Is this nutrient burn or a deficiency?

[Trigger2k25]

I'm not sure what's going on. They're getting a little over half the recommended strength of nutrients which comes to around 900ppm so I'm hoping not nute burn. They're growing fast enough and aren't showing signs of deficiencies other than the tips and a little on the edges of some leaves (if it's a deficiency).

 

[Nutty sKunK]

Start of nute burn. Yellow leaves won't recover but will stop progressing once you bring the EC down.

Most likely excess K. Excess P causing the tips to burn without any yellowing. Straight to necrosis.

Back of the feed. Plant wants less

 

[coreywebster]

900ppm is either 1.4ec or 1.8ec depending on which scale you are using.

One is plenty, the other is more than plenty.
It's all relative to the medium.

But we have no idea what you are growing in, so knowing the ppm doesn't help that much.

If your in soil you've got some nutrients in there already and you could of been building them up over time by gradually overfeeding.

If your in coco then it depends on your watering practices.

If your in hydro then you need to be paying attention to the rise or fall of both EC and PH to balance it to the level the plants require.

Regardless, Nutty SKunK is on the money.

 

[Trigger2k25]

900ppm is either 1.4ec or 1.8ec depending on which scale you are using.

One is plenty, the other is more than plenty.
It's all relative to the medium.

But we have no idea what you are growing in, so knowing the ppm doesn't help that much.

If your in soil you've got some nutrients in there already and you could of been building them up over time by gradually overfeeding.

If your in coco then it depends on your watering practices.

If your in hydro then you need to be paying attention to the rise or fall of both EC and PH to balance it to the level the plants require.

Regardless, Nutty SKunK is on the money.

Using coco and I ran out of the 'coco' version of AN Sensi so I'm using the regular version that's supposed to be coco safe also.

It's also last year's coco I washed and reused, but haven't had any issues for the first 5 weeks. So excess potassium sounds like it could be the culprit.

Should they recover ok? I was getting ready to flip. They don't look sickly at all otherwise. I do have the coco version of AN Sensi bloom I could start at maybe 1/2 strength after flipping?

 

[coreywebster]

Using coco and I ran out of the 'coco' version of AN Sensi so I'm using the regular version that's supposed to be coco safe also.

It's also last year's coco I washed and reused, but haven't had any issues for the first 5 weeks. So excess potassium sounds like it could be the culprit.

Should they recover ok? I was getting ready to flip. They don't look sickly at all otherwise. I do have the coco version of AN Sensi bloom I could start at maybe 1/2 strength after flipping?

Ah fair enough, 5 weeks is often when youl see an issue .

I'd flush with a low dose of nutrients then feed about 1.2EC twice a day until run off.

I wouldn't worry about the tips as they are, the aim is to stop it getting worse

 

[Trigger2k25]

Ah fair enough, 5 weeks is often when youl see an issue .

I'd flush with a low dose of nutrients then feed about 1.2EC twice a day until run off.

I wouldn't worry about the tips as they are, the aim is to stop it getting worse

So that's about 840ppm? My meter only reads ppm.

I'm hoping flipping to flower also helps the plants use up some of the potassium.

Just double checked the NPK of the nutrients and the regular AN sensi grow has more potassium than AN sensi coco bloom. Should have ordered more of the coco version of grow I guess.