Fan leaves purpling day 36 flower

So the last couple days my fan leaves have been turning purple from the inside out which tells me they have a phosphate difficency. Should I change my res to a late bloom schedule or can I just start adding the late bloom/ripening nutes to the reservoir when I add fresh water?

Probably not a P issue with a complete plant food. Most certainly pH and/or root rot related. May be to strong nutrient mix causing pH to fall out of range. May be bad watering practices or operator error if you run hydro like DWC.

Cannabis need very small amounts of phosphorus to flourish. High P bloom foods is only a result of marketing.

Hydro, coir or peat based? Need more data to properly help like what medium, plant food and pH?

sierra_indoors said:

So the last couple days my fan leaves have been turning purple from the inside out which tells me they have a phosphate difficency. Should I change my res to a late bloom schedule or can I just start adding the late bloom/ripening nutes to the reservoir when I add fresh water?

Click to expand...

Probably too cold

oill said:

Probably too cold

Click to expand...

72 at night 81 during day

sierra_indoors said:

72 at night 81 during day

Click to expand...

That's not it then. My rooms is typically at 75-77F during winter months and I always try to keep it under 76F in late flower to combat mold.

What system are you running? Hydro, coir or peat based mix??

Rdwc with a chiller running floraflex,slf100,floralicious plus, calmag under 1000w double endeds

Running 2.0 ec atm just bumped it up from 1.8

sierra_indoors said:

Rdwc with a chiller running floraflex,slf100,floralicious plus, calmag under 1000w double endeds

Click to expand...

I would personally drop the floralicious plus and Calmag if you're not running a carbonate based like "Calimagic" to stabilize pH. You need a clean stable solution, dead organic matter is a recipe for disaster with bad bacteria cultures as a result.

I don't know about SF100 but it seems to be an enzyme product? SouthernAG garden friendly fungicide is your best choice if you live in the states. It contains 98% "bacillus amyloliquefaciens", same as Hydroguard but concentrated.

Floralicious plus is not really intended for DWC, strictly for DTW grows IMO, way to dirty for DWC.

1.8-2.0 EC is also really high for running DWC with HID's.

sierra_indoors said:

72 at night 81 during day

Click to expand...

Probably not then. Nowt wrong with some our purple in the stems

oill said:

Probably not then. Nowt wrong with some our purple in the stems

Click to expand...

So i figured it out. My ph probe was off 2 points got it dialed in a 5.8 now hopefully the plant will eat some phosphorus now