letting the buds mature.

Thanks for the heads' up, Glomus. So do you think I should back off a bit on the nutrients, say reduce them by 10% or so and see how it does? I'm assuming that is also the cause of the leaves suddenly curling downward like that across the plant? I have read the last 2 weeks should be just flushing with straight water, and from what I understand I'm still about 3 to 4 weeks from it being ready to harvest. As I said, this is my first indoor grow, so there's a good chance I'm just overthinking it and worrying about nothing, after all.

Cheers,

BA.

 

[Glomus]

Thanks for the heads' up, Glomus. So do you think I should back off a bit on the nutrients, say reduce them by 10% or so and see how it does? I'm assuming that is also the cause of the leaves suddenly curling downward like that across the plant? I have read the last 2 weeks should be just flushing with straight water, and from what I understand I'm still about 3 to 4 weeks from it being ready to harvest. As I said, this is my first indoor grow, so there's a good chance I'm just overthinking it and worrying about nothing, after all.

Cheers,

BA.

Thanks for the heads' up, Glomus. So do you think I should back off a bit on the nutrients, say reduce them by 10% or so and see how it does? I'm assuming that is also the cause of the leaves suddenly curling downward like that across the plant? I have read the last 2 weeks should be just flushing with straight water, and from what I understand I'm still about 3 to 4 weeks from it being ready to harvest. As I said, this is my first indoor grow, so there's a good chance I'm just overthinking it and worrying about nothing, after all.

Cheers,

BA.

Yeah I think you can back off on the nutes alot for the rest of the grow. I would say your a lot closer to harvest then 3 to 4 weeks. Pistils look orange and the bud will just mature from here. I think you might have over fed and maybe pruned too much during the bud development? pruning can cause root shed and throw things off. I think you are overthinking it a bit. If you just gave them water and promix they would do ok, but the nutrients build up in the soil and if your watering/feeding every day and a half you need to account for how much is ending up in your soil. Most people over water and over feed and over prune. Just let em grow. If something is wrong with your bloom is easy to think that you need to feed them PK because that's something you have control over, but it won't matter how much PK you pump into them if that isn't the issue which the vast majority of the time it's not. Honestly the best grows are the ones I thought I might have been under feeding. Seriously lazy pot farmers grow good weed lol.

 

[Brother_Antioch]

Yeah I think you can back off on the nutes alot for the rest of the grow. I would say your a lot closer to harvest then 3 to 4 weeks. Pistils look orange and the bud will just mature from here. I think you might have over fed and maybe pruned too much during the bud development? pruning can cause root shed and throw things off. I think you are overthinking it a bit. If you just gave them water and promix they would do ok, but the nutrients build up in the soil and if your watering/feeding every day and a half you need to account for how much is ending up in your soil. Most people over water and over feed and over prune. Just let em grow. If something is wrong with your bloom is easy to think that you need to feed them PK because that's something you have control over, but it won't matter how much PK you pump into them if that isn't the issue which the vast majority of the time it's not. Honestly the best grows are the ones I thought I might have been under feeding. Seriously lazy pot farmers grow good weed lol.

Sounds like a plan then, Glomus. I'll back off to half of what I'm currently using for the next week and see how it does before going to straight water. I've got a microscope that attaches to my phone via USB cable so I can get incredible closeups of the trichomes. Currently, on the buds they are still mostly clear just starting to get cloudy. On the sugar leaves they are mostly cloudy and some are turning amber, but only on the leaves which I'm told will turn first. I'm checking every day to see how they are coming along, and when they're almost all milky and some are just starting to turn amber I'll cut her down and start the drying/curing process.

As for the pruning, I had been training it from the start and tying it down, so anything below the canopy I cut off early and throughout the veg stage. I did do a further defoliation on day 21 after flipping to 12/12, and since then I've only pulled the odd fan leaf if it is shading out another bud site. I'm sure I probably went a bit too far or too late, but it's a learning process and my second grow will learn from the mistakes in this one.

Again, thanks for the advice and guidance, Glomus. I appreciate every bit of it.

Cheers,

BA.