Tip burn 1.2EC max

[Ziggaro]

I started getting some tip burn soon after switching to 2x/day feedings from 1x/day. Plants were/are growing really fast, and the roots are super healthy. Plants are 3 feet tall in 1 gallon pots. They're currently in the 3rd week of flowering.
I'm using the Head ratio but at a lower strength. PH is between 5.5-6 and plants are in pure coco.

Other than tip burn the plants are showing no real signs of stress.
Too much N? Not enough Ca? I'm not real sure what's going on. Do they need less nutes the more I water?

Thanks for your help!

 

[RB26]

So what is the strength you are feeding?

 

[Cannabean]

more importantly, what's the runoff EC at?

 

[Ziggaro]

Runoff is between 1 and 1.5 EC depending on the plant. They all have slightly burnt tips, though.
Feed was 1.2 EC, but I'm running 1.0 EC right now trying to see if it helps. I can't tell yet, but I can't see anything wrong with the tips of the newest bud leaves.

 

[DabOnDabs]

Runoff is between 1 and 1.5 EC depending on the plant. They all have slightly burnt tips, though.
Feed was 1.2 EC, but I'm running 1.0 EC right now trying to see if it helps. I can't tell yet, but I can't see anything wrong with the tips of the newest bud leaves.

Testing your runoff in coco doesnt tell you hardly anything about whats going on in the media.

Do a slurry test. How serious is the burning? pics?

1.2 EC feed 2x per day shouldnt cause burning. Thats pretty low. I fed my last run 1.8 EC up to 6x per day in weeks 3-6 of flower. no issues. (using heads formula), on top of 170 ppm tap;

 

[urbangroop]

In my experience with the H3ad formula so far.. I fave found that like with any other nute line different strains react differently to the recommended feeding recipe[all be it H3ads is more of a custom mix]. Are you running different strains? Also your running 1Gal. containers with mature sized plants 2ft. without the pot I believe you said. is your coco ever drying up on top?

 

[TheCleanGame]

---snip---

 

[watts]

^the pH in coco rises when it dries out, not lowers. You are thinking of straight hydroponics.

I'm using the Head ratio but at a lower strength.

You should be feeding full strength head nutes at 6/9 around 5.8 pH

 

[RonSmooth]

I wouldn't worry about it. Seems like chasing down a "fix" may end up causing more, real problems.

If everything was going well with 1X/day feeding, why did you switch? Why not go back to what was working?

 

[Ziggaro]

It's all good fellas. I started mixing tap up to .2EC and using the same total nutrient strength and I'm not seeing any more tip burn.

I started on 2x/day because they were drying out too much. If I watered 1x a day they'd be bone dry by the time they were watered again.
Next time I might go up to 3x because they seem to love all they can get. When they dry out too much on top they seem to get a little bit of visible salt buildup. It doesn't seem to happen on the ones that stay moist. Plus, I've never had such a beautiful root system until now.

Thanks for the suggestions, everybody, but I got it from here!