Ec targets for 2 weeks into flower

geralds · Dec 24, 2019

Hey guys,

I'm two weeks into flower on these stardawg cuts. Im using 4 1000w de lights. (some on 50 percent, some on 100) about 2 feet above canopy.
The plants are in 5 gal fabric pots of Canna w perlite, and have been feeding 1.1-1.2 EC of Canna AB, Rhizo, Cannazyme, everyday.
I'm also supplementing c02 @ about 1000ppm. Plants are approx. 4 feet tall. My question is does this sound high enough for these plants under these conditions? Ive noticed just a sliiiiight bit of yellow tips on some of them. So little that its hard to see. Is the tip yellowing the number one indicator of overfeeding or could that be caused by the light? Also on one plant I noticed this "rough look" and this one plant doesn't seem to have very many, if any white pistols where all others do. Any advice you guys can throw my way would be greatly appreciated. Thanks!

oldskol4evr · Dec 24, 2019

Enforcer · Dec 24, 2019

geralds said:
Hey guys,

I'm two weeks into flower on these stardawg cuts. Im using 4 1000w de lights. (some on 50 percent, some on 100) about 2 feet above canopy.
The plants are in 5 gal fabric pots of Canna w perlite, and have been feeding 1.1-1.2 EC of Canna AB, Rhizo, Cannazyme, everyday.
I'm also supplementing c02 @ about 1000ppm. Plants are approx. 4 feet tall. My question is does this sound high enough for these plants under these conditions? Ive noticed just a sliiiiight bit of yellow tips on some of them. So little that its hard to see. Is the tip yellowing the number one indicator of overfeeding or could that be caused by the light? Also on one plant I noticed this "rough look" and this one plant doesn't seem to have very many, if any white pistols where all others do. Any advice you guys can throw my way would be greatly appreciated. Thanks!

With plants that size, I think you probably should be feeding more than once a day. I think the coco may be drying out too much between fertigation events. I do that EC 6x a day in 3 gal pots under an HLG550v2 without co2. I think you’d be not only be safe but beneficial to go to 2 or 3x a day.

JDerek · Dec 30, 2019

I keep my hps in flower at least 3ft off the canopy and at 2 wks my ec is 1.6 with Canna a & b, cannazyme, rhizo, and boost.

Dirtbag · Dec 30, 2019

Have you tested runoff ec and ph? I also think they're getting too dry and the EC is spiking. In coco I used to run low numbers frequently, like 3-5 feeds per 12 hr lights on cycle in full bloom at 400-500 ppm give or take.

geralds · Jan 3, 2020

Yes I’ve test runoff a few times a week. Right now I’m feeding at 650ppm and the runoff on most all of them is around 750. One of them is around 1000 which I’ll probably do a few heavy irrigations at lower strength. But I do think the pots are drying out just slightly. Maybe I’ll set the timers for twice a day. I just don’t like doing the auto way because it’s hard to find tune the ball valves so each plant gets the same. Should I lower feed strength when doing multi feeds?

JDerek · Jan 3, 2020

Mine a

geralds said:
Yes I’ve test runoff a few times a week. Right now I’m feeding at 650ppm and the runoff on most all of them is around 750. One of them is around 1000 which I’ll probably do a few heavy irrigations at lower strength. But I do think the pots are drying out just slightly. Maybe I’ll set the timers for twice a day. I just don’t like doing the auto way because it’s hard to find tune the ball valves so each plant gets the same. Should I lower feed strength when doing multi feeds?

Re

JDerek · Jan 3, 2020

I feed auto 3x daily. I keep EC the same and just reduce the volume given.

Ec targets for 2 weeks into flower

Ec targets for 2 weeks into flower

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