First small grow week 1 flower

[Greenfingersthc]

I have these in flower now for a week. I have increased the hps to 600w and feeding with a ph between 5.8 - 6.2 for coco but need help as to whats causing the browning on the leaves. Its only noticeable on the 1 white widow, and only on one area at the moment, but feed all 3 the same solution.





Not sure if its a nutrient problem or more of a deficiency.
My watering schedule is 2 days water and 2 days feed alternatively.
Using canna coco schedule. Doses are per litre...
a+b 2.7ml
rhizo 2ml
cannazym 2.5ml
canna boost 3ml

white widows get 4 litres every water and sweet zombie gets 3 litres

[CaptainWiese91]

Are you using cal mag ?
im using CANNA products as well.
but I can’t see no cal mag supplement?

how big is the pot?? 4 liter sounds a lot..

[Greenfingersthc]

No calmag. Dont know how or when to use. Im following cannas coco feeding schedule which does not state to use calmag.
pots are 15 litre...the water or feed lasts for 2 days usually but seem to be drinking faster.
I thaught it might have been boron deficiency so I keep my solution below 6.2 ph. Thankfully the browning is not progressing.

[CaptainWiese91]

There is no natural cal or mag in coco, so you need to apply it yourself. It’s a vital mineral for the plant

[Greenfingersthc]

Hi CW!
So im using calmag. No precise doses, just until ppm is within parameters. I am struggling with this as my ec pen readings fluxuate alot. Not sure best way to prep nutes (eg ph down first then nutes then calmag??)
But only one plant continuing to be affected.

[CaptainWiese91]

Nutes and supplements in first. Wait 40-60 min, then adjust the PH to the range you want.

[Greenfingersthc]

Most apreciated. One last thing mate, could I take a few larger leaves off to increase light to lower buds? Especially the calmag deficient ones?

[CaptainWiese91]

Yes, it should be no problem at all mate