On feeding strength

Indoor Growing
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#1

I’ve always grown with pre fertilized soil, like Biobizz Allmix and Canna Profesional and the like and always struggled in flower where the slight dose of bloom nutes would be a risk of over feeding, even with symptoms of P or K deficiency, due to the high levels of N in the soil.

This time I decided to try a light mix. I’ve had to push the feedings higher every time or the plant gives me deficiency symptoms. I’m 2 days into the 9th week for 3 autoflowers on 24/0 and had gone as high as 3.9 EC (1950 PPM)
Here’s the 1st plant: Barney’s Farm Pineapple Express at day 55

Pineapple Express 55 - 01.JPG3648×2736 1.97 MB

Here’s the 2nd: FastBuds Crystal Meth

Crystal Meth 55 - 01.JPG3648×2736 1.93 MB

And the 3d one: FastBuds Tangiematic

Tangiematic 55 - 01.JPG3648×2736 2.36 MB

What are your experiences with growing on light mix? Is this normal?

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#2

I don’t think it will be a lite mix any longer if you’ve pushed 1950ppm through it. What does the runoff ppm read??? Maybe they are just nearing the end of their life cycle and dying off.

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#3

I thought autos were notoriously light feeders?

Your plants don’t look burned… but maybe a lockout?
They look like they have a ways to go, so it might be an option to start treating the “light soil” like coco and give them a flush and reset?

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#4

Not necessarily. Some will take really high ppms of nutrients. It’s strain dependent I think. I always feed heavily and record the response until I see a negative reaction. I then dial it back a notch or two to where they were thriving and happiest. If your able to keep the ph in the correct 5.8 - 6.2 range they will take a much higher ppm as each element can be up taken correctly by the plant. :+1:

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#5

I do believe it depends on the strain as @Esrgood4u said
But for myself I feel I achieve better results feeding less I do boost p and k during the proper schedule even then I’ve learned less is best
Only my 2 cents

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