Dark spot tip of buds

[Hedimitrius]

I've got two Jack Herer autos growing in a 3x3. 2 - 300w hydro crunch LEDs, osc fan, lung room supplying avg 45 rh in tent. Using GH trio with calmagic. These ladies are on day 45 and flowering nicely with that signature jack herer flower stretch. Also like jack herer strain, they have been temperamental. All the buds in only one of the two plants have dark spots on the tips. The other plant has none (possibly different phenos). It looks brown under LEDs but mostly purple without them. I am nervous of bud rot but it's on the very tips, not on the inside near the stem like bud rot. Next I suspected light burn but my lights are 26" away and any further may not be enough light to pack those nugs thicc. Posted are pics under the led and under normal light. Any experience is appreciated. Thanks in advance for your replies.

 

[BigCube]

Maybe too soon to tell. But seeing as you have purple on other parts of the plant, I'm inclined to think it's just purple. If it gets soft and squishy you've got bud rott.

 

[Hedimitrius]

Maybe too soon to tell. But seeing as you have purple on other parts of the plant, I'm inclined to think it's just purple. If it gets soft and squishy you've got bud rott.

I think you're right and it's just some purple coming through. I got to take some pics today. It's progressing rapidly.

 

[Brotofsky]

Looks nice and possibly strain specific, but does look a bit like a harvest fade, that you are far from. Are you only using bloom nutes from the trio?

 

[SadBadGrower]

My Jack Herer turned purple too.

 

[Hedimitrius]

Looks nice and possibly strain specific, but does look a bit like a harvest fade, that you are far from. Are you only using bloom nutes from the trio?

I've been using all three and calmagic in small amounts all the way through. I changed my ratio of 2;1 grow/bloom to 1;2 when they were fully into flower. I have probably been feeding them not enough nutes. Started researching today and my ppms are nowhere near high enough. Also, I am going to start watering with more nutes to runoff instead of flushing every couple days. Hopefully that will help with some of that fade.

 

[Brotofsky]

I’m pretty sure the bottles say never use the grow( green) and bloom( pink) at the same time. Why do you flush so much?

 

[Beachwalker]

I’m pretty sure the bottles say never use the grow( green) and bloom( pink) at the same time. Why do you flush so much?

They're always used together, you might be thinking of the Lucas formula?

Agree with the frequent flushing, that's probably a big part of the fade