Nute lockout? Deficiencies?

FFOF,/coco/perlite 60/20/20
6.5 weeks in soil
7gal pots
2x 1000w lights
73-79°F
28-36% rh. (P.m. issue, trying to keep at bay until sulfur vape arrives)
Strains showing damage- ethos cookies, orange sherbert
FF grow big applied 2x @1/4 strength and 1x @1/2
Cal/mag applied 40% strength 1x shortly after transplant and 1x about 1.5 weeks ago. (Admittedly, shouldnt have used it last feed)
Tap water sat out for ~36hours, no clue on ppm's.
Feed every other watering ~4-5 days between each
Slurry test read 6.6

Started seeing the brown patches shortly after last feeding. Stopped nutes and watered 50% heavier than usual. Just ph'd water since. Seems to have stopped in one plant, slowed in another and took off in the 3rd.

What do I do? Heavy flush and reintroduce nutes/microbes? Keep with just h2o for a while? I can't imagine the nutes aren't available in FFOF.

They look hungry to me. I would up your feed to 75%. Red stems with other deficiencies is a pretty good sign of long term underfeeding

93OG said:

They look hungry to me. I would up your feed to 75%. Red stems with other deficiencies is a pretty good sign of long term underfeeding

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Not what I was expecting as I've read the soil is pretty hot as is.

FFOF does have nutrients in it but only enough for about 4 weeks and you mention they've been going for 6.5 weeks.

I run in FFOF and I usually start light feeding them 3-4 weeks after transplanting. I may give them light cal/mg and some Recharge in that time.

I have also noticed that I start to see Calcium lockouts early on with some cultivars. I started adding dolomite lime with my last run, 1 cup per cubic foot, so hopefully that will help.

Why are your leaves so shiny? Is that from a foliar? No criticism just curious.

Qube said:

FFOF does have nutrients in it but only enough for about 4 weeks and you mention they've been going for 6.5 weeks.

I run in FFOF and I usually start light feeding them 3-4 weeks after transplanting. I may give them light cal/mg and some Recharge in that time.

I have also noticed that I start to see Calcium lockouts early on with some cultivars. I started adding dolomite lime with my last run, 1 cup per cubic foot, so hopefully that will help.

Why are your leaves so shiny? Is that from a foliar? No criticism just curious.

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Yes, its my fungicide, organocide beesafe. I suppose I will keep up the grow big and start adding in some big bloom. Thanks guys

Jorro said:

Not what I was expecting as I've read the soil is pretty hot as is.

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Only 60% of your mix is FFOF tho. Feed ya plants mang!