Plant deficiency?

Smalls420 · Oct 31, 2019

Hey everyone I'm having some issues with a few of my plants. They are pineapple express grown in coco in 5 gallon fabric pots under two 2000w leds. I have plants both in flower and veg with these conditions so they ones in veg are under 18/6 lighting and 11/13 for the ones in flower. They are being feed at 3ml/l of their respective nutes and 2ml/l of CalMag.They are watered every 2-3 days. Thank you in advance for your help!

HugePeckerhead · Oct 31, 2019

Possibly phosphorus but please allow some other members to chime in before doing anything. They'll get you in the right direction. @Emilya

PE636 · Oct 31, 2019

Coco should be simple.. What your ph going in? You should be watering daily or more to runoff especially the flowering girls.

Smalls420 · Oct 31, 2019

PE636 said:
Coco should be simple.. What your ph going in? You should be watering daily or more to runoff especially the flowering girls.

Ok good to know I'm just starting with coco PH is 6-6.3

PE636 · Oct 31, 2019

Ya 6 is fine I find, some people like a little lower and I've seen a little higher too. Kinda depends on your water.. Anyway you want to be basically rinsing the coco clean with fresh nutes daily if at all possible. For example, my nutrient solution is around the 500 ppm including 90ish well water,a bit more or less depending on the plant and phase of growth. Do you have perlite in there? I've done with and without, you can probably skip the odd day without perlite without any issues. I've even had different kinds of coco that definitely hold different amounts of water.

Smalls420 · Oct 31, 2019

I'm running straight coco 2 days or so seems to be when the coco starts to get damp but not dry I'm currently watering to a small amount of run off maybe about a third of what I put in

Emilya Green · Oct 31, 2019

pH in the 6 range is not where you want to be in coco. The correct range for hydro type systems is 5.5-6.1, with the center sweet spot being 5.8 pH. This and giving way too many nutes appears to be the problem here. Most people water coco at 1/4 strength nutes 2 times a day, keeping the medium wet.

PE636 · Oct 31, 2019

I guess I'll have to check my meter calibration for the millionth time, because these were all 6-6.2 in flower. IMO as a coco grower anything under 5.6 is too low especially for flower.