What's the issue with these leaves?

bigturtles said:

I've searched the forum and read the basic guide to all nute deficiencies, most of them seem to be accompanied by a slowing of growth (which hasn't happened) - so hoping yall can help me narrow it down.

Some info on the grow:

I'm growing indoors, temps average 25-26c lights on and 19-20c lights off, humidity fluctuates between 40-55%. Using HLG 260w blue spec light at about 60cm away from top of plants.

I've been watering every 2-3 days depending on how the soil feels and how heavy the pots are. I've been going nute-nute-water feed on the L.A. confidential and am using the canna range of nutes with the canna terra professional medium. Last couple weeks i've been PH'ing to 5.9 (started at 5. and have moved to 6.0 - 6.1 on the last feed as i started flowering.

Plant in question is L.A confidential and have been giving nutes full strength as recommended on the bottles. I topped 8 days ago and I've just flipped to flower 3 days ago and started to notice these rusty yellow/brown spots on the big fan leaves (new growth seems to be unaffected).

Left plant is kali mist and have been feeding it half strength nutes as i've read it doesn't like a heavy feed and have been going nute-water-nute feed. No spots on this plant.

New growth seems to be unaffected and can already see it starting to stretch in the few days since i flipped - not sure what to do as i can't seem to diagnose the issue?

Click to expand...

bigturtles said:

I've searched the forum and read the basic guide to all nute deficiencies, most of them seem to be accompanied by a slowing of growth (which hasn't happened) - so hoping yall can help me narrow it down.

Some info on the grow:

I'm growing indoors, temps average 25-26c lights on and 19-20c lights off, humidity fluctuates between 40-55%. Using HLG 260w blue spec light at about 60cm away from top of plants.

I've been watering every 2-3 days depending on how the soil feels and how heavy the pots are. I've been going nute-nute-water feed on the L.A. confidential and am using the canna range of nutes with the canna terra professional medium. Last couple weeks i've been PH'ing to 5.9 (started at 5. and have moved to 6.0 - 6.1 on the last feed as i started flowering.

Plant in question is L.A confidential and have been giving nutes full strength as recommended on the bottles. I topped 8 days ago and I've just flipped to flower 3 days ago and started to notice these rusty yellow/brown spots on the big fan leaves (new growth seems to be unaffected).

Left plant is kali mist and have been feeding it half strength nutes as i've read it doesn't like a heavy feed and have been going nute-water-nute feed. No spots on this plant.

New growth seems to be unaffected and can already see it starting to stretch in the few days since i flipped - not sure what to do as i can't seem to diagnose the issue?

Click to expand...

bigturtles said:

Thank you - after further digging all of last night i was arriving at the same conclusion. Also makes sense since i've been primarily ph'ing to 5.8 thus far and based on the graph i'd be getting minimal uptake in cal-mag.

Click to expand...

Bushbaby11 said:

Any better?

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