Potassium deficiency?

Can Anyone confirm or point me in the right direction lol
Started about 2 days ago. Has progressed rather quickly started on bottom leaves and has worked its way up to about mid plant.

Looks like a magnesium issue to me rather than potassium.

Potassium usually has spotting aswell as discolouring.

Late stage Mg deficiency also included burning tips!

To me it looks dry and hungry

Pa-Nature said:

To me it looks dry and hungry

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Possibly but lack of feed usually starts with over all paling of the green.

The leaves shown have intervienal yellowing which is indicative of magnesium deficiency.

Ahh. Just started r.o water for the last two waterings,
Last watering was 48hrs ago almost on the dot lol, mixed up 12L with 4 tsp cal mag then added 3 tsp of flora bloom & ph'd down to low 6's used strips cause meter needed calibrating at the time. Got distilled water today to recalibrate . I'm still a bit light on feeding followed the feed chart and ended up with nitrogen tox so took away the micro which was 5-0-0 . first ro watering got the grow & bloom at feed chart strength but my meter was probably off that feed . but it read 6.2 at the time. That feed was 820ish ppm. The one 48hrs ago was 680 ppm.
If it's mag I'm guessing Epsom salts or just up the cal mag? (am I even using enough as it is?).

Lack of nitrogen/mag possibly (both mobile nutrients) since you took the micros out completely.

When you get toxicity, it's not good to remove the element completely. Start by adding 1/4 or 1/2 strength. Many brands are suggested at levels higher then needed. Which puts more money in their pocket. Running at 1/4 to 1/2 strength is best, and let it build up. It's also good to have a nutrient and water alternating schedule, although some like to feed at low doses at every watering. Something like 2-1 or 3-1 ratio. every 3 or 4 watering should be just ph'd water to flush out built up nutrients and prevent individual nutrient toxicity. or an imbalance in your fertilizer ratios.

Also another bad practice is cutting off nitrogen too early in flower. Plants need nitrogen throughout their whole life at varying degrees.

Yeah I cut nitrogen off at 12/12 switch, Was under the impression it wasn't needed during flower , learn something new everyday lol.
Guessing I should add micro back or use all 3 as chart suggests ? 1/2 strength is what id be using .
On a side note grabbed some Epsom salts today & at lights on brewed up a gallon of ro with cal mag & a tsp of Epsom each got approx 1L .

Keep us posted. Very common misconception.

TheHarvester said:

Keep us posted. Very common misconception.

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Figured I'd update
Readded micro to the feed schedule and it's looking a little better lol.

If you're short on Mg and it appears you are, just add the Epsom, not both CalMag and Epsom....you're giving it a Mg overload which isn't helpful either. Slow and steady wins this race...

FYI...12 L = 3.1 Gallons. CalMag suggests 1 tsp per gallon, you added (4). You over did your dose if that's the case and sometimes by adding too much of something we goof up other things. Reel your dose in and add additional Epsom if necessary to fix the Mg issue.

Just my two cents...good luck friend.

It said 2tsp per gallon for heavy feed. And 1tsp per gallon for regular feed. Figured that little extra would help since it was lacking, guess I was wrong lol.

CannaCountry said:

If you're short on Mg and it appears you are, just add the Epsom, not both CalMag and Epsom....you're giving it a Mg overload which isn't helpful either. Slow and steady wins this race...

FYI...12 L = 3.1 Gallons. CalMag suggests 1 tsp per gallon, you added (4). You over did your dose if that's the case and sometimes by adding too much of something we goof up other things. Reel your dose in and add additional Epsom if necessary to fix the Mg issue.

Just my two cents...good luck friend.

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